I'm not sure exactly how the rear hub operates on a coaster brake, maybe a little brake shoe. My question is this: Since I use my brakes a lot slowing from 20 mph or so, my brake is starting to get rear touchy (sensitive), similar to my last hub which eventually locked up. I assume that these coaster brake hubs can't stand up to the braking on a beach cruiser that normally wouldn't be going faster than 10 mph or so. I thought my first hub failure might have been a fluke (failed at around 2000 miles in four months. I can't keep replacing rear hubs. I'm wondering if a rear disk can very easily be adapted to a beach cruiser?