Perhaps I should have stated that my rear wheel slid forward on the drive side. I don't think I stomped too hard on the pedals. I was going downhill.
The chain line is straight, that I always make sure of before I go out. However, the chain has been sagging a bit.
Originally Posted by labratmatt
I think there are two main things that would cause this:
1. Your chain line isn't straight.
2. Your chain is too loose.
Does it look like either one of these are true?