My thoughts on the Avon Tech STs...
It's too early to tell much yet since I've only had them on for 35 miles or so. But they were high speed miles as I had to rush to get my wife to her doctor's appointment on time. Shoreline Motoring did a great job for me and I paid less than $600 out the door for these tires. The guys filled the tires up to 33 PSI, torqued the lug nuts, applied tire dressing, re-torqued the lug nuts, shined the wheels and I was off in a flash.
First thing I noticed right away was that the tires were very quiet. Granted it was a little slippery since I'm still riding on rubber covered with mold release compound, but it was very quiet. It was actually a bit stunning as I could actually hear the air around the A-pillars driving at 45 mph. I could never hear the wind noise over the road noise before. I didn't realize the Goodyear Eagle LS tires were that loud.
The second thing I noticed is that the MO actually feels a lot more stable around turns. I had to whip around turns pretty quick to make lights (trying to rush home to pick-up my wife, then a quick dash off to the hospital for her appointment.) The MO actually felt a lot more sure-footed.
I got the MO up above 70 mph on Pacific Coast Highway and I noticed that road noise was barely perceptible and most of the noise came from the A-pillars. The shimmy in my steering wheel went away when I changed tires which tells me that the Goodyears were unbalanced before.
Ride quality is actually very close to stock. If I had to guess, it's a hair softer than the Goodyears. But I'll know more as I put more miles on the MO.
One thing I noticed (which is actually pleasing to me) is that the tires sit almost flush with the fenders as you look down the side of the car. The 265/60-18 size really does help to visually widen the stance of the MO. (In actuality, the tires are 15mm wider on each sidewall than 235/65-18s.)
I had to fight with my own indecision to replace the Goodyears. I didn't like them very much, but I didn't hate them either. Pretty much was ambivalent about them, but they had 1/2 tread remaining and I wasn't sure if spending $600 to replace perfectly good tires was worthwhile. When 1 tire developed a slow leak, I decided that was good enough reason to replace the set. After 35 miles, it is premature to say this with any certainty, but I really don't have any regrets having switched to the Avons.
I'll post more as the miles accumulate...
Bob