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Category: cycling

New Single Track at River Bends

I’ve been on vacation for the last week or so (since the 3rd), and much of this time has been spent working on a new 1.3 mile segment of single track trail at River Bends. As of this afternoon it is now signed and open and can be considered complete. All work on this segment from here on out will be tweaking or maintenance; initial building is done.

The image above shows the entrance to this new segment. This spot had previously been a wall of brush, best illustrated here at the end of a trail ride video from River Bends where the rider turns left after exiting the single track. Now riders can continue straight and ride another long segment of twisty single track. This takes the place of riding some relatively flat two track which had a couple unpleasantly blind corners. An updated copy of the River Bends Trail Map (PDF) shows this new segment of trail, the eastern yellow line which flows north between the asphalt and two track.

While I did a fair bit of work on this trail segment laying it out and doing a bunch of the rough cutting and such, it would not have been possible to build this without loads of help from other volunteers. Some folks (in particular Jeremy Verbeke and Paul McAllister) were able to help out in the middle of the week, while others donated their time and effort during a scheduled trail day on October 9th where our numbers (21 people!) allowed us to finish most of the work resulting in something recognizable as a trail.

Thank you to everyone who was involved with this; we’ve got more trail!

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Burchfield Time Trial

Early yesterday morning I headed out to Ingham County’s Burchfield Park for the first Burchfield Time Trial. Despite being almost two hours away I figured it’d be a fun time, and it was. The trail was a mixture of Tree Farm-esque twisty single track with lots of roots, more flowing sections through the woods, and lumpy grassy trails through fields. There’s also a couple super-nifty areas that wind right along the banks of the Grand River. Weather started out cold with temperatures in the upper 30s when I arrived at the park, but by the time we started it’d moved up nicely to the mid 40s, and finished around 50. Insulated knickers, a base layer, a short sleeve jersey, toe covers, and medium weight gloves were perfectly comfortable for this, and the only thing I had to change was pushing my sleeves up while out in the sun in a field.

After reading a bit about the trail and getting input from some folks I took my rigid single speed Salsa El Mariachi to the race, and for the most part this was the perfect bike for there. The grass field areas were a bit rough, and lacking the ability to shift gears I was a bit slow on the flat sections, but it was still fun. In the end I placed 15th out of 18 (with 5 DNFs) in Class A, which was the geared or ss, sport or expert class. Had I pushed a little harder and cut only 30 seconds off my time I would have moved up two places.

The awards for the race were also really nice. Each was an 18T cog stuck in a slot cut into a birch log with a finishing place decal applied to the cog, hand-made by one of the people who’d worked on the race. These were a great alternative to the traditional medal.

The photo above was taking near the top of one of the longer hills, a mile or two before the end of the race. Here is another one of me from the same spot, taken slightly before this one. I’m not quite sure who took the photos, but they were posted here on Photobucket under the username DeadTreeRun. I particularly appreciate that they offer the full res photos for download without charge.

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Kenda Slant Six

A few days back I got a good deal on a pair of 29″ x 2.2″ Kenda Slant Six tires. I’ve been interested in these since they came out over a year ago, and finally having a chance to try them I first put one on the rear of my single speed Salsa El Mariachi. Trying this out on a quick pre-rain ride at River Bends last night I found it to be a very nice rear tire; a bit grippier than the Small Block Eight that it replaced, but without any notable additional rolling resistance. Being much better in greasy corners than the SB8 and a nice compliment to the 2.4″ old-style Schwalbe Racing Ralph (now this tread pattern is called the Rapid Rob) I think I’ll leave it on there for a while. I might even fit one on the back of the Titus once I’ve got its rear wheel working correctly again. (It broke another spoke this past weekend and is desperately in need of a rebuild.)

The only downside I can see to this tire is that at 700-some grams it’s fairly heavy, although I’m not too concerned about weight and don’t notice this very much. It’s also got rather pitiful graphics and a 90s throwback .com branding, but this is forgivable as it works well.

(These are mounted on the Salsa Semi-based wheels that I built up in April. This nicely wide rim has worked out really well this summer.)

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Logpile!

Here, have a photo of the newest addition to the trails at River Bends: a log pile. This has been in place for a few days, but this afternoon I finished it off by adding another log to the front to make it more approachable. I also added more glue dirt to help keep it all together. Another view of the logpile (from the direction which it is typically ridden) can be seen here. At River Bends when the parks people cut downed trees from the two track, they tend to leave nicely maneuverable ~4′ pieces sitting in the woods along the trail. Finding a few fresh, non-rotted ones of these is trivial and they can easily be used to build solid log piles. For anything else I can find other fallen, dead trees and cut them to length with a handsaw.

This afternoon’s trailwork also included tweaking a corner to increase its radius (photo) and adjusting another to flow more smoothly to cut down on people overshooting the corner and washing out. Damage to both the trail surface and edge made it obvious that this was a common problem on these corners. Here is a helmet cam video of me washing out on the pictured corner and falling. Whoops.

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World’s Largest 555 Timer?

This traffic control device (which is essentially a timer) may just be the world’s largest 555 timer.

This was seen at the corner of 22 Mile and Shelby Roads while on a bike ride this evening. I headed from home, up to River Bends, out the back part of it, over through Clinton River Park Trails (which were rather muddy), and then wound through neighborhoods back towards home. Total of 22.3 miles in 1:44:27.

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Doughnuts at Paint Creek Cider Mill

…just a quick photo from yesterday’s impromptu bike ride from when we stopped at Paint Creek Cider Mill and split a bag of cinnamon sugar doughnuts about 30 miles into riding. As Nick said, due to five people being present and a dozen doughnuts in the bag, a few of us had to “take one for the team” and eat three… Mmm…

Yesterday’s weather could have been a little nicer as sprinkling rain was a little was a little unpleasant at times, but otherwise it was a nice cool autumn day. I’m really looking forward to a couple months of this type of ideal riding weather.

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River Bends Trailhead Kiosk: Complete

This morning, along with help from Jeremy Verbeke and Scott Retford (and Bob Costello last night in collecting the Lexan) the kiosk at the River Bends Trailhead was completed. This involved hanging the signs, covering it all with Lexan, and fitting some wooden strips that I cut and drilled last night (picture). Here is a photo of Scott and Jeremy standing next to the kiosk right after we completed the sign hanging.

This kiosk (along with much of the trail signage) was donated and build by Spencer Wood and Troop #242 as part of Spencer’s Eagle Scout project. It’s a nice improvement on the standard MMBA Kiosk Construction Plans, is extremely well built, and should last for years. This is one of the best constructed trailhead kiosks that I’ve seen.

The signage includes a trailhead-specific version of the map, a QR code allowing easy download of a PDF of the map to one’s smart phone, and some basic trail rules. The kiosk also features a sign from Aktion Club, a Kiwanis program for people with disabilities who helps with maintenance of the first mile of two track trail.

This completes the current River Bends trail system allowing us to move on to the next phase. I just recently received approval to expand the single track even further, so once the mosquitos start dying off and leaves start falling from trees construction on this next segment can begin.

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Garmin Edge 500 Distance Aliasing Issues Alleviated By GSC 10 Sensor

Past experience with wildly varying data has prevented me from trusting GPS-based devices for accurately logging distances while riding mountain bike trails, but after hearing reassuring reports of modern units and seeing how useful it could be to have one unit logging data for all three of my bikes and automatically aggregating it I decided to give it a go. I purchased a Garmin Edge 500 cycling computer and a GSC 10 wheel speed / pedaling cadence sensor a month ago and after beginning to use it things seemed quite accurate, but I continued to be a bit suspicious that it may not be providing as accurate of data as it could. So, I decided to do some tests.

The results of these tests have shown that when the Edge 500 is used in conjunction with the GSC 10 it is just as accurate as a wheel-based computer and can be relied on to provide sufficiently accurate distance measurements while riding curvy mountain bike trails. Coupled with all the extra data that the system can log (heart rate, location, temperature, cadence, etc) it’s quite a nice system for recording data.

Without the GSC 10 (using only GPS-based data recording) the Edge 500 showed drastic undermeasurement, 20.70% on a typical Southeast Michigan trail ride and 33.87% in a worst-case test scenario.

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Broken Spoke II

Today I broke another spoke; the same one that was quickly fitted as a replacement before the Hanson Hills XC race by a guy from Grayling’s The Bicycle Shop. I guess 2.5 months of riding on a quick (and much appreciated) fix isn’t too bad. The wheel is wobbling a bit so I won’t be riding this bike until I can get it fixed up.

I was surprised by how it broke. Much like the last time I was riding along pretty trivial single track, a short and relatively smooth uphill section at Stony Creek and not going over anything more difficult than a front lawn. Suddenly I heard a BANG sound, stopped to look at the wheel, and saw one end of a spoke hanging into the center near the hub.

Oh well, that’s life I guess. I can’t complain too much, as I’ve got at least 2466 miles (likely more, as not all were logged) on these wheels. I’ve got some 291mm spokes here from building up a wheel set back in April. DT Swiss’ Spoke Calculator is recommending a 293mm spoke, but hopefully I’ll be able to make do with something 2mm shorter.

UPDATE: The replacement spoke did the trick. Wheel’s held up for ~30 miles thus far.

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