I just installed new deep-dish bullitt rims on my car about a week ago, and want to maximize the treadwear on the tires (they are factory rated @ 160 for treadwear...typical for a summer tire). I'm running a common staggered set-up, with 17x9's in the front, and 17x10.5's on the back (obviously ruling out tire rotation). I know that a bunch of folks run the Sumitomo HTRZ's with this arrangement, because they are the only reasonably-priced summer tire on the market in these sizes (other option is the Goodyear F1 supercar tire = $$$ ).
The sidewall lists the maximum pressure @ 44PSI. I don't drag/street race, but I do enjoy pushing the car in corners (i.e., exit ramps, backroads). I'm basically looking for feedback regarding what others with non-drag radial tires are running on the street for maximum treadwear. The last set of Sumi's on the car (245/45/17, HTR+ all-seasons, on the factory 17x8 wheels) showed signs of overinflation at the Ford recommended inflation specs (from the glove box). I currently have the new tires set at a cold PSI of 40, and they seem to stick pretty well; however, I'm not sure if a long trip or summer heat will push them over 44psi (BTW, the tires have an "A" temperature rating)! What do you recommend?
The sidewall lists the maximum pressure @ 44PSI. I don't drag/street race, but I do enjoy pushing the car in corners (i.e., exit ramps, backroads). I'm basically looking for feedback regarding what others with non-drag radial tires are running on the street for maximum treadwear. The last set of Sumi's on the car (245/45/17, HTR+ all-seasons, on the factory 17x8 wheels) showed signs of overinflation at the Ford recommended inflation specs (from the glove box). I currently have the new tires set at a cold PSI of 40, and they seem to stick pretty well; however, I'm not sure if a long trip or summer heat will push them over 44psi (BTW, the tires have an "A" temperature rating)! What do you recommend?