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Specifying Chainstay Length To Get Perfect Chain Tension


Tommy d

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[background story: My frame snapped today, need a new one, considering a custom steel frame as an option for my replacement frame.]

I'm in need of a new frame and I don't want to have the vertical dropout + tensioner setup that I've been running, because I keep on landing on the tensioner and breaking the mech hanger (N)

I could just get horizontal dropouts, but I'd rather not because of the fuss every time you take the wheel out/put it back in.

My question is, is it a feasible solution to build a frame with vertical dropouts where the length of the chainstay is designed exactly so that the chain fits perfectly on the cogs without needing something to tension it? I know I'll be running 22t front and 18t rear so theoretically this should be possible? Anybody tried it? Does chain stretch mess it up or is that too small a difference?

edit: whoops this was meant to be in Trials Chat, not sure how it ended up here.

Edited by Tommy d
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