Today I’m finishing up a pair of frames for returning customer Spike. He’s having me build both a 26″ and 29″ MTB both with the exact same fit profile.
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Would it be possible to build a bike that could interchange 26 and 29 inch wheels? With rigid front forks, Puglsey or Karate Monkey style.
I’m sure it is although I’ve never done it. The one thing that you’d have to watch out for is BB height. I think it would be compromised at either end the tire size difference.
I have put a few thousand miles on a road bike converted to 26″ wheels, as you have described.
Needed a wider tire for commuting my Clydesdale self and enjoyed the handling of the lowered
center of gravity. But, Carl is correct about BB height. It is actually a safety issue, since you can inadvertently plant a pedal at speed in a curve and get dumped. If you were in the dirt, the lowered BB gives you a chance to trap a big toe between the pedal and an obstacle. Broke a toe this way, as a kid.
If you choose to setup a bike as you describe I would put a lot of thought into the BB height and would use shorter than usual crank arms. You might not be happy with the compromises, but then you might.
Carl is building up a 700cc commuter for me, that takes into account the above experience.
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