I am not sure but I think the OEM tires on the 2002, which are Bridgestone Potenza RE040 H0, 215/40-17 front, 255/40-17 rear, do NOT have the unique construction used on the '91-01 OEM tires, with their corner-specific design and built-in bias to work with the NSX alignment. However, I believe they are excellent tires nonetheless.
That being said, if you like the stock tires, I would continue to use them. And, if you're only replacing rear tires and not front tires, you should definitely get the same type of tire. Tires shouldn't be mixed (one model on the front and a different one on the rear).
Also, remember that the Potenza is a line made by Bridgestone, but they have many different models of Potenza tire. If you want to stick with (pun intended) the same great tires that come on the car, make sure to ask for the Potenza RE040 H0.
Compare prices. The stock tires are $211 front and $249 rear at the
Tire Rack. If you're a member of the
NSX Club of America, use your member number to call Discount Tire to check their prices with your member discount and see if they're less expensive, which they often are.
[This message has been edited by nsxtasy (edited 20 December 2002).]