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widest possible front fork
Hello,
I have bought some motors having 120mm axle length - and desperately searching some fork which fits... thankx hyperbike.cc sorry for reposting - my old one diappeared |
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#2
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widest possible front fork
g.fried wrote:
I have bought some motors having 120mm axle length - and desperately searching some fork which fits... Try China. Yours is a common compatibility problem between Chinese-market hub motors and US-market bikes, which almost without exception have 100mm spacing on the forks. The cheap and simple way to cope is to bend a normal bike fork to a wider spacing. If the fork is of the "unicrown" type with vertically parallel blades, you probably won't have a clearance problem between the fork legs and motor housing. Otherwise, you could have a custom framebuilder make something for you, which cost at least $300 the last time I looked into it. One major advantage to a fully custom approach is that you can have the framebuilder provide thick, sturdy plate fork tips that won't be pried open by motor torque at the axle. The Surly Pugsley fork (not cheap) has 135mm spacing, but it's off center, with the extra 35mm all on one side. Trying to make do with one of those would mean having to offset the rim of your front wheel by 17mm, which would make the wheel much weaker and less reliable. Chalo |
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