May I ask how much did they cost you? (Yokahama Spec-X's)
Tirerack.com has got the best priced Pirrelli Scorpion STR's for my 2007 CX-9 tires--about $100 each including shipped to me + mounting, balancing and disposal fees... these tires have lasted over 35,000 miles on the rear and a bit less on the front--I don't rotate as much as indicated because my front tires wear much faster than the rears... but that's just my experience
Question, do the rims still use the rubber valve stems. I was looking at the wheels of my 9 and they don't look like they use the rubber valve stems. I am soon going to be replacing the tires and want to make sure that they don't try to charge me for something i don't need. Also are the valve stems part of the tps system or are they separate?