I have had RE001 in the EF8 and they are very grippy. They are very good value.
I am at the moment getting the RT615 for my euro, 225/40/18. For the size, best price for RT615 (which I paid) is $290 a corner. Best price for RE001 is $365. KU36 is $233. I'm expecting RT615 to be more grippy any way.
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