I can only speak for the Nittos. I bought a set of 225 40 17 mounted on Rage 5.0 wheels from discount tire.com and at first was sceptical about how good these tires were. I just came back from two days at Mosport (SVTOA event) and beating the snot out of these tires and I walked away impressed. I guess they just needed to be scuffed a bit. They gripped extremely well and hey I believe I posted the best autocross time on street tires. The best cobras on R compound tires were running mid 38 second times and I ran a best of 40.2 sec. Day to day driving is good, quiet and smooth. I noticed no difference in ride compared to the 16 inch KDWs. Pretty remarkable for a 40 series tire compared to a 50 series. The tread rating is 300 for the Nittos.
hope this helps.
Fern
