My best for the night, with the mods I have in my sig, on Kumho 235/55/16 tires with 20k miles on them:

2.444 60'
9.561 1/8 ET
76.52 1/8 MPH
14.635 1/4 ET
97.56 1/4 MPH

I already know that I'm getting Nitto DR's in about a month or two. Supposing I were to cut a 2.0 60' my ET would be about a 14.191. This seems pretty pitiful, even after I get my DR's. I've run a 14.324 @ 98.22 with a 2.185 60' about 3 months ago. Considering my tires have NEVER really had an great traction, I figured they would at least last a very long time....I guess not.

 

With tires, there are ratings to consider... Most mileage ratings are base on "normal wear".....

Treadwear measures how long the tread should last compared with a reference standard of 100. A treadwear rating of 400 means that the tread wears four times as well as the standard. This grade is only accurate for comparing tires within a certain brand.

Traction is a measurement of a tire's ability to stop in a straight line on a wet road. The highest grade is AA; A is good; B is intermediate; and C is the worst.

Temperature measures a tire’s ability to withstand the heat build up caused by prolonged high speed driving, underinflation, or overloading. The highest grade is A; B is intermediate; and C is the worst.