Not driven on a set of R888's, R1R's or V70A's, the 172 cup I've got only does track work and the pirelli p zero nero's fitted will only last 2-3 more track days. Would like to get either R888's, R1R's or V70A's but for the cost (got 16" Speedlines) difference will I see a big improvement in grip\tyre performance to match the >£40 per corner price increase,would the move up be worth it.
Cheers
Cheers