I've Not Fitted a SRAM MTB BB30 Crankset Before ...

Discuss light weight issues concerning mountain bikes & parts.

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Valbrona
Posts: 1629
Joined: Fri Oct 28, 2011 3:25 am
Location: United Kingdom of Great Britain and Northern Ireland

by Valbrona

The crankset is coming from half way around the world and may not arrive with instructions and/or all of the parts.

Am I right in thinking I need two 2.5mm BB30 spacers (one each side) and a SRAM 13mm spacer for the DS? It is a BB30 crankset going into a regular BB30 shell. I already have FSA BB30 bearings and shields fitted, and assume the FSA bearing shields will be okay despite them being rather thick.

And having never fitted a SRAM BB30 crankset before I believe there is a collar to take up play instead of the simple wave washer arrangement. So what's this about then?

Any advice appreciated. Thanks.

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rgkicksbutt
Posts: 465
Joined: Thu Aug 31, 2006 4:58 pm
Location: Ontario, Canada

by rgkicksbutt

Depends on what model of SRAM crankset, and if you have a 68 or 73 mm frame.

Once you know that, check out the SRAM tech docs, they lay it out pretty clearly.

https://www.sram.com/service/sram/258

Yes the collar is to take up play instead of a primitive wave washer system. Make sure you turn it the right way (the + sign) and tighten it up properly.

Valbrona
Posts: 1629
Joined: Fri Oct 28, 2011 3:25 am
Location: United Kingdom of Great Britain and Northern Ireland

by Valbrona

rgkicksbutt wrote:Depends on what model of SRAM crankset, and if you have a 68 or 73 mm frame..


Strange. The only BB30 standard I've seen is 68x42.


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