Radical retro styled; style matching the Kustom Tech rear drum brake. For Springer forks only. Comes with a special bearing like inserts (shoe plates) allowing you to torque down the wheel axle but still allowing the drum to rotate/move with the rocking suspension movement of the Springer fork. This mini-sized drum is made from cast iron; the best material for maximum efficiency in a drum brake. Fins in the center will aid cooling. The sides are aluminum. It is drilled for use with 40-spoke rims and is equipped with 3/4" (19.05mm) inside diameter axle bearings. Approx. dimensions: 3-5/16" (84.1mm) wide x 5-1/2" (139.7mm) diameter. Note: See 532491 for optional 21" stainless spokes & nipples for use with this brake drum kit in combination with a custom 21" rim. Note: See 597534 for replacement shoe plates.