#1
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Fixed gear wheel build (converted disc hub)
I wanted to document this project for posterity. Check back as it unfolds!
Back story: I managed to strip the threads off both sides of my Nashbar track hub in the space of a few months. One set of stripped threads was my fault: I neglected to re-tighten the lockring a few days after installing a new cog. The second set somehow stripped after the chain popped off on a very steep downhill. Regardless of how it happened, I have lost faith in threaded track cogs. The solution is to build a new rear wheel with a converted MTB disc hub. This idea has been around for a few years, but for some reason it hasn't caught on more: (pics from Velo Solo) I'm using a Shimano Deore XT M-756 front disc hub. This hub has symmetrical flanges, a 6-bolt disc mount, loose-ball bearings (preferred for routine overhauls), and pretty good seals. A Wheels Manufacturing 10x1x137mm quick release axle, 20mm of axle spacers, and a Velo Solo 3/32" x 17 tooth cog are the parts necessary for the conversion. The axle will be cut down to 130mm so I can use it on my 120mm-spaced Steamroller (a Surly Tuggnut allows me to use a quick release on my fixed gear). This will all be laced into a Salsa Delgado Cross rim. Converting the disc hub should be simple: disassemble the hub, replace the 110mm axle with the 130mm axle, re-install the cones, install new axle spacers (15mm on non-drive side, 5mm on drive side), and re-install locknuts. After building the wheel, the new cog simply bolts on with 6 disc rotor bolts. Here are the anticipated dimensions of the converted hub: Over-locknut dimension: 120mm Flange diameter: 61mm Center to left flange: 26.1mm Center to right flange: 26.7mm Chainline should be 46mm, which matches perfectly with the outer position on a road crank. I'll post step-by-step photos once everything arrives. Thanks for looking! Last edited by keevon; 10-24-2011 at 04:26 PM. |
#2
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clever idea
cheers
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Life is perfect when you Ride your bike on back roads |
#3
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Cool! Good luck with the project.
Tomicog http://tomicog.blogspot.com/ makes cogs in America. I use my Tomicog on my offroad fixie, never had any problems. Then again I have a bunch of thread on surly/phil wood fixed... hubs that have worked just as well. |
#4
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Quote:
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#5
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I like it...... Simple. Effective and practical. You can't go wrong with an xt hub it's like the Abrams tank of the mtb world.
~D
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Carnot,Citric Acid, Bi...... |
#6
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It's not DIY, but the White splined system is also a really nice way to go.
Have fun with the conversion! |
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