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
It is a Shimano spindle.
With Schwinn cups
And the same bottom bracket flipped 180.
Top view
One-piece to three piece crankset bottom bracket 122mm. Used, $25.00
This will let you put a three piece crankset on a bike made for a one-piece Ashtabula-style crankset
And here's a close-up
End view
And here it is flipped around