Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Tires profiles and sizes

Longsnowsm · 07-28-2015, 01:04 PM

Well after all that research on tires for my truck it turns out that the decision was made for me! The truck needed tires, and the dealer stated as much so I have been trying to figure out the best tire based on the OEM sizes that were used on the truck to replace the existing tires... What I didn't know is that the wheels on the truck had been replaced with a 16" wheel instead of the stock wheel. And the dealer after talking with me decided that he didn't want to see me driving that truck with those existing tires through part of 7 states to get it home... So he put new tires on the truck for me. The good news is that he appears to have chosen a decent tire. The bad news is that it isn't exactly the tire I would have chosen for longevity or LRR. The tire is bigger than the tire that I was going to put on it in a 15" size, but only slightly. The tires are a 235/70R16 so they are slightly taller than the 225/75R15 that I had planned. So that worked out well as far as RPM and economy.

The bad news is it is more of an All Terrain tire, and not what I would have preferred. But I got new tires in the deal and that is always a good thing. Leaves more money for other projects and mods that are needed. So overall I am pretty happy, RPM's at 65mph are about 2150. Of course the speedo and odometer are off. The factor I am using is 1.0833 as the multiplier for miles and economy. So far it looks good. Thanks for your input. I like having the larger wheels on the truck and the larger tire helped on the highway where I will use the truck most often so it is a great fit.

07-28-2015, 01:04 PM	#17 (permalink)
Longsnowsm EcoModding Lurker Join Date: Apr 2011 Location: US Posts: 70 Peaty - '03 Honda Insight Jimmy - '07 GMC Canyon 2wd, Extended Cab, SL Thanks: 22 Thanked 12 Times in 9 Posts	Lots of research - and the decision was made for me! Well after all that research on tires for my truck it turns out that the decision was made for me! The truck needed tires, and the dealer stated as much so I have been trying to figure out the best tire based on the OEM sizes that were used on the truck to replace the existing tires... What I didn't know is that the wheels on the truck had been replaced with a 16" wheel instead of the stock wheel. And the dealer after talking with me decided that he didn't want to see me driving that truck with those existing tires through part of 7 states to get it home... So he put new tires on the truck for me. The good news is that he appears to have chosen a decent tire. The bad news is that it isn't exactly the tire I would have chosen for longevity or LRR. The tire is bigger than the tire that I was going to put on it in a 15" size, but only slightly. The tires are a 235/70R16 so they are slightly taller than the 225/75R15 that I had planned. So that worked out well as far as RPM and economy. The bad news is it is more of an All Terrain tire, and not what I would have preferred. But I got new tires in the deal and that is always a good thing. Leaves more money for other projects and mods that are needed. So overall I am pretty happy, RPM's at 65mph are about 2150. Of course the speedo and odometer are off. The factor I am using is 1.0833 as the multiplier for miles and economy. So far it looks good. Thanks for your input. I like having the larger wheels on the truck and the larger tire helped on the highway where I will use the truck most often so it is a great fit.