See more: Wheel Adjusters & Axle Plates
Fits standard 1937-1957 Big Twin and most aftermarket hardtail frames, Rear axle collar set for rigid frames
This axle collar set allows the use of regular, unstepped 3/4" (19.05mm) wheel axles in rigid frames and round style swingarms that have 7/8" (22.05mm) axle slots. With these 3/4" wide collars the axle adjusters do not push on the axle, but on the collar.