bc1.37 bb question

Discuss light weight issues concerning road bikes & parts.
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urbanspaceman
Posts: 20
Joined: Thu May 25, 2017 7:05 pm

by 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
Posts: 441
Joined: Thu Mar 31, 2016 10:32 am

by 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.
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bikerjulio
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Location: Welland, Ontario

by 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 Image

The difference Image

FSA and others make cups Image
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jobvisser
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by jobvisser

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

AZR3
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Location: Az USA

by 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.

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sugarkane
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by sugarkane

jobvisser wrote: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

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havana
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by havana

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

by Attermann

havana wrote: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?

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sugarkane
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by sugarkane

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

by Weenie


urbanspaceman
Posts: 20
Joined: Thu May 25, 2017 7:05 pm

by urbanspaceman

Thanks for the help guys. Problem resolved :)

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