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Category: cycling

Broken Derailleur Hanger

For the first time in my life, I’ve broken a derailleur hanger. Yesterday when riding at Bald Mountain Recreation Area, a few miles from my car which was parked at Addison Oaks, I heard a thunk and looked down to see the derailleur in a rather awkward, unhelpful position (photo). Sunset was coming soon, and while I had lights the Oakland County Police who patrol Addison Oaks† are not fond of those who are in the park after dark, so I had to do some quick thinking to get back to the car.

Along with breaking the derailleur hanger, the derailleur cage itself was twisted, so I figured there was no way to get rolling without making the bike a single speed‡. I removed the derailleur, strapped the cable and housing back, broke the chain, and re-connected the chain in the best gear combination I could identify for decent chain tension. While there were occasional shifts up and down the cassette as the chain bounced, this worked well until I was climbing the final hill before Lake George Road.

With a bang the chain had ridden one cog on the cassette higher than intended, tensioning the whole assembly so tightly that I couldn’t turn the cranks. Opening the quick release rear skewer transferred tension to the skewer, bending it, and making things worse. Since the bike would freewheel my only choice at that point was to walk the bike out, hopping on to coast down hills. Thankfully I was only two miles from the car at this point.

I’m still not exactly sure what happened to cause the break, but I can’t help but suspect that yesterday’s crash had weakened it somewhat. Even though was shifting fine and the derailleur appeared straight, I suppose this could have played some part?

Once I got home I set to fixing the bike, and thanks to having a spare derailleur (leftover from making the El Mariachi a 1×9) and basic parts like a spare derailleur hanger, chain, and cable, I was able to get the bike working nicely again. It also gave me a good reason to wash the bike and clean Orange Seal residue from the tubeless valve stems. When the chain bound one cog on the cassette became slightly bent, so now it makes a bit of noise when riding, but it wasn’t noticeable on a test ride. I’ll try to bend it back when I next have the cassette off the bike.

The photo above shows the broken derailleur hanger, and what I believe to be plastic deformation. I find the stretching of the laser etched “Wheels Mfg Droput-25” logo to be particularly fascinating, as it shows how the aluminum stretched before failing. The thin, torn off sliver is interesting to me as well.

After the work my bike is back in order, and while everything seems in place, I need to give it a shakedown ride before I’m willing to take it out on remote trails. With luck I’ll be able to squeeze this in tomorrow morning.

† It seems that junior / trainee officers are regularly assigned to Addison Oaks, and they seem to take a hard line which makes them less than pleasant to deal with. While a broken bike likely would have been a fine excuse for being in the park after dark, I didn’t want to deal with this.

‡ In retrospect after inspection at home, I probably could have gotten the bike well enough to ride out with a new hanger. I’d have had to deal with a bunch of mis-shifts, but at least I wouldn’t have bound the chain and had to walk. This is what I should have done… Oh well, at least it was a nice day and now I have a story.

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Anatomy of a Crash

 

Today’s weather was cold — right about freezing — but sunny and with very low wind, which is just about perfect for getting in a mid-afternoon ride on hard, snowless trails. Riding this time of year is almost like riding on concrete trails and generally quite fast, save for the occasional spots where a thin top layer has thawed in the sun. These spots end up acting like grease sitting on pavement and require a bit of caution and attentiveness. Riding today… one got me.

I was following the 6/12 Hour Route that I so love, and just after the Grassy Knoll heading towards Woohoo Hill there is a long, sweeping turn section that’s fairly flat and pretty basic. It can usually be ridden quite quickly, but today 50′ or so had a thin greasy layer and I ended up crashing on it, sliding along for a ways on my hip.

The photo above shows where my bike ended up (click here to embiggen), and what I find most fascinating about it is the forensic evidence it contains:

  • Lower left corner of the image is where the normal tread (45NRTH Hüsker Dü) in the mud layer ends. I would have been leaning the bike slightly at this point.
  • The long bar-like tread marks are where the tire began to slide, and the wide side knobs left grooves in the direction of the bike sliding to the outside of the turn as the tire rotated forward. This indicates the bike was leaning quite far by this point.
  • Rear tire track is on the left, evidenced by it being on top of the track on the right.
  • The tires then hit a small root, which being on an unsuspended bike impart a bit of bounce. This is why there is a gap in tire marks after the root.
  • Rear wheel was moving in a wider radius than the front, which is not what normally happens. The bike was thus no longer pointed in the direction of travel.
  • Wobbles and gaps in the tire marks indicate that the bike was pretty much sideways and out of control at this point.
  • The flattened-smooth part of the tire marks is where my hip/right leg first made contact with the ground and I began sliding.
  • The S curve and straight grooves in the dirt (directly below the top of the rear tire in the image) are from the brake lever and end of the handle bar. The brake lever made the S mark as it compressed and while pushing into the ground.
  • Light mud is visible on only the right half of each tire. This shows that I was already leaning the bike when I hit the greasy mud.

So, what’s the takeaway? It’s a pretty simple message: don’t lean the bike when encountering greasy mud, and if there’s a need to two-wheel side through an area like that, try to avoid bumps that’ll contribute to a loss of traction. Normally I’m good about both of these, but today… I wasn’t. And I have the bruised hip and scraped knee to show it.

On the next pass through this section I was much, much more careful… This isn’t something that I needed a photo to know, but I do think it’s pretty nifty to see post facto.

 

 

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Garmin Hub-based Speed Sensor for Fatbiking

For years I’ve advocated for the use of a wheel speed sensor to augment the data of GPS-based bike computers in order to alleviate distance issues caused by aliasing. Up until recently the only good options for this were traditional magnet-and-reed-switch units like the Garmin GSC-10 Speed/Cadence Bike Sensor and the Wahoo Cycling ANT+ Speeed/Cadence Sensor. These sensors work well in general, but I’ve had issues with them on my fatbike.

Because of  snow buildup on the rim (photo) the sensor is positioned closer to the hub (photo) to keep it from scraping in the snow. Withof the further-back position near my heel and the frequency of falling over when when riding in snow, it’s not uncommon for the sensor to get knocked around and tilted slightly inward. This causes the reed switch arm of the sensor to knock against spokes: the usual tick-tick-tick sound. It seems that these repeated, gentle physical impacts break the switch, as I’ve now had two which stop picking up wheel speed after a year or so on my fatbike. The rearward positioning also makes it impossible to use the cadence side, which feels a bit wasteful.

Garmin recently released a new series of speed/cadence sensors which use internal motion sensors instead of magnets (sensor bundle page on Garmin’s site). These were reviewed in great detail over here by DC Rainmaker, and the hub-based speed sensor seemed a perfect fit for my fatbike. This design will stay away from both the snow and my heels, and lacking a reed switch there isn’t that part to fail. The lack of cadence sensing on a fatbike is fine with me, as it is used in such mixed conditions such data isn’t very useful. When cleaning up my fatbike earlier this week I ordered the standalone speed sensor ($39.99 from Amazon) and fitted it last night before heading out for a ride.

My first impressions are very positive. It connected to my Garmin Edge 510 just as I’d expect, and a ride through River Bends parking lot automatically calibrated it to a sane number. A 1.5 hour trail ride near dark went fine with it, and it just seemed to work, similar in function to the GSC-10, but with a technical implementation that is more suited to fatbiking. I’ll stick with the traditional reed switch sensors for my other bikes, as I haven’t had the same kind of difficulty there and I don’t strap-to-crank-arm sensors, but for here on the Mukluk, it seems a good fit.

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Bike Stuff for Sale

Shuffling around bike parts and upgrading things have left me with some spare parts that I’d like to sell. Prices and photos are listed below, and I’ll consider reasonable offers. I live in Shelby Township, MI and work in Warren, MI and will be glad to meet anywhere in this general area to handle a sale. Contact me at c0nsumer@nuxx.net if you are interested.


Stan’s NoTubes Arch EX / Shimano XT Wheelset – $350: These are the stock wheels from my Salsa El Mariachi Ti, replaced only when I built up some carbon fiber wheels. Front is a 15mm TA and rear is QR, centerlock rotors. Very solid  build and the freehub was recently replaced. Comes set up tubeless with Racing Ralph (2.25″) and Small Block Eight (2.1″) tires. The tires are well used, but still have some life in them, so I figured I’d include them.


SRAM Rival 2×10 Gravel Road / CX / Touring Drivetrain Kit – $600: All new parts purchased for a gravel road bike build that fell through. This would also be a great touring setup, CX setup, etc. All that’s missing is brakes and a frame to put it on. This is an outstanding value build kit, all-Rival solid stuff that works well. Items included are all SRAM Rival level: 31.8mm front derailleur, short cage rear derailleur, front derailleur shim (1-1/4″ seat tube to 1-1/8″ clamp), DoubleTap shifters (retail box, with full cables and housing), crankset (172.5mm arms, 50-34 chainrings), bottom bracket, PG-1050 cassette (12-28), PC-1051 chain.


SRAM Apex 170mm Crank Arms – $20: Very mildly used set of solid cranks. I removed these from my Salsa Vaya to go to 172.5mm cranks and have no need for them. I’ve got a set of new 50-34 rings, new chainring bolts, and new bottom bracket for it that I’ll throw in for another $45 ($65 total) if you want to make this a complete crankset. Want to try out different length cranks? Need a cheap but solid set of cranks? This is a good way to go.


Serfas Seca FPS Road Tires – $Free / Beer: 28c Serfas Seca FPS wire bead road tires. Cheaper tires that came on a used bike I bought, but plenty of life left in them. I prefer wider tires and have plenty already, so I don’t want these… Got a use for them? They are yours… I’ll trade for beer, a good story, etc.


 

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Clement Crusade PDX for CX Stuffs

About a year ago, when getting ready for the Detroit Invitational CX Race (DICX), my friend Joe lent me a worn pair of Clement Crusade PDX tires that he wasn’t using. I used them a few times over the year, for a couple of single track rides and some cyclocross (CX) races, but last week he asked for them back.

I’m not much of a racer and only have a need for the tires a dozen or so times a year, but I wanted want to have something other than my usual set of gravel road / pavement tires for these times. Particularly as the CX races that I do tend to be some of the more fun events I went ahead and ordered my own set.

These are generally considered quite knobby when it comes to CX tires, something that the more serious people would reserve for muddy conditions, but I found them to be sufficient for my amateur needs on all off road surfaces. During a test ride at River Bends last year I was shocked with just how well they cornered, and at DICX and Barnyard CX (a friend’s private race on Labor Day) they did a great job of grabbing into grass and the soft surfaces usually associated to more-casual races.

The tires have now been fitted to the Jamis Nova, my CX/trainer bike, and if things work out as I hope tomorrow I’ll get to use them during some sunset-time race practice at Bloomer Park and a couple of races this autumn.

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Another TrainerRoad Setup

For the past two years I’ve been using TrainerRoad in the basement while riding on a bicycle trainer during the winter months. I’m normally not too keen on getting exercise for its own sake, but I’ve found that sometimes I get feeling grumpy and a bit of exercise, such as riding on a trainer, helps. Along with fatbiking it also helped keep up my fitness over winter, making bike riding in springtime a good bit more fun.

The setup that worked really well for me last year can be seen here, where an old Asus Eee PC (netbook) handled the job of running TrainerRoad and logging data. This worked, but the machine is slow enough that it’d get in my way whenever I needed to update, fiddle with settings, etc. Having some time off work this week and wanting to improve a bit, I decided to see what I could do using spare hardware from around the house.

Using a slightly-more-powerful-than-the-Eee PC Asus EeeBox EB1501 that I’d purchased in an ill-fated attempt to use it as an HTPC I connected it to an old Dell Ultrasharp 2005FPW display that was originally purchased for use with a PowerMac. It was first positioned directly in front of the bicycle — just as the netbook was — but this felt really awkward so I went looking for other options. What I’ve settled on thus far is seen above; the 20″ LCD display placed above the television, showing the relevant data and workout graph. A single computer speaker is placed next to the computer so I can hear the end-of-interval countdown beeps, and the ANT+ USB receiver is placed to be pointed directly at the bicycle.

The mouse and keyboard are wireless, so I should be able to set them near the bicycle and pull them out as needed, but as individual workouts in TrainerRoad are started and paused by pedaling (or stopping) they likely won’t be needed very often. No longer having the laptop and stand in front of the bicycle should allow different positions for the blower fan which helps keep me cool. I’ll probably try straight-on first, since that’d be closest to actually riding outdoors.

My biggest fear with this setup is that there’s some on-screen detail that I’ll miss (overall time, parts of the graph) or I’ll find myself getting off of the bike regularly to adjust something in the application itself. If this doesn’t work out, I might look at something like an older iPad, seeing as TrainerRoad has an iOS app under way now… Or maybe my Nexus 7 tablet, if the Android version is ever released. Either would work nicely on a small handlebar mount and probably be quite efficient to use.

Now if I could only find the irritating tick in the bike when pedaling under load… Maybe that’s a project for tomorrow.

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Marquette, MI

With two weeks off of work I took some time to head up to Marquette, MI for some mountain biking focused around the Noquemanon (NTN) Trail Network. Thanks to suggestions from my friends Nick and Marty Shue it was very easy to find my way around and I had a great time and I’m looking forward to my next trip there.

Here’s a dump of my thoughts consolidating information.

Lodging / Location

I stayed at the Ramada in downtown Marquette. Location for this was excellent, with a couple mile easy bike ride (via safety paths / non-road bike/foot specific trails) to both the North and South trail areas. These same trails extend for miles outside of town and would make for good road riding as well. I stayed in room 106, which was a single queen size bed located quite close to an outside door. This was very convenient for riding to and from the hotel. The room itself was nice, although it felt a bit damp in there and gloves/clothes took quite a while to dry.

The Hampton Inn location would also be good location-wise, but it’s quite a bit pricier than the Ramada.

Local Bike Shop

Upon arriving in town I stopped by Sports Rack, located about a block from the Ramada, to purchase an up-to-date trail map and get suggestions for riding. The folks here were extremely friendly, sold maps with all monies to benefit the NTN, and just seemed like a great shop. I didn’t need to buy anything from them, but if the need had arisen I would have gone here immediately. Definitely seemed like a great shop for summer and winter riding.

Food

The following restaurants were recommended to me by Marty, along with my thoughts on each. I would gladly eat at any of these again next time I’m in Marquette:

  • The Vierling: Little more upscale, but still casual and friendly. I had the whitefish with pasta, which was good, but the pasta was kinda lump-ish and together, which might have been caused by all the cheese. Still tasted good, though. Beer was good, even though when walking by the brewery one evening I saw an employee smoking while working in the brewing area.
  • Jean Kay’s: Seems to be proper pasties, nicely located between the North Trails and downtown not far from the bike paths. Good outdoor seating and deck for keeping an unlocked bike. Very tasty, not too heavy, great after a few hours of riding.
  • Donkers’ Restaurant: Candy shop / restaurant with good breakfast. Hash browns seemed a bit oily and I was disappointed that the sausage patty on one of the breakfast sandwiches seemed to just be a typical patty instead of something locally made, but it was still good. I had breakfast here twice.
  • Vangos Pizza: Bar that serves excellent pizza. Ate a small (one size up from a For One) with pepperoni, mushroom, and their house made sausage. Surprisingly good crust. Easy walk from Blackrocks as well.
  • Dead River Coffee: Really tasty coffee. I had a cappuccino while reading All my friends are dead.. I was there early enough in the morning that it was just myself and some employees so I felt a bit out of place (they were deeply discussing coffee roasting quality control techniques and whatnot), but not uncomfortable. This seems like a proper small coffee shop with people who really care about making good coffee.
  • Blackrocks Brewery: Probably my favorite of the local breweries. Great beer, really comfy atmosphere. Lots of bikes locked up outside. Bring food from elsewhere, though. Built in an old house.
  • Ore Dock Brewing Company: Another big name local brewery. Great beer as well, but didn’t feel as comfortable to me, perhaps because it’s more of a large hall-type building. Has pretzels (hot and cold) and popcorn for food, but also allows outside food.
  • Third Street Bagel: Bagel / sandwich place. Ate a breakfast bagel from here which I’d first purchased intending to eat while driving, but after seeing its size I ate it sitting outside the restaurant. Also has good coffee. Both were quite tasty and made for a pretty quick breakfast.
  • Togo’s: Sub/sandwich place. On recommendation of an employee I had the hot pastrami sub with mustard and horseradish. This was a good choice; ate it at Ore Dock Brewing Company.

Trail Routes and Difficulty

To start, the maps on the NTN website are not as up to date as the one which can be purchased at the local shops. Additionally, the purchasable map does not include the 1-2-3 portion of the Harlow Farms Connector Trail which is incredibly useful for accessing the south trails from the Iron Ore Heritage Trail (rail trail / non-motorized path) which runs through downtown and within a couple hundred feet of the Ramada. Signs like this lead the way. Still, this was quite easy to find when actually riding, and both of the main Marquette systems were close enough to downtown that I didn’t regret riding to the trails each day.

Once on the trails, though, the marking is outstanding. I almost never had a problem figuring out where I was on the South Trails, and only a couple parts of the North Trails (in particular in The Cedars section where the trails is very close to the Noquemanon Trail and there are a spiderweb of connectors) where I got a little confused, but I wasn’t lost — I just wasn’t sure if I was on the right trail. It was still loads of fun, though.

Anxious to get out and ride, on my first day of riding I found myself on a black diamond trail, and this is where I had my first fall. I was trying to ride up some rocks, got my wheel stuck, and just toppled over. I slid a bit, but wasn’t hurt and was more amused than anything else. This photo shows where I fell, which in retrospect (and after riding other trails there) was really quite an easy spot. I think I may have been arrogantly pushing a bit that first day.

What I learned was that the trail designations are pretty spot on to the IMBA descriptions. Black diamond is about my upper limit, and these seem to either be because of exposure (steep drop-offs) or technical challenges, or a mix of both.  I can deal with both by walking, but my slight fear of heights makes it harder to deal with the exposure. On my last day of riding in Marquette I found myself on a trail called Gorge-ous which had enough exposure in spots to nearly induce a panic attack in me. It’s beautiful, but it snakes its way down the edge of a gorge up above the Carp River, and the drop-off would cause some serious problems. This photo shows one of the more exposed spots, complete with a repurposed truck mirror to allow riders to see around the corners (these are two way trails, remember).

I mostly enjoyed the blue square (intermediate) trails, as there was pretty much nothing on these I couldn’t ride comfortably. They were nice for just rolling around and seeing how beautiful the area is. When I’m up in Marquette the next time I’ll likely try out more of the black diamond stuff, but after being a bit thrown off by a technically difficult group ride on Wednesday evening I was playing it safe.

Group Ride

The folks at Sports Rack told me about a group ride at Al Quaal Recreation Area in Ishpeming on Wednesday nights at 6:30pm. Wanting to see some new trails I headed out for that. This ride apparently breaks into three groups (A, B, and C), and I made a mistake when I chose the A group. If/when I go back I’ll likely ride with the B group.

I’d heard that the A group was fast, and that Al Quaal was mostly XC ski trails with small amounts of single track. I’d also heard in the parking lot that the single track is about as difficult as the Blue loop at Marquette South, which sounded fine to me. I could ride hard on the wider stuff, then deal with the single track. This turned out to not be the case, the trails were some of the most technical and rocky that I’ve ever personally been on and I was in way over my head. There were numerous 8″ – 12″ rocky step-ups and climbs far beyond what I’ve ever ridden before and thus I walked quite a bit. For the part I rode there was actually very little XC ski trail, even though the climbs and downhills on it were quite fast and fun.

This held the group up a great deal, so after making my way through a bit of it I was going to head back early. Very kindly of them the group didn’t want to let me head off alone somewhere I hadn’t been before (even though I knew I could find my way back) so I kept on a bit further, before splitting off and heading back to the cars with someone who was cutting out early named Don. After this the group carried on to some other trails which apparently have considerably more exposure, including rocky ledges looking down at the tops of trees. I’m glad I didn’t carry on to this area.

(This technical loop seems to be partially labeled with pink signs indicating the Quaal Loop. It does not yet seem to be mapped.)

Later that evening I ran into two of the B group riders at Blackrocks who I had previously talked to in the lot, and that conversation confirmed that I was in over my head. It sounds like the B group would have been much more my thing… More XC ski trails, more single track but not things as hard as what the A group did. Whoops.

I just hope I didn’t squish the group’s plans too much. I definitely learned something that day, though.

Routes Ridden

In the three riding days in the Marquette area here’s where I went, as illustrated via Strava:

After Marquette…

After leaving Marquette I headed down to Glacial Hills in Bellaire. I’d heard of this trail for a couple years, and finally having the chance to ride it I wish I’d gone there sooner. This is incredibly flowing, quite easy (but fun) machine-built trail. I was amused that it was about the same difficulty as the Grom (Beginner / Kids) Loop in Marquette, but for almost 30 miles. It was a blast. (Strava data.)

Once I was done riding at Glacial Hills (mostly because the sun was setting) I headed to Traverse City and checked into a hotel, staying the night so I could attend an Iceman Out-and-Back ride put on by Einstein Cycles. This was a not-fast-paced-but fun ride from the shop out to Kalkaska, then back via most of the Iceman route. Due to pacing, stops to chat, and getting turned around on some of the newly cut trail segments we didn’t have time to do the full route, but it was still a good time. It was nice to spend some time in the northern Lower Peninsula riding as well; which is completely different from what’s found near home, and different still from Marquette. (Strava data.)

Photos

Photos from this trip to Marquette, including a couple along the drive and riding to and from there, can be found here.

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Vinyl Tube for Shimano Brake Bleeding

The Shimano XT hydraulic disc brakes on the Salsa El Mariachi Ti seem to need bleeding†, but one of the tools that I had to purchase before doing so was some vinyl tubing for the caliper end. I found that Watts Polyurethane Micro Fuel Line, 1/4″ OD x 1/8″ ID seems to fit perfectly. As pictured above the ID slips snugly over the bleed port on a Shimano brake caliper and both the ID and OD fit nicely on Luer lock syringe. At ~$5 for a 10′ roll at Home Depot one has to purchase much more than is needed for a single brake job, but it could easily be shared with friends.

† First symptoms were the brakes rubbing slightly after a sustained descent. Now they are rubbing for a brief moment after almost any use. I suspect there is air in the calipers and it’s heating and expanding, moving the pistons outward. Bleeding should address this.

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Ground Bees and Bench Cutting

 

Today I was reminded that bench cutting trail is incompatible with ground bees. After an excellent meeting with the Bald Mountain Recreation Area staff and start/finish planning for the Addison Oaks Fall Classic I headed out to River Bends to do some trail work. We’ve been building Lazy River, a new-ish section of trail designed to repair / replace what was lost when ITC cut a corridor to replace an eroding high tension power line tower.

One portion of this trail segment is a flowing, switchbacky downhill followed by a short, but slightly punchy climb. To make this roll nicely it needs to be bench cut, and with last night’s rain I figured it would be a great time. Despite being hot and mosquito-y, everything was going great… until I hit the bee nest. Suddenly the bees began flowing out of the ground and I got stung while running away. A few run-by passes to collect my tools and I decided the day’s work was done.

This unfortunately means that about 12′ in the middle of the trail has been left unbenched with some nicely churned soil right in the middle of the nice line. Hopefully I’ll be able to get back to it another day soon, armed with something to handle the bees.

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Leaky Continental Race King (Protection 29 x 2.2)

Ever since building wide carbon fiber wheels for my El Mariachi Ti I’ve had quirky issues with the rear wheel holding air. The front, with a Schwalbe Racing Ralph, has been fine, but the rear with a Continental Race King (Protection, 29″ x 2.2″) would be unexpectedly flat. After two rapid-succession low pressure events at Stony Creek yesterday and an attempt at fixing the tire last night, it was still leaking. Today I decided to try a new rear tire; a Specialized Fast Track Control 2.2″. The new tire seated up quickly without soap, and some Orange Seal tire sealant has it holding air nicely. Unlike the Continental Race King…

From my second ride on the Race King I’ve had issues with the tire losing air, to the point where I would find it dead flat after sitting overnight. After adding more sealant helped, but I noticed a clear liquid (the carrier for Stan’s sealant?) leaking out of the tire along the edge of the rim as it sat, making the bead constantly appear wet. I’d put more Stan’s sealant in it a few days ago, then during yesterday’s ride at Stony Creek I was barely able to go five miles without the tire being so soft that I could hit the rim on flat ground. Reinflating the tire and shaking would seal it up, but then it’d begin leaking again.

Last night I pulled the tire apart to replace the tape and sealant, this time with Orange Seal, and the tire seemed sealed until this morning, when I found a small pool of clear orange liquid beneath the tire (photo). After picking up a new tire today I washed everything off to take a serious look at what was going on. This showed a slice-like mark along part of the bead on the drive side of the tire, with the most heavily cut part being where the tire was leaking most heavily. When first installing the tire I noticed that this part looked a bit threadbare, but I didn’t think it was actually going to be a problem. Apparently it was. The cut can be seen above (or here) and has a corresponding ridge of latex built up on the inside of the tire as sealant permeated through this area (photo).

Because this line directly matches the edge of the rim, I suspect that some of the damage is from riding the tire at low pressures, which may explain why the problem seemed to compound: more low pressure events resulted in more inadvertent hitting the rim, resulting in more places to leak. Since the bead was wetted from my second ride, I believe this started with the threadbare area that I’d initially noticed and compounded from there.

As with the Schwalbe Racing Ralph on the front wheel, the Specialized Fast Trak that I installed today seems to have a good deal more rubber on the bead area than this tire did, so I hope it fares the same as the Schwalbe and just works. I’m getting tired of having a bike whose rear wheel isn’t reliable…

(The biggest downside thus far to the new tire is that it’s 4mm narrower than the Race King. I really liked the Race King’s generally smooth triangle pattern and huge volume, so going to something else is a bit displeasing. The Race King has loads of traction, grabbed nicely on pretty much every surface I’ve ridden, but was still super smooth when on dirt roads or the occasional paved routes. The Fast Trak seems to roll smoothly in the basement and the tread pattern looks promising, so I’m willing to give it a go. This review from 2012 is quite favorable as well. Maybe there’ll be a little more side knob traction than on the Race King as well…)

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