Originally Posted by clsmooth71
it's disconcerting to hear that you're relatively disappointed in the T1-R's. I was considering getting a set next.
I currently have the T1-S's, and I've been pretty pleased with them. I have never tracked my car and do mostly local/city driving, but the T1-S's have been good all around tires. Their sidewalls are a little soft, and I thought the new T1-R's supposedly addressed that shortcoming.
As for your tire pressure settings, what size are you running? 30psi sounds pretty low, so I assume some sort of 16"?? Also, a 5psi variation is pretty huge. Most people I know run maybe 2-3psi lower in the rear.
FWIW, I'm on 18x7.5" VOLK LE-37T's w/225-35-18 T1-S's and 47psi front 44psi rear.
I guess I didn't make myself clear.
I didn't like the Goodyear GS-D3's either -- at first. IIRC, I was very disappointed with them initially, and even considered buying another set of SZ50-EP's (or similar). After a few weeks however, they tightened up. I can only guess that the improvement was due to some of the tread getting worn off.
I'm hoping that the sloppy handling is due to the fact that the T1R's are brand new and have lots of tread depth. As I said, they seem to be firming up already, so I am withholding judgment on their handling characteristics until they have a couple thousand miles on them.
I run the stock size on the stock rims -- 205/55-16. SOA recommended pressure is 32/29 psi. I've found that the WRX feels more neutral (less understeer) when the difference between front and rear tire pressures is about 5 to 8 psi (YMMV). I'm still experimenting. The Goodyears initially needed about 8 psi differential, say 38/30 psi. As they wore, I found I could reduce the pressure to about 36/31 psi.
I'm not familiar with the size tire you're running. My guess is that there would be a big difference in optimum pressures for different size tires. So 47/44 psi might be the best for your set-up, but I'm afraid if I go much higher with the tire pressure I will end up both reducing the size of the contact patch and wearing out the center of the tread.
Anyway, if you're happy with the T1S's, you will probably like the T1R. I think that a lot of my initial disappointment is due to the fact that the tires have full tread depth and therefore aren't quite as well 'planted' as a similar tire with less tread would be.
I'll post again if anything changes.