Hello, I love my bike and know nothing about it...it's a Specialized Hardrock.
I'm hoping someone can help me out, recently I noticed that when I accelerate hard (lots of weight on the crank) that my chain tends to curve towards my wheel. The crank part stays stiff and straight as best as I can see, and the wheel does not tilt at all. So I'm guessing that something in the back is twisting? Is that possible?