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Time to build a 27.5″ wheeled mtn frame

May 28th, 2008 Hugh

I haven’t really had an opportunity to build a mountain bike around Kirk Pacenti’s 27.5″ mtn bike tires. These tires mount on a 650b rim. The overall wheel size ends up being half way between a normal 26 inch wheel and a 29 inch wheel. I am going to try to build Christine a combo style of bike. She needs a bike for commuting and for trail riding. I have designed the bike so it will handle properly as a commuter with a 650b X 38c tire or as a rigid mtb with the 27.5 inch tires. The BB height is critical and can be adjusted accordingly with the eccentric bottom bracket.

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The frame is being built out of True Temper Platinum tubing. I am not sure what the final paint scheme will be. So far a brown/pink combo seems to in the running.

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For years I have dreaded reaming seat tubes. I never really seemed to have an efficient system that didn’t require a huge amount of elbow grease. A little while back I found a number of 1.5 hp motors with gears boxes attached and thought that some day I might have a chance to use them for a reaming machine. My friend Wheelspinner put this machine together for around $200 and a couple of afternoons of work. It works like a dream!

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What’s happening at TN

January 18th, 2008 Hugh

I am working on a couple of cool bikes now. First is Nics Ti 29er frame. It is turning out perfectly.

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I am also working on an interesting frame/bike for the Toronto International Bike Show. It will be based on 650B size wheels, disc brakes, and an eccentric BB. The EBB allows the bike to very versatile. It can be setup singlespeed or fixed, geared or internally geared. The EBB allows a person to tension the chain without having to move the wheel position wrt the fenders and disc brake.

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