when you think about it shouldnt a 35" tire have longer tread life than the same tire but in stock size?

 

Doesn't matter, most people's tires dry rot or split before they use up all the tread. I think the tire companies plan that. When I got my truck it had real nice expensive AT tires on it with plenty of tread left but the tires were splitting because they were 7 years old so I had to replace them. Same for the Jeep I had before the F150.

 

i meant that a 35" tire wouldnt spin as many times as say a 32" stock tire so in theory they should last longer in return theirs another reason their higher priced

 

More than likely that wouldnt turn out to be true. While your correct the 35 makes less rpm(Revolutions per Mile). A tire in a 35" size is more often then not a AT or MT and therefore falls in the Performance category. These tires have very soft rubber to get maximum traction. Maximum traction = harsher wear. If you happen to have a set of 35"s on your truck go out and push up on the knobbies. If you can move them you have some reaaaaallllyyy soft tread. My Goodyear Wrangler Duratracs are so soft they dont even have a treadwear rating, but I'll get about 30k hopefully.

Hope that helps!

To give you a comparison My stock Pirelli's on my 06 had a treadwear rating of 520 and I got 75K out of them. They were really hard tires and could spin real easy because they didn't get as great of traction compared to a tire with soft rubber.

 

There is a TREADWARE rating on every tire... Its a marking on the side wall...

That will tell you the tread life.... A 320 tread ware rating should last about 32000 miles... A 400 treadware rating should last 40000 miles.. .

Just add 2 more zeros onto the tread ware rating at that would give you the miles expected by that tire.

Perfrormace tires are real low numbers like 140....

 

but in reality a say bfg at 31" wont last as long as a bfg at 35" tire

 

Yes, a lot longer in my experience but once again if the rubber "dry rots' due to age the tires won't be safe to use no matter how many miles they have or how much tread wear. There is the cost issue also, you pay a lot more for the 35" tires so you may be paying about the same thing as smaller sized tires that wear out treads quicker. I think on the wear/cost issue it probably evens out. For mud, off road, snow, etc. the 35" tires are a lot better and of course look better on the truck. It really depends on what you use your truck for and what you want it to look like. And remember, there are gas mileage, weight, noise, and ride quality issues you should consider including changing a flat tire. My max stock size Wranglers do everything I need for my truck and look good too. What I am suggesting is don't go to 35" tires for the sole purpose of getting more tread life.

 

Really? cuz My tires don't have them. In fact a lot of All Terrain tires don't have them.

 

You are both right.
Some do, some don't, but you can go to the manufacturer's web site and find the rating I suspect.
Tread rating is not reliable, it depends on so many factors including the way the manufacturer tests the tire it cannot really be trusted. The best rating? Check with people and they will be glad to tell you which tires wore out quick and which didn't.

 

I though TREADWARD rating was a DOT requirement.