[pyro_]

Wondering if anyone has run a shimano cx70 crankset on their mountain bike? Was there any issues with fitting it? Considering this for a 2011 stumpjumper with pf30 BB

 

[Slash5]

As long as the narrow Q factor and chain ring clearance will work, I don't see why not. You need to measure for that.
You will need the correct adapter and shims to convert the PF30 to the 68 mm wide by 24 mm spindle. Your front derailleur will need to be mounted high enough and you will need to play with the limit screws.

 

[Procter]

Which stumpjumper? If you have a fsr with direct mount front derailleur I'd be worried whether it will mount high enough for big ring.

 

[pyro_]

It is a comp carbon HT