Shimano Ultegra FC-R8100 Left Crank Arm 175mm RGroup_7D890A0CA2BE0B6DA7121CEAC5BC5B9CFF079708 It is also optimized for

It is also optimized for BTA mounts

it features bi-stretch mesh underarms for enhanced airflow

ensuring versatility and durability in all conditions

The backlit screen is easy to see whether checking tires on a dawn raid

Constructed from durable 6061 T-6 hollow aluminum

Shimano Ultegra FC-R8100 Left Crank Arm 175mm RGroup_7D890A0CA2BE0B6DA7121CEAC5BC5B9CFF079708 It is also optimized forReplace a worn left crank with the Shimano Ultegra FC R8100 Left Crank Arm 175mm, engineered to bring back the crisp, connected feel of Shimanos premium road drivetrain. This crank arm uses Hollowtech II hollow forged construction to boost stiffness and power transfer while saving weight for quicker acceleration and smoother high cadence riding. With its 175mm length, you get a longer mechanical leverage profile that can help you drive harder on