This may be the wrong way of looking at it but do you have a perforated saddle? I didn't have wearing issues on any pants until I got that $10 royal from nashbar. I've gone thru 2 pairs of Levi's.
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I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC