Drivetrain grinding when wet
Have noticed in the past couple of weeks, that whenever my bike (2007 Tricross Comp) gets wet that I get some kind of funky noise and almost a grinding feeling in the drivetrain. I'm 99% sure it's not the crank -- cause if I hop off the bike and spin the crank backward - no noise.
After riding home last night in the rain, it seems like it's coming from the cassette area. Going to throw it on the stand and look for anything unusual later today. But any ideas would be appreciated.
Would a worn chain act like that for any reason? I've got almost 6k miles on this chain, so time to replace it anyway I guess.