Priekinis žvaigždžių blokas Shimano XTR FC-M9120-B2 Boost 38-28T 175MM 1x11/12-speed

SHIMANO XTR FC-M9120-B2 HOLLOWTECH II cranksets for 1x11 and 1x12 boost drivetrains. FC-M9120 is ideal for the use at Enduro and Trail bikes. Bottom bracket is not included!Combine wide range and close gear stepsAlloy inner chainring is installed with outer chainring by boltsNew drive systemSpecial gear teeth profile designed for MTB riding usageCrankset can be used as common componentQ-factor: 168 mmChainline: 51.8 mmFaster accelerationSmoother driving even over bumpy terrainLighter and stiffer design & easy exchangeable chainring by direct mount and one key releaseExchangeable of single and double chainring by direct mountWeight: 616 gChain ring combination: 38-28TCompatible chain CN-M9100Crank arms legth: 175 mmIncludes crank fixing boltGear arms 4 armHOLLOWTECH IIP.C.D.: DirectThreaded BB Shell Width 68mm, 73mmAnodized aluminium crank armsSteel axlePlated aluminium chainringsChainrins:Y1X228000 Chainring 28T-BH for 38-28TY0G898010 Chainring 38T-BH for 38-28THOLLOWTECH 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 & 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.