Crank arms Shimano XTR FC-M9100-1 175MM 1x11/12-speed

SHIMANO XTR FC-M9100-1 HOLLOWTECH II crank arms for 1x11 and 1x12 drivetrains. FC-M9100 is ideal for Cross Country and Marathon use. Chainring and bottom bracket are not included!Smoother driving even over bumpy terrainLighter and stiffer design and easy exchangeable chainring by direct mount and one key releaseExchangeable of single and double chainring by direct mountQ-factor: 162 mmChainline: 52 mm Crank arms legth: 175 mmWeight: 511 gCompatible chain CN-M9100Includes crank fixing boltGear arms 4 armHOLLOWTECH IIP.C.D.: DirectRear speeds 11 (Wide flange) / 12Threaded BB Shell Width 68mm, 73mmAnodized aluminium crank armsSteel axleCompatible chainrings:ISMCRM95A0 Chainring 30T (SM-CRM95)ISMCRM95A2 Chainring 32T (SM-CRM95)ISMCRM95A4 Chainring 34T (SM-CRM95)ISMCRM95A6 Chainring 36T (SM-CRM95)ISMCRM95A8 Chainring 38T (SM-CRM95)HOLLOWTECH II - Providing the best balance of stiffness, strength, weight and rotating performance The concept of HOLLOWTECH II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, SHIMANO strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. HOLLOWTECH technology is an ultra-lightweight hollow crankarm created by SHIMANO with the company’s own proprietary forging technology that also maintains rigidity. The addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket (sold separately) bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness and rotating performance in a lightweight and beautiful crankset design. Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.