bc1.37 bb question

[urbanspaceman]

Hi there. I have a Cervelo P2 with a “bc1.37 x 24” bottom bracket.

Is there any way to get a 30mm crankset through it?

Thanks in advance

[2lo8]

You mean BSA?

If you get a BSA30 crank and BB, or a BSA 368 crank and BB it should fit. Forget trying to fit a normal BB30 crank in though.

[bikerjulio]

To expand.

Your BB now is a English threaded one, also called BSA.

A "long" spindle BB30 crank will work with the correct threaded cups. You will then have a setup also known as BB386evo.

FSA, Rotor and others make these cranks but as the poster says a conventional BB30 crank will not fit.

Here is such a setup

The difference

FSA and others make cups

[jobvisser]

you are better of just using a 24mm or 22mm

[AZR3]

I have a 2011 Cervelo S3, which is also has a BSA threaded bottom bracket, and I've been using a wheels mfg BSA30 bottom bracket and a Rotor 3D+ crank. I have over 10k miles on this setup and it's been solid, no reason to not use a 30mm spindle crank.

[sugarkane]

you are better of just using a 24mm or 22mm

And why is that?


I have 2 bikes with bsa bottom bracket and 30mm quarqs both have the bsa30 bottoms brackets from Kogel

[havana]

It's never going to be very durable because the bearings are quite small.

[Attermann]

It's never going to be very durable because the bearings are quite small.

They sit outside the frame, so why they make them smaller?

[sugarkane]

exactly they are full sized 6806 bearings as found in all pf30, bb30, evo386, osbb, pf30a and BBright

[urbanspaceman]

Thanks for the help guys. Problem resolved