Aluminum Alloy Bottom Brackets 68-73mm Mountain Road Bike External Bearing Bracket for

Description:

- Made of high-quality aluminum alloy material, anti-rust, anti-corrosion, durable.

- Designed to work with BB30AR and PF30R bottom brackets.

- BB30AR: φ42mm,PF30R: φ46mm.

- After conversion, ordinary hollow chainrings with 24mm shaft core suit for SHIMNAO, for , for FSA, etc. can be installed.

- There are backing rings, depending on the actual situation, choose the pad and not pad. Size Chart: BB30AR: Top: Caliber: 24mm/0.94inch Bottom: Caliber: 42mm/1.65inch Gasket: Outer Diameter: 32mm/1.25inch Inner Diameter: 24mm/0.94inch Thickness: 2mm/0.078inch PF30R: Top: Caliber: 24mm/0.94inch Bottom: Caliber: 38mm/1.49inch Gasket: Outer Diameter: 32mm/1.25inch Inner Diameter: 24mm/0.94inch Thickness: 2mm/0.078inch

Package Includes: 1 Piece Bicycle Bottom Bracket 2 Pieces Gasket