Shimano FC-R8100 Ultegra Double Crankset - 12 Speed
Shimano FC-R8100 Ultegra Double Crankset - 12 Speed, Features of the Shimano FC-R8100 Ultegra Double Crankset - 12 Speed Optimal balance of stiffness, strength, weight and rotational Performance HOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting 52-36 and 50-34 chainring options. 160, 165, 170, 172.5, and 175 mm crank arm lengths