The Shimano XTR FC-M9125 crankset features a lightweight and rigid design thanks to Hollowtech II crank construction. Chainrings can be easily exchanged with the direct mount system and one key release.Single front chainring set up (chainring not included)Crank can be exchanged between single and double front chainring set upsLight and stiff desginChainrings are easily exchangeable with the help of the direct mount interface and one key releaseQ-factor: 174mmChainline: 55mm