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what is the best way to adjust mtn bike frame rear hub spacing for conversion to 3-spd coaster brake rear axle? Answered


looking to build a 3-spd coaster brake chopper with steel mtn bike frame. Need to reduce rear axle spacing from 135 mm to 120 mm to accommodate the new wheelset. How?

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Re-design

8 years ago

you need to find 2 spacers 7.5 mm wide to fill the space between the frame and the hub.. A bike shop may have it or you may find it at a hardware store or you may have to have it cut at a machine shop.