Priekinis žvaigždžių blokas Shimano 105 FC-R7000 172.5MM 2x11-speed

High end Shimano 105 FC-R7000 HOLLOWTECH II Crankset for 11-speed drivetrainBottom bracket is not included!Balances weight and efficiency without sacrificing stiffnessRider Tuned performance with numerous gear combinationsWider gear pitch increases chain clearance with small gearings and allows for 410 mm chain stays on 135 mm O.L.D.Optimum power transferMultiple options provide greater choiceGreater frame compatibilityChain ring combination (OPTIONAL): 50x34T OR 52x36T OR 53x39TWeight (170mm):713.4 g (50-34T) 742.6 g (52-36T) 757.8 g (53-39T)HOLLOWTECH II TechnologyCompatible chain HG-EV 11-speed/ HG-X11Crank Arm Length: 172.5 mmGear arms 4BCD (Bolt circle diameter): 110 mmThreaded BB Shell Width: 68mm, 73mm, 70mmIncludes crank fixing boltQ-factor: 146 mmAnodized aluminium crank arms and inner chainringAluminium and glass-fibre reinforced polymer (GFRP) outer chainringSteel axleHOLLOWTECH 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.HG-X11 - directional chain realize more smoother shifts and greater overall performance. Right and left sides are optimized for front and rear shifting respectively.