Hi.
I have a yeti sb66c and I got sick of pulling the mud out of the carbon fancy chainguide. So I removed it. Only lost the chain once on a visit to Rotorua. However, looks to me like my front chainring is now wearing down on the outside face at a dramatic pace. Does the chain guide / retention device actually help to hold the chain straighter on the chainring when it is on the largest sprocket at the back and so reduce the angle at the chain ring? The wear seems to only be on the outside of the ring.