Shimano BB-RS501 Hollowtech II Italian Bottom Bracket Sram Rival Direct Aero Mount: The Speedfil

Direct Aero Mount: The Speedfil Z4 Cage is designed with numerous ports for a direct BTA mount into the aerobar extensions with a minimum of 4 nylon zip/cable ties (included)

no matter your pace

Helmet Style: Recreation

while a reflective graphic at the back boosts rider visibility for added safety on the road

70 CRANK ARM FINISH Anodized COMPATIBLE BB TYPE Outboard GEAR ARMS 4 COMPATIBLE CHAIN HG-EV|11|Speed/|HG-X11 SERIES Dura-Ace INNER RING MATERIAL Aluminum GENERATION R9100

Shimano BB-RS501 Hollowtech II Italian Bottom Bracket Sram Rival Direct Aero Mount: The SpeedfilThe Shimano BB RS501 bottom bracket features an enhanced seal construction to provide long lasting performance and service life. Designed for a perfect fit with Hollowtech II 24mm crank spindles Anodized aluminum cups are high strength and light weight For use with Italian threaded bottom bracket frames keyword search: RS 500 Spindle Interface Type: Shimano Hollowtech II BB Shell Width (mm): 70 Bottom Bracket Shell I. D.: 36 Defined Color: Silver BB