I always thought nitrogen filled tires were a joke.

Atmospheric air is already almost 80% nitrogen... Then the guy filling your tires, is he filling your tire in a nitrogen purged atmosphere enclosed from the normal atmosphere? No. He's putting the tire on the rim, then filling with nitrogen, so what about that volume of air already in the tire... you're still not at 100% nitrogen. So what are we at? 90%? 95%? VS. 80% to start with? I can't see it making that big of a difference...

My mileage has increased going to a 35" tire from the factory 31.5" or whatever was on here. Same gearing, same everything else. I think it helps that I do mostly highway driving and can get it up to OD and get the converter locked and cruise. If I had a lot of on the throttle/off the throttle situations, I could see it dropping some.

 

the main reason i went with wider tires is traction. kept braking loose the smaller/narrower ones during everyday driving. driving in the rain was scary. the 265s where not bad, descent wear and grip, wish i could remember what brand they where. got them used with about 1/4 tread left so only had them for about 10 months. taller narrower tires might be in my future but got to get through these ones first

nitrogen in tires always reminds me of the "Nitrogen enriched gasoline". what are they doing? filling it with air and charging you for it?

Nitrogen is more for keeping moisture out of the tire for better pressure management. if anything this would hurt the MPGs. with air and its moisture it will expand a little more when heated and put more pressure on the tire, thus better MPGs. with nitrogen it will still expand some but not as much as air as it will be drier. i guess you could over fill your tires a little with nitrogen and get the same effect. dollar wise: not worth it.

 

No nitrogen is just a $$$$$ racket, thats why I wouldn't suggest it.

 

your right on with the higher pressure but you give up the tire in terms of wear. all your tread will be on the outside and none will be on the middle over time. if you rotated the tires more often than normal this may help. but chances are slim, and with the price of tires jumping thru the roof i would be forgetting the very small gain you might be getting.
Hope this helps

 

At max inflation from the sidewall of the tire they will wear even.

 

that's what i run mine at - 65psi all the way around. 305/70/16 load range E, so far so good

 

Load range E's I usually run 80 lbs. But then my truck used to weigh 8900 lbs most of the time.

I've been running Amsoil 5w30 for many years. I'd call Amsoil tech service and ask what they recomend in your vehicle

 

Discount Tire recommended I run my E's at 70lbs in the front and 80lbs in the rear.

 

I think you have D's every E I have seen calls for 80 psi

 

but where they 305s? my stock 245 Es where 80 PSI max. i think the 285 Es where 70 or something.

most larger tires in the D range can hold just as much or more weight then the 245 E range can and have a lower max PSI.

these are the ones i have. talked them into about $165 each
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