This is my own personal experience with this tire.
I have a basic bolt on 04 GT Convertible.
This is my daily driver.
I now have about 1,200 miles on these tires.
They are 275/40-17 and 315/35-17.
I got them off American Muscle with black Bullits for $900.
After the 500 mile break in, I've started pushing them. Not auto cross or drag racing. Just spirited daily driving in dry and wet.
So far I'm very impressed as a lot of people have given them bad reviews.
I had Nitto Motivos 245's before these.
The Sumi's are much more stable and give me more confidence in corners.
Again, daily driving. No racing.
I have pushed them periodically when no one else was around.
I've taken a 35mph corner at 70mph and almost went into the wall, but I feel it was more of my stock suspension to fault for this.
I just drive 120 miles tonight in the rain and hit almost 100 on a nice curve on an interstate. I usually do the same in dry conditions. It was in the 50's.
Safe? By no means. But I gradually tested the waters and am very surprised they kept traction so well.
From reviews I've read about the NT 555's and what youtube videos I've seen comparing them, I would assume the Nitto's are better.
But, for the price, these make a reasonable choice for a daily driver.
I will continue to update as the miles and driving experiences accumulate.
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