The SUR4G we have seen perform almost on par with the re71r with more heat cycles. It stays very consistent and grippy until the end. Its very consistent we have knocked out 30 min sessions with lap times all within a second of each other. We also get more events out of a set vs the same size re71r. This is on an NA car with no aero so results can change. I know OP has experience with them as well.
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