Hi guys,

I've got a question about my RD. I've got double chain rings in the front and 7 speeds in the back. When the chain is on the larger chain ring, I can shift back and forth between the largest and smallest cogs with no problem, and the chain doesn't fall off into the wheels or into the frame.

When I'm on the smaller chain ring, however, the chain rubs against the bottom of the guide pulley cage when I'm on the high gears (smallest cogs).

What's my problem here?

Any help is much appreciated! Thanks in advance!