the same thing again. If I spray just a little anti-slip belt compound on the aluminum crank pulley, this goes away. I'm 99% certain this is caused by the smaller size of the crank pulley and the smoother, lower-friction aluminum surface. This never happened with the stock pulley. I'm not saying I don't like this pulley, but I'd like to get rid of this problem and still keep the low weight crank pulley. Has anyone found any solution to this? Do others have this problem too? :Thanks