Smooth Hollowtech II Bottom Bracket For Ultegra 105 And CX70 Cranks, Fourteen Grams Lighter Than BB6700, Fifty Percent Less Friction, Slick Anodized Cups, Lightweight Bearings, Compatible With FC R8000 FC 6800 FC 5800 And Metrea U5000

Lightweight Hollowtech II BB for Ultegra/105 CX70 Cranks
✔️ 14 g lighter than BB6700; 50% less friction; anodized cups

The Hollowtech II bottom bracket is a lightweight, high-performance unit designed for road bikes. It installs with Ultegra, 105, and CX70 cranksets and is compatible with FC-R8000, FC-6800, FC-5800, and Metrea U5000 platforms to smooth rotation and cut weight.

✅ 14 g lighter than BB6700
✅ 50% less friction than BB6700
✅ Small ball bearings keep weight low
✅ Anodized bearing cups
✅ Compatible with FC-R8000, FC-6800, FC-5800, FC-U5000, FC-CX70

💡 What is a hollowtech II bottom bracket and why upgrade to a lighter model?

It's a handy upgrade for road bikes looking to shed weight and boost crank efficiency.

- Lightweight hollowtech II bottom bracket improves power transfer on road bikes - Sealed bearings and anodized cups resist dirt and deliver smooth rotation - Compatible with Ultegra FC-R8000, FC-6800, FC-5800 and Metrea FC-U5000