I just installed one on my '11 Vegas yesterday, before I left work (I work in a shop, so that's where my tools are). I set it at +6 degrees to start. I couldn't do a thorough test though, because I live only 12 miles out from Boston; traffic is a *****. I did get a couple of good pulls in, and I haven't heard any pinging at all. Also didn't seem to be THAT much difference in power, but I obviously can't really say for sure until I can actually RIDE the damn thing. Jose is raining on us the next couple of days though, so I won't be able to ride it until then.