Shimano FC R7100 105 Compact Double 12 speed Hollowtech II Chainset

Blacks

Enjoy quicker, more precise front shifting and efficient power transfer thanks to its HOLLOWGLIDE structure. It cuts weights yet maintains stiffness, strength and performance. What’s more, the crank arm length starts at 160mm so smaller riders can benefit from SHIMANO’s legendary shifting.An attractive aluminum crank with hollow arms for lightweight, rigidity, and durabilityThe newly designed crank arms offer an optimized balance between lightweight and efficiency. The crank, formed with hollow aluminum technology, is anodized with a beautiful gloss black anodized finish, giving it a luxurious look. The resin ribs on the back of the chainrings are SHIMANO 105's unique structural design that achieves both thorough weight reduction and crisp shifting performance.Key Features:Optimal balance of stiffness, strength, weight and rotational performanceHOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shiftingCrank arm length: 160, 165, 170, 172.5, 175 mm Gear combination: 50-34T, 52-36T Q-factor: 148 mm

Amazon

Rigid arm construction helps maintain alignment under load, giving riders a direct feel during climbs and accelerations Bielas 12v-Negro compatibility makes replacement planning easier for workshop builds, upgrades or routine drivetrain servicing Tooth configuration is tuned for smooth cadence changes, helping keep momentum across mixed terrain and varied riding speeds Durable finishing helps resist everyday wear, keeping the component suitable for regular road, gravel or MTB use 175mm / 34T / 12v drivetrain layout supports efficient power transfer, stable pedalling and dependable chain engagement