The chrome steel ones for the old 5,6,&7 speed freewheels work very well. They're fastened securely to the hub. But, I can't seem to find any good ones for 7 speed & up cassettes w/freehubs. The plastic freehub style protectors just connect to the spokes with tiny little clips. The little clips break off & the whole dang mess starts floppin around. Does anybody know where I can get better ones?