Chain keeps coming off front ring - Help required

elffy
elffy Posts: 98
edited May 2009 in Workshop
When I am changing down the rings at the rear in preparation for a quick desent, I keep finding the chain keeps coming off the front of the front big ring. Is there any easy adjustment I can make being a novice to stop this or is it something I need to get my LBS to look at. I have degreased to chain so that shouldn't be the problem.

Comments