Actually, my front sprocket looks exactly like this after just completing a 1855 mile ride around Lake Superior. Crossed the boarder from Canada into MN and suddenly she started to slip. I kept tightening the chain to keep going and reached the Twin Cities but just barely. I tightened and lubed the chain constantly on this trip, so I am not sure what went wrong, but I am keeping the sprocket as a token of my trip as it is so freaking crazy looking.