Originally posted by performula
So then Kawahara is the same as other Japanese tires and the claim that they last longer is a myth?
No its not, I believe composition between foam-rubber also plays an important role to the performance or characteristic of the respective brand. It does not mean more rubber is better (last longer is impossible) because it would also depends on how clean (amount of dust) in the particular track has.
I ever tried speedmind before, they have more rubber packed into it so they will last longer than if it were contained less rubber (such as the old GPR brands, some newer GRP packed with more rubber). I found more rubber is suitable for clean track. To sum it up, different composition will always have both of its advantages and disadvantages which you could compromise it with the car setup.
BTW, we distribute GQ tires, but I do not think I`m elligible to make an comments on them now, didn`t I?