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So I've been running Kumho Ecsta PS31 on 17/17 for the last 2 years and really like them. 215/40-17 in front and 245/40-17 in rear. Very nice dry grip, have made two trips to Tail of the Dragon on them, plus many other road trips in the Southeast (two NSX Mideast meets, Amelia Island Concours, Hilton Head Concours, Petit Le Mans, etc). Wet traction is good when I need it although I try not to drive the NSX in wet weather. In fact I got caught in a flash torrential storm last week and was still confident at 45mph on the highway, with expected some hydroplaning in the puddles. I do *NOT* track my car. About 10k miles on them and tread is still good up front, but the rears have some slight camber wear. So I just acquired a set of 17x8/18x10 wheels (sorry Bob but leaving the Model 5 gang lol), and they have this tire in 265/35-18, so I am ordering those for the new rears and will re-use my current fronts. Why change a good thing? Will stick with these tires until they show me otherwise that they are not suitable for my driving style.