What BB and crank set

[Pointer]

Hubbers, I need some help.

 

I have a Specialized S-works Stumpjumper HT 2010 model and Im running a 2x10 setup with Rotor 3D crank set.

 

I want to convert to 1x11. It's about time I think.

 

After lots of questions I now know that I can not use my existing crank for the 1x setup.

 

How do I know what BB I have so that I can get the correct crank.

 

I am not looking to go with Rotor again as the Rex cranks are a bit on the expensive side for my budget at this moment.

 

thanks

[_im_from_earth]

What BB standard does your frame use? If its the same as this then looks like a Shimano BB-91? http://www.specialized.com/us/en/bikes/archive/2010/stumpjumper/s-worksstumpjumpercarbonht29erframeset#specs

[Pointer]

What BB standard does your frame use? If its the same as this then looks like a Shimano BB-91? http://www.specialized.com/us/en/bikes/archive/2010/stumpjumper/s-worksstumpjumpercarbonht29erframeset#specs

It is that frame yes.

 

What Crank will I be able to use? BB30, GXP?

 

Thanks

 

Just read somewhere on the net that I will not be able to run any SRAM craks with the BB-91.

 

Is that true?

[raptor-22]

No you are able to use gxp cranks with bb91