All right all right touche... didn't mean any disrespect before, and i guess i don't know what i'm talking about. I was pretty sure a lighter shoe would grap less like you say, but would do it at lower rpm's. No physics eq you could ever dream up would be beyond me, i really enjoyed it in school, but its been a while since i've applied anything practically. I was just really hoping my shoes being warn slightly would be the cause of my problems because its a simply fix. Any other ideas? Since i'm getting new shoes anyway i'll try trimming my old ones down, but i just don't see how that would help. My shoes deffinatly haven't gotten heavier over the years. Thanks for setting me straight.