One-piece to three-piece crankset bottom bracket conversion kits
On this page: 122mm VP spindle conversion set | 130mm C MX-3 A12 conversion spindle | 131mm VP conversion spindle | American 1-piece to European 3-piece BB converter kit
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 VP 98.3, 122mm. Used, $25.00
This comes with the spindle and races.
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
C MX-3 A12 One-piece to three-piece conversion spindle, 130mm. New, $25.00/each
VP 215H One-piece to three piece conversion spindle, 131mm. Used, $10.00/each
Made by Taiwan parts maker VP
Here's one side
Here's the spindle rolled over to show its other side.
American 1-piece (Ashtabula) to European 3-piece bottom bracket conversion. Used, $20.00
Installing this kit in a bike made for a 1-piece crank allows the use of a 3-piece bottom bracket.
This will bolt into the bottom bracket shell allowing the installation of a 3-piece bottom bracket.
End view, showing one of the bearing surfaces.
A more straight-on view
Here's the other end.