There is a fiber bushing that rubs against the hub. I've got the same set-up laying around here some place. Don't expect that thing to actually stop you though. . . . they work O.K. to hold your bike bike in place AFTER you come to a stop. I ran mine with a jockey shift/suicide clutch set-up many moons ago.Scavenger, is there a spacer between the inner lever and the hub. There isn't much space between it, and the spokes.