Taller tires for better MPG ?

What about going to a "slightly" taller tire that is lighter and more narrow like 235/85-16s (I checked 225/85-16s but no one makes them). My current 245/75-16s weigh 53 pounds (Michelin), the 235/85-16s weight 45 pounds (Continental).

If not, would at least this help us; go "skinnier" - what about going with 215/85-16s. It's just about the same height, less friction with the road and the tires weight about 18 pounds less than the stock tires. That should help with MPG, right?

thanks

I'd have to go with that.... when our friend got the tires for us they were 8 ply because we tow the trailer... they said "max pressure 65 psi" so I ran them at that..

When we took it back in for rotation, he freaked and lowered it to 35 front and

Mac

oh, s*it... you going to get heated leather seats now, bro? Mac

Ken.. before or after speedometer recalibration?

I would guess at about 7 or 8% error with that tire change... Mac

Gotta tell ya story bro. For me heated seat's are dangerous. I've worked nights most of the past 30 years and never had a problem staying awake while driving. I had left the truck at home and taken Sue's eldo, at about 3:30am on a cold Feb. morning I'm driveing along and figure let me try these heated seats. 5 minutes later I'm thinking these are real nice sooo comfortable. 10 minutes later I catch myself nodding off. Too comfortable. Had the same thing happen a few weeks later. Those were the only times I had ever nodded off while driving. Never, ever will you get me to use them again Yup, I do have a sensitive ass.

Roy

Unless they are also at maximum load, they are overinflated. We are not talking about passenger car tires here.

Not always enough to see and you will notice a reduction in traction.

Tire retailer said recalibration wasn't necessary. I'm going back to 215s or maybe to 225s real soon.

Ken

hmm... opposite of brain freeze?? Mac

We went up 1 size on the Ram and it reads 60 when you're doing 63... yours should have been maybe double that error with 2 sizes... Mac

Just don't crank up the heat in them after visiting the Chili and Hot Wings diner.