Upgrade to both 10 speed and a 2x10 drivetrain at the same time. And while you're at it, enjoy the best mountain drivetrain ever made: XTR M980. Kit include all the components you will need for a complete upgrade.
The crankset with this kit is a 26/38T however you will need to select the length either a 170mm or 175mm and your front derailleur size: Top Swing Clamp, Bottom Swing Clamp or D-Mount (high direct mount) or E-type (low direct mount). The bottom swing and top swing clamps work on either 31.8 or 34.9 seatpost diameters, while the direct mounts bolt directly to the frame. Please let us know what sizes you need in the comments section of your order. If you are not sure about your front derailleur size, please email us or call at 800-627-6664.