Shimano 12s 160mm IFCR7100MX04 FC-R7100 50-34T

Designed with rigidity, strength, weight, and rotational performance all optimized. HOLLOWTECH II construction reduces weight while maintaining strength, resulting in better power transfer. Available in five crank lengths: 160, 165, 170, 172.5, and 175 mm. Two gear options: 50-34T and 52-36T. Q-factor: 148 mm.