I run C & A Pro, race version on 8" carbides or 6" carbides on a 1/2" bar. I agree with Jay, in my experience with C & A Pros, they don't dart and they do track very well. 153 studs and there is no push on my F7. The race version skis are aggressive, but I want them that way and have not found them overly aggressive or a problem. The trail version is a bit less aggressive. I can't compare them to the stocker F7 skis, b/c I put C & A pro on right away. I found them a big improvement over stocker ZR skis in the past though. C & A will give the best flex of any ski.