Because of the thicker blade do the extremes hinder the tire growing at top RPM's though? I've had a couple of shops tell me they do (meaning haulers have more top end), but not sure if they just wanted to see the cash register open and have my cash go in it OR if there is some truth to this. I'm sure it's all relative though depending on sand conditions, distance of race, etc. But again, I flat drag at Gordon's and Glamis and also at the hills at both locations.