Exceeding the 27t max gear limit usually requires screwing the b adjustment screw all the way to pull the derailleur beck behind the cogs so that it doesn't rub. I've heard of guys even replacing the stock screw with a longer one.Drone 5200 said:WOW! I'm impressed. You are a knowledgeable crowd. Thanks for sharing the wisdom. And so fast, too.
One follow-up: Is that 27T max for real? Anyone with experience using a 29T on the RD-7800?