Star Specs are without question extremely good, at my HPDE's 90% of the cars have Z1's and the other 10% have r-comps. No one ever complains about them. It can also be because there on the cheap side...compared to like RE-11's...I never seen anyone with rs3's yet or else I would have asked them how they were. The extra contact patch will make immense difference though. However, if Z1's came in 225/45...I think they would give the rs3's a challenge

Perfectly square on a 15x7

Perfectly square on a 15x7

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