in dirt i mean dirt jumps, dont gotta deal with off camber really, you should try some actually street specific tires for park use, i think youll be suprised, on a slick street tire theyre quiet, much smoother, and roll wicked fast which means less wasted effort for goin balls to the wall. Thats cool that hollyrollers work out for you that well, theyre a good all around dj/park tire, heck i rock em on my 20 for dj, and 24 always. i just think theyre are better performers out there especially for strict park use. my 2 cents.
i wouldnt run a holy roller in the back for street. i run one now in the front for an all around setup but thats because my tioga fs100s are toast. those were the best street tires ever. although i am curious to try the new wtb ones.