Eccentric Bottom Bracket For 68/73mm Frames With 55mm Inner Diameter, CNC Machined Aluminum And Steel Cartridge Bearing, Smooth Precision Fit For Bike, Easy Install, Durable Cycling Component

Eccentric Bottom Bracket for 68/73mm frames, 55mm ID bearing
✔️ CNC-machined aluminum body with steel core, about 136g

This eccentric bottom bracket is designed for bikes with 68mm or 73mm shells and a 55mm inner diameter, delivering precise chain tension and smooth power transfer for singlespeed and internal gear setups.

✅ 68/73mm shell compatibility
✅ 55mm inner diameter
✅ CNC machined threads for precise fit
✅ Lightweight aluminum body with steel core (136g)
✅ Sandblasted finish for corrosion protection
✅ カラー：ブラック

💡 What is an eccentric bottom bracket used for in 68/73mm frame setups?

An eccentric bottom bracket lets you adjust chain tension by rotating the inner cup, handy for singlespeed and internal gear hub setups.
Key points:
- 68/73mm shell compatibility with 55mm ID
- CNC-machined aluminum body with steel core
- adjustable eccentric for precise chain tension
- corrosion-resistant sandblasted finish