you mean the calf-eating saw blade? It's been a long time since I've had one of thoseRBowles said:If you are bombing down a hill and are tired of hearing "chinka chinka chinka..
Then put your chain on the big chainring.
some of the older, non-Shadow Shimano models had a problem with the body pivoting forwards on bumps. Besides those I've never had a problem with derailleur contact.xenon said:Neither plastic tape nor inner tube look neat. I use a thick strap, cut off an old waistbag. Secure it to the chainstay by zip-ties, going through holes in the strap and under (rather than around) the stay. So the zip-ties are virtually invisible, the whole thing looks good, holds in place tight and the stay is protected. On one of my bikes I somehow forgot to put a protector on, the result was metal (not just paint) scratched badly.
By the way, sometimes the chainstay needs to be protected not only from the chain above, but also from the RD underneath. The RD can eat through the metal easily and the cut may go unnoticed until too late (I heard, it happens to Shimano RDs only, never with SRAM, but don't know for sure). Anyway, in this case a tube is not enough, let alone neoprene protectors. When I faced the problem, I had to use a piece of tyre, nothing else lasted.