Originally Posted by Bikeguy Joe
That's what I was thinking...the derailuer aligns the chain to the rear casstte.
I agree that the derailer aligns the chain to the gears, but there's an acceptable working range that the derailer was built for and I'm well outside that range. The chain comes off the front sprocket at too much of an angle for the derailer to compensate and see any kind of longevity. At the angle I' currently at, the chain will begin to grind away at the sides of the derailer.