I have a Stumpjumper m4 HT. Lately I was shifting under constant pressure (some races with lot`s of gradient changes) with their obvius consecuences (chain suck).
After these races I realize that the right chainstay got scratched from the chain, to the point where the paint was ripped. Scratches of 2cm`s with no paint and the brighter aluminium exposed (to expose the alu in these frames isn`t that hard, because the paint chips with just rocks hitting the frame).
So, I want to know if that scratches may hurt the durability of the frame, or if it`s just the external layer and the material in those zones (near BB, is thick enough) that is getting hurt?
Thanks a lot!
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