Cooper Discovery STT 315/75R16
This is my first set of Cooper mud terrain tires, however, I am also running the Discovery A/T's on our family van (Ford E-350). So far they have been a great tire.
Considerations for Purchase
Having owned MT/R's on a previous Tundra and not been happy witht he treadlife, noise, or balance characteristics, I wanted to find a tire that had the following characteristics:
1) Agressive yet offer a relatively quiet ride
2) Balance well without adding excessive amounts of weight
3) Excellent offroad performance, I plan to use on all terrain from Moab to mountain dirt and shale
4) I had to have a 315. I didn't want the look of a smaller size tire.
Other tires that were considered include: BFG MT, ProComp Mud Terrains, and Toyo MT.
Performance
I have had these tires on since January 2006. So far I have driven them on both wet and dry roads, in deep, wet snow, and on the rocks and mud in Moab. In all conditions I am very impressed. These tires are very quiet for such an aggressive mud terrain (althought he LX is well insulated). Excellent balance characteristics and handling on dry roads. Have run up to approx. 85mph without any significant bounce or wobble. Tends to follow ruts a bit, but typical of a tire this big. Granted the 80 is no hot-rod, but I can't get them to break traction on dry pavement.
Wet pavement characteristics are similar. Snow performance is excellent. During a recent snow run, found they dug extremely well. Performance on Moab mud and rock is also exemplary. Lugs clean well and grip great, even on wet slickrock. Ran at 18psi without any issues, and felt I could have ran them much lower to get better flex from the sidewall.
Have driven them for approx 1500 miles and the little nubbies are barely worn off. I was also able to fit the spare in the stock location under the rear cargo area...barely. However, it did rub on the rear panhard (rubbed the paint off).
Not a true 35" tire, measures out to 34".
Recommendations
I am MUCh more impressed with this tire than the Wranglers ran previously, particularly regarding wear, noise, and balance. Performs similar to the wrangler on the rocks, however, I feel the STT is a better snow tire. I have also since found that they are lighter than the Toyo, which means easier to get rolling and to stop.
Although I have not run them for many miles, my short term recommendation if an emphatic "buy". Besides, they have cool little knights on the sidelugs

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Here are some pics: