The Shimano BB-RS501 bottom bracket features a special seal design which noticeably extends the service life. The bearing cups with BSA thread are perfectly matched to the interaction with Hollowtech II cranksets..
Features
- 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
- BB/Frame Interface: English
- Weight: 92g.
- Color: Silver
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