An integral part of Shimano's new 12-speed road lineup, the FC-R8100 crank builds upon Shimano's legendary front shifting and transmission efficiency. With new refinements for seamless 12-speed shifting, the ULTEGRA crank is now offered in lengths from 160 to 175 mm, bringing performance and improved fit for smaller riders, triathletes, and riders with specific biomechanical requirements.

• 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.