Is there anything wrong with running 2 different sizes in tires on the rear dual wheels? Such as, the left side inner and outter tires are diff, and the right side inner and outter are diff? I dont have the exact measurements right now (but could look if its an issue) but the inner tires are noticeably larger (taller.. dunno about wider) than the outters.

Does this affect anything?

 

ya it'll knock your rearend out.

 

yup what he said and wear your tires fast

 

Whaaa? It will mess my rearend up? I'll get the exact measurements tomorrow but this is not good news. Will this impact traction and economy?

 

It will. Why would yo run different sized tires?

 

do you have a posi or limited slip diff in the rear?

you could get away with it if you have an openend ... but its still better to have all the same tire

 

You need the same size tires out back...all 4 of em. When I bought my '97 Dually (just sold) it had 157k on it with decent Cooper Discoverer ATR 235/85/16's out back, no telling how many miles were on them when I bought the truck. I kept those tires on the rear for over 3 years, and balanced them and rotated them from side to side, but they always remained on the rear. I sold the truck with 216k miles and the tires passed state inspection with flying colors maybe 1000 miles prior to selling the truck. That's 59,000 miles that I put on them! That tells me two things... 1-those Cooper's rule, 2- maintaining the rear tires makes them last a very long time. Moral of the story...if you want your tires to last, run the same size out back. Tires aint cheap, keeping the pressures even and always rotating/balancing them will prolong tire life. If one tire is newer or taller than the tire next to it...it will take the grunt of the weight and wear out faster. Traction will also suffer. The other (smaller) tire will constantly be scuffing the surface of the road and eventually become out of round. This also goes for tires with uneven pressures.

 

i never thought about the thread difference, thats a good thought.

 

cmon use your noggin

 

Bought the truck like that.. they have diff treads, sidewalls and maybe even widths.

Judging by my limited burnouts, its a limited slip.

How much were those coopers? I really dont want to get new tires but if my current tire situation is poor then I guess I really need to

Says a klein


Oh and for my info, how do I fill up both rear tires? I see one fill spout coming out the rear wheel somewhere, but what about the inside tires? How do those fill?