I did a hella muddy 24 hour race over the weekend, and decided to take apart my frame to relube the pivot bearings. most of em had held up pretty well, but the right side horst pivot (near the dropout) was quite gritty. The reason for this grittiness as far as I can figure is that the included chainstay guard is designed to cover the pivot, this holds mud and water against it instead of just letting it dry out.
To remedy this situation I simply cut an inch off my chainstay guard to expose the pivot. I doubt the chain is very likely to slap that part of the frame anyway.
anywho, that's my little tip.
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