Allows installation of English threaded cups in many BMX and older American made full-size bicycles
Truvatuiv bottom bracket adapter to convert American BB (51mm) to Euro BB (34.8mm) measurement consisting of two aluminium press fit cups for 68mm frames.
Features:
• Attaches to rear axle QR providing extra support for the derailleur and hanger.
• Improves shifting and prevents derailleur hanger from bending.
