U Bolt Clamp KitsBack Plate for 42mm Tube x Over 570mm Wide Mudguard – UB42BPW U Bolt Clamp KitsBack Plate for 50mm Tube x Up To 570mm Wide Mudguard – UB50BPN U Bolt Clamp KitsBack Plate for 50mm Tube x Over 570mm Wide Mudguard – UB50BPW 1 2