Unlike with stock type spoke wheels MAG-12 wheels require the drum to be bolted to the hub from the front side. The existing grease deflector, however, demands the bolt circle to be enlarged slightly so the bolt heads clear the deflector.

For those who don’t have a brake drum yet or would rather not drill their stock drum these pre-machined versions are just what the doctor ordered. They feature a modified bolt circle and fit your new Cannonball MAG-12 wheel right out of the box.