Sram XX crank Q factor - 156 or 166 for Sworks Stumpy?

Discuss light weight issues concerning mountain bikes & parts.

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by VTBike

I have a 2006 Sworks Stumpjumper (dual suspension, 120mm travel); and want to slap on some XX 2x10 cranks. Not sure about the q factor sizing though. Is there a size that fits or does not fit? How do I figure that out?

Thanks for the help

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by socratease

Almost all full squish bikes will require the wider ones. Sram has measuring instructions, however, if you want to try and get the narrow ones.

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by tonytourist

I ran a 166 on my 08, chainring clearance with a 39/26 was close to the chainstay, a 42/28 would not have worked.
Good luck! :thumbup:

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by VTBike

Thanks guys, perfect info.

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by dynaserve

The 156 should fit (it fit my epic), but the heel clearance will be to low and you will probably catch the rear stays.

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