However, I WILL NOT spend the money ona tre that has a tread rating of 140 which means on the rear of an NSX I will be lucky to get 5-7000 miles.
Then you should not have bought an NSX. Because you probably won't be getting all that much more mileage from the KDW on the NSX, either. The NSX wears through rear tires rapidly, and that's a fact of life. If you want your rear tires to last longer, you can fiddle with the alignment a bit, but it's still going to go through rear tires rapidly. It sounds to me like it was a mistake for you to buy an NSX.
As noted above by CarCrazed4Life, treadwear ratings are notoriously poor at estimating treadlife, especially when comparing one tire brand with another.
this is a WASTE of money-
I think it's a waste of money to use tires that are so mismatched that the car is unsafe. You won't have that with the RE050A PP, but you will with the KDW.
I also think it's a waste of money to pay a lot of money for a car that handles well, and then use mismatched tires that will degrade its handling. Talk about a waste of money!
Buy my S-03 225/35/18's (set of 2 or 4) so i can purchase an extra set of KDW.
Let your dealer swap a pair of those overpriced, relatively crappy KDW for a pair of the RE050A PP, and you will have a set of four tires whose performance is close enough that mismatched tires aren't a concern.
I will look into a set of kdw for the front.
Oh goodie! Overpriced, crappier tires all around - talk about a waste of money! But if you're going to get crappier tires all around, then get the Kumho SPT; at least they won't cost you as much as the KDW.
i think suggesting anyone purchase the RE050A pole position is a poor choice unless the car is a track car and yo uexpect to drive hard and wear thru tires rapidly.
I think suggesting anyone purchase the overpriced, crappier KDW is a poor recommendation, even for NSX drivers who only drive their cars on the street.
Most owners want the NSX to perform as well as it's capable of doing, and didn't spend ~$30K (or a lot more) on a high-performance car so they could degrade its performance by getting low-performance tires to save a few hundred bucks. But you are obviously set on wasting your money, so if you are going to do that, at least be safe, by buying four matching, crappier tires. You can overpay for crappier tires by getting the KDW, or you can put cheap crappier tires on your car by getting the SPT. Your choice.
I think there are still better options than the route you picked... But thats just MHO.
And mine.