Shimano BB-RS501 Hollowtech II English Bottom Bracket

The 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 Spindle Interface Type: Shimano Hollowtech II Series: Tiagra BB Shell Width: 68mm English, or 70mm Italian BB/Frame Interface: choose; English, or Italian Weight: 92g. Color: Silver