I run the 275 pro's on the street and track. Way too much fun. 18psi everywhere. How fast do they wear on the street. I drive my car alot and I kind of get tired of changing tires at the track. I'm thinking about buying a new pair and just leaving them on the car all summer. I got about 4500 miles and a probably ~100 dragstrip passes on my previous set. I'm a little easier on this set and don't beat on them as much....except for the other night...when I had to punish the motorcycle for thinking he had something for me... 
'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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