
Блок передних звезд Shimano DURA-ACE FC-R9200 172.5mm 2x12-speed 54x40T
TECHNOLOGIES
HOLLOWTECH II -The guiding principle of Shimano's Hollowtech II technology is the perfect balance between stiffness, stability, weight and rotational efficiency. The goal was to produce a crank that minimises the effort required for the drive and enables more efficient power transmission. An exclusive forging process allows the production of extremely light crank arms that nevertheless guarantee maximum stiffness. The fixed connection of the right arm to the axle of the bottom bracket and its external bearing also serve an optimum relationship between stiffness and low weight.
Блок передних звезд Shimano DURA-ACE FC-R9200 172.5mm 2x12-speed 54x40T
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