[snoxracer183]

I have driven the 615k+ on multiple cars, including a 90% prep'd STR S2000. They are only a couple tenths off the RE71 on like a 50 sec course. Local club stuff (50 car events) I can place top 3-5 PAX easily. I truly enjoy driving on them. They are also fantastic for lapping day stuff if you arent just SRZBNS autox. That said, they are NOT Z2SS. The rumor is the they share a similar compound but the tire construction itself is different from sources I have.

Like others have said, several One Lap cars use them. The RS Motors One Lap car runs them, and now owns the street tire record for 3 different tracks (Gingerman, Toronto MSP, Blackhawk Farms)