Hollowtech II BB-RS501 English Bottom Bracket With Beefed Up Seal Design, Lightweight Anodized Aluminum Cups For Strength, Corrosion Resistance, And A Lighter Ride, Engineered For Hollowtech I Compatibility

RS501 English bottom bracket with sealed, lightweight cups
✔️ Sealed design with 68mm English threaded shell, 1.37 in ID, 93g

This BB-RS501 bottom bracket is built for Hollowtech II 24mm crank spindles and English-thread frames, delivering a durable, lightweight upgrade for road, mountain, or hybrid bikes. Its anodized aluminum cups resist corrosion while the enhanced seal guards against dirt, reducing maintenance and extending service life.

✅ Weight: 93g
✅ Material: Anodized aluminum cups
✅ Compatibility: Hollowtech II 24mm spindles, English-thread shells
✅ Shell: 68mm width, 1.37 in ID
✅ Finish: Silver anodized
✅ Enhanced seal protects against contaminants

💡 What is the purpose of a sealed English-thread bottom bracket for road and mountain bikes?

This handy component keeps the crank running smoothly by protecting bearings and cutting maintenance.

• Sealed ball bearings resist dirt, water, and grime for longer life
• English-thread shell with 68mm width ensures a secure, precise fit
• Compatible with Hollowtech II 24mm spindles for consistent performance