Originally Posted by etgdpu

Hi all,
Any opinion on why the Japanese drivers with the RRR Evo use big tires like 65/64 and 64/63 with only 1mm difference, which also make the car more front wheel driven.
Is it because they need bigger diameter so the tires will last the whole final or because the car is better dialed with bigger tires?
Is the 1mm difference related with the front solid axle? I suppose NO, because I have also found other setups from big names that they use 2mm difference with solid.
Thanks