Bicycle Bottom Bracket Bearing Set For One Piece Crank - Select Kids Or Adults

Kids bottom bracket set:

• Suitable for 1 piece cranks
• Bearing ring (outside diameter) 37mm
• Outside cup - (where it fits into the frame) 43mm
• Not suitable for adult bmx bikes
• Cups, washer, locknut and bearings all included

Adult bottom bracket set:

• Suitable for 1 piece cranks
• Bearing ring (outside diameter) 45mm
• Outside cup - (where it fits into the frame) 51.5mm
• Suitable for adult bmx bikes
• Cups, washer, locknut and bearings all included