Simple Hawk fix for chain rubbing on tire
 

All you need to do is take a box knife or razer blade to the ridge.

http://i63.tinypic.com/11uw80j.jpg

Now, instead of pushing the chain towards the tire, it is pushing it away from the tire.

http://i63.tinypic.com/2liykq9.jpg

Thanks, I need to remember to do this as I see a few chain marks on the outer most knobs of the rear tire. I like simple china mods like this....