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Hi, Nate Taylor here. Please reach out to me at nate@sscycleworks.com for inquiries on parts availabilities and shipping estimates.

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 | 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.

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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

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C MX-3 A12 One-piece to three-piece conversion spindle, 130mm. New, $25.00/each

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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.