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One-piece to three-piece crankset bottom bracket conversion kits

On this page: Shimano/Schwinn 122mm spindle conversion set | 122mm spindle conversion set

These conversion sets will allow you to mount a three-piece cotterless crankset on a bike that was made for a one-piece Ashtabula-type crank.


One-piece to three piece crankset bottom bracket, Shimano/Schwinn, 122mm. Used, $50.00

Shimano conversion kit

It is a Shimano spindle.

Conversion kit

With Schwinn cups

Schwinn conversion kit

And the same bottom bracket flipped 180.

Schwinn convertable bottom bracket

Top view


One-piece to three piece crankset bottom bracket 122mm. Used, $25.00

Bottom bracket conversion set

This will let you put a three piece crankset on a bike made for a one-piece Ashtabula-style crankset

Bottom bracket

And here's a close-up

Bottom bracket conversion set

End view

one-piece to three-piece bottom bracket converset kit

And here it is flipped around