Bicycle Bottom Bracket Thread Kit BC1.37-24T BB51 68-73mm For Road Bike BB Central Axis Thread Mountain MTB Bike Center Shaft

High-concerned chemical：None Type：Bicycle Bottom Brackets Model Number：PN1994 Use：Mountain Bikes Brand Name：riderace Origin：Mainland China Type1：Bike Bottom Brackets Adapter Type2：Bike Central Axis Type3：bike accessories

High-concerned chemical: None Type: Bicycle Bottom Brackets Model Number: PN1994 Use: Mountain Bikes Brand Name: riderace Origin: Mainland China Type1: Bike Bottom Brackets Adapter Type2: Bike Central Axis Type3: bike accessories