{"id":4401,"date":"2012-07-27T17:37:39","date_gmt":"2012-07-27T21:37:39","guid":{"rendered":"https:\/\/nuxx.net\/blog\/?p=4401"},"modified":"2012-07-27T17:39:35","modified_gmt":"2012-07-27T21:39:35","slug":"functional-mukluk","status":"publish","type":"post","link":"https:\/\/nuxx.net\/blog\/2012\/07\/27\/functional-mukluk\/","title":{"rendered":"Functional Mukluk"},"content":{"rendered":"

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After the ill-executed (but fun) beach ride a couple weeks ago<\/a> the Mukluk<\/a> was in serious need of some work. Specifically, I needed to replace the seized bottom bracket bearings<\/a> and fix the lower derailleur pulley, and I also wanted to replace the becoming-worn middle chain ring as a bunch of chain suck during the beach ride kept me in the granny gear.<\/p>\n

By picking up and assembling some tools (a blind bearing puller and a bearing press assembly) along with the required parts I was able to get all the affected bearings and chainring replaced, and I also swapped out the chain for a standard SRAM PC-991. The Mukluk had come with a KMC Z99 Rust Buster<\/a> galvanized chain, and while it initially seemed nice I begun wondering if it’s rough surface was contributing to chainring wear.<\/p>\n

The replacement chainring is a cheap (~$10) Truvativ<\/a> ramped 32 tooth steel middle chainring to replace the stock e*thirteen<\/a> part. While a bit heavier than the alloy model, I suspect that the steel ring will last quite a bit longer than the alloy one did, even when riding in potentially icky conditions. If it doesn’t, at least it was only $10.<\/p>\n

A quick ride at River Bends this afternoon ending in rain showed that everything is working nicely, so hopefully everything’s in order for riding the bike as part of a fatbike-only team at tomorrow’s Tree Farm Relay<\/a>.<\/p>\n

Here’s some photos of various steps of this work:<\/p>\n

· The e*thirteen bottom bracket after removing the bearings with a blind bearing puller. Conveniently this bottom bracket uses 6806-2RS bearings, the same size as BB30.<\/a>
\n· Detail of the 6806-2RS marking on the bearing from the e*thirteen bottom bracket. This one seized up after a ride along the beach and in some fresh lake water.<\/a>
\n· KML-brand 6806-2RS bearings to replace the seized bearings in the e*thirteen bottom bracket. These are BB30-size bearings.<\/a>
\n· Bearing press made from some eBay-purchased dies, threaded rod, washers, and nuts. Bearings are also shown.<\/a>
\n· Home-made bearing press before pushing the BB30 (6806-2RS) bearings into the e*thirteen bottom bracket cups.<\/a>
\n· KML 6806-2RS bearings (BB30-size) pressed into e*thirteen bottom bracket cups. This went very smoothly.<\/a>
\n· e*thirteen XCX crankset test fit with the newly-installed bearings. Everything aligned nicely.<\/a>
\n· Lower SRAM X9 rear derailleur pulley after pressing in a new 626-2RS bearing. This cracked the inner ring of the pully, but appears well seated and spins smoothly so hopefully will remain usable.<\/a>
\n· New SRAM PC-991 chain and steel Truvativ Trushift chainring (104 BCD, 32 T) on the e*thirteen crankset.<\/a><\/p><\/blockquote>\n

For reference, here’s the specialized parts that were used:<\/p>\n

· e*thirteen Bottom Bracket Bearings: 6806-2RS (Same as BB30)
\n· SRAM 2011 X9 Lower Derailleur Pulley Bearing: 626-2RS
\n· BB30 Installation Drivers purchased from eBay seller mtbtools<\/a> with threaded rod from Mid-States Bolt and Screw<\/a>.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

After the ill-executed (but fun) beach ride a couple weeks ago the Mukluk was in serious need of some work. Specifically, I needed to replace…<\/p>\n

Continue readingFunctional Mukluk<\/span><\/a><\/div>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-4401","post","type-post","status-publish","format-standard","hentry","category-cycling","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/4401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/comments?post=4401"}],"version-history":[{"count":5,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/4401\/revisions"}],"predecessor-version":[{"id":4406,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/4401\/revisions\/4406"}],"wp:attachment":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/media?parent=4401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/categories?post=4401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/tags?post=4401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}