Mortop Sealed Bearing Bottom Bracket changes the locking method to internal for ISIS SYSTEM TOOL in both ends. It is not only lighter and thinner but also to solve the problem of easily wearing appearance.
Mortop Sealed Bearing Bottom Bracket BB1SM Features
- Material: CNC Durable Forged Alloy 7075 cups.
- Compatible for Shimano.
- BC-1.37″ X 24T for Road to fit 68mm Shell.
- BSA1.37”x24T for MTB to fit 68/73mm Shell
- Plastic center sleeve with double o-ring seals.
- Seal bearing with 2*O-rings.
- Ceramic bearing with 2*O-rings.
- Weight: 75 grams.