I found the R1Rs perfectly predictable and progressive on the back of the SV, but I was running them at 17psi cold. New one has CR500's but difficult to compare because: it has inboard front, and independent rear, suspension so handing is completely differentit has an LSDit has twice the powerI've not really had the opportunity to push it yetI would certainly go for the R1R/T1R combination again, and although the T1Rs look similar to the ZV3's they're nothing like them (for the better!).