Shimano BB-ES300 68 x 121mm Hollow Type Bottom Bracket cybersalespecialized23 With an alternating tread pattern

With an alternating tread pattern for smooth center-to-edge transitions and stacked knobs for unbeatable stability

Gravel RC is compatible with hookless rims according to the ETRTO 5bar / 73psi maximum pressure limit

The lightweight and durable co-molded construction with wide angle optics for 270° of visibility

plush comfort

Shimano BB-ES300 68 x 121mm Hollow Type Bottom Bracket cybersalespecialized23 With an alternating tread patternThe Shimano ES300 bottom bracket is made to be used in conjunction with Shimano Octalink chainsets. The Octalink splined axle crank arm interface creates a more rigid crank assembly compared to square tapered spindle. Axle length shell width_121_68mm_(BC1. 37) Spindle: Hollow pipe Spindle: Octalink Features Smooth and precise shifting performance with Hyperdrive technology Quiet shifting operation by reduction of driving noise (48T) Chain case