275/70/18 Fuel Economy

[Nor Cal Cruiser]

Folks here get really worked up over this issue. I've accurately described my experience, which is apparently different than yours. I've never babied a vehicle more than this one and I find the EPA estimates laughably off. I also consistently get several more mpg when driving city streets than I do on the highway, for whatever that is worth, also contrary to EPA estimates. There are folks all over this forum that describe getting lower or higher mileage and that also describe better mileage on city streets. Going a constant 75 mph with manual throttle control on a flat highway for 20 or more miles I got around 17.5 mpg on OEM wheels and I now get 15.0-15.5 mpg. Those numbers get worse using cruise control, which unevenly attempts to keep the set speed. I don't care if someone doesn't believe that or falsely draws some conclusion about how I drive. I don't know how to drive like a Pruis driver, and I don't want to.

 

[Skidaddl]

We do indeed. Snow was about 2 cm over transformed crust. - very fast! We went in from Canmore and out via Kananaskis. the snow on the road was 4-5 cm south of the Mt Shark turnoff. We have been out to Louise as well and coverage is pretty darn good but freshies are always welcome!

I am putting a new summer set on the sprinter this spring and am headed to the Conti Terrain Contact which is a mild AT or Highway AT. The geolanders that came on the LC are surprisingly good on anything that is dry. The only terrain that scares me, in that I am likely stupid enough to gone on, is a soft field. However, I have found that a rarely get stuck when I am walking. I do have traction aids for the sprinter that are usually used for levelling.

Hilarious that we live in the same neighbourhood. Good to hear there's at least SOME snow out there. Thought about driving to Louise on the weekend, but changed my mind. Looking forward to doing some skiing over the break.

Definitely lots of tire options out there. I'll be interested to see what kind of life people are getting out of them. My Tundra has always chewed through tires, mostly due to the weight, and the LC is only a few hundred pounds lighter.

 

[DeepDive]

I almost always run my tires slightly higher - 37'ish on my winters, 41'ish on my AT's. The ride difference is negligible, but I think my economy and wear is better.

That's good to know. I've been running at 33. I'm going to move that up a bit and see what the impact is. Actually fine with the economy I'm getting, but no harm in trying to improve on that

 

[LCColorado]

Geez, that's not great.

It is what it is. I don’t think the tires make a huge difference, it’s just the nature of the areas I’m driving. I was only averaging 19.3 in the WRX I was driving before this.

 

[Skidaddl]

It is what it is. I don’t think the tires make a huge difference, it’s just the nature of the areas I’m driving. I was only averaging 19.3 in the WRX I was driving before this.

Yep, true. I'm not gonna fret over it too much, although I do agree with some of the people on here saying there's no way they should be advertising EPA's of 24 when most people are only getting ~ 75% of that. My driving will likely be similar to yours - Southwestern Alberta very similar to Colorado.

 

[geomars]

Are the mpg numbers people are reporting in this thread corrected for tire circumference? If this isn't corrected, both the mpg and odometer readings reported on the dash—which are based on wheel revolutions—are too low. For example, going from 32.6" stock tire diameter to 35" tire would cause an apparent 7% decrease in mpg even if there was no change in actual mpg because the wheel would turn 7% fewer times for the same distance over the ground. Does the software allow you to set tire diameter or circumference? (My 4Runner doesn't.)

 

[Markarian421]

Are the mpg numbers people are reporting in this thread corrected for tire circumference? If this isn't corrected, both the mpg and odometer readings reported on the dash—which are based on wheel revolutions—are too low. For example, going from 32.6" stock tire diameter to 35" tire would indicate a 7% decrease in mpg even if there was no change. Does the software allow you to set tire diameter or circumference? (My 4Runner doesn't.)

I put on slightly larger winter tires, initially the speedometer was maybe 1 mph off GPS but after a few thousand miles they were identical. Could also be temperature/tire pressure but it made me wonder if it adjusted itself.

 

[DeepDive]

I've stopped caring, but as stated above, best to check against GPS. The Nitto G3 275/70/R18's really aren't that much bigger than the stock tires. Not unexpectedly, GPS and vehicle readings are pretty close, so I don't think that's effecting MPG. I'm still running between 19.5 and 20.5. Removing the top rails on the roof rack this weekend. Although some have reported mpg improvement by doing that, it's not why I'm removing. Tired of them bouncing off signs as I pull into my parking garage for work!

 

[shs.1990]

I've stopped caring, but as stated above, best to check against GPS. The Nitto G3 275/70/R18's really aren't that much bigger than the stock tires. Not unexpectedly, GPS and vehicle readings are pretty close, so I don't think that's effecting MPG. I'm still running between 19.5 and 20.5. Removing the top rails on the roof rack this weekend. Although some have reported mpg improvement by doing that, it's not why I'm removing. Tired of them bouncing off signs as I pull into my parking garage for work!

I also lost about 1 mpg going to the nitro terra grappler g3s. I really like the ride and the look. I’m also about 20mpg now.

 

[DeepDive]

Yes. I think a much better tire for these trucks. I’ve been very happy with them. Solid on road and off. I don’t do any extreme rock crawling, so E rated tires aren’t needed for my use. I find these to be a solid compromise.

 

[Altitude]

I had E Wildpeaks on my Tahoe and they rode the highway like stones.

Since 99.x% of my driving is on-road I would not go that route again.

 

[kmershly]

I had E Wildpeaks on my Tahoe and they rode the highway like stones.

Since 99.x% of my driving is on-road I would not go that route again.

I have E load KO3s and they improved ride at least to my tastes.

I cannot speak to Wildpeaks.

 

[Gratefuldenglish]

Just ordered Toyo ATIII EV - 275/70/18. This thread has had a ton of information on sizes, brands, and opinions of SL vs E-Load tires. I am putting them on my wife's LC. We use the truck as a daily driver and light trail/property outings. I wanted the larger look (stance) in an SL tire. The EV option is new to the Toyo line. Does anyone have any experience with them? Yes, I know it has a less durable ply but has a weight of 43lbs and seems to be the best tire on the market for this size in an SL.

 

[Skidaddl]

Just ordered Toyo ATIII EV - 275/70/18. This thread has had a ton of information on sizes, brands, and opinions of SL vs E-Load tires. I am putting them on my wife's LC. We use the truck as a daily driver and light trail/property outings. I wanted the larger look (stance) in an SL tire. The EV option is new to the Toyo line. Does anyone have any experience with them? Yes, I know it has a less durable ply but has a weight of 43lbs and seems to be the best tire on the market for this size in an SL.

I wasn't aware that came in SL. The Nitto Trail Grappler in that size is also SL and gets pretty good reviews.

 

[Gratefuldenglish]

Glad to hear the G3s are getting positive reviews. I know the G2s were not rated very well. Nitto and Toyo are sister companies. I have had the Ridge and the Recon on Ram trucks and both were great tires. Looking forward to getting back on Toyo ATIIIs.

 

[Markarian421]

Just ordered Toyo ATIII EV - 275/70/18. This thread has had a ton of information on sizes, brands, and opinions of SL vs E-Load tires. I am putting them on my wife's LC. We use the truck as a daily driver and light trail/property outings. I wanted the larger look (stance) in an SL tire. The EV option is new to the Toyo line. Does anyone have any experience with them? Yes, I know it has a less durable ply but has a weight of 43lbs and seems to be the best tire on the market for this size in an SL.

Another welcome 275/70R18 AT option in SL! I think that means 4 now? Where did you get them? They hadn't come up as an option when I searched before (usually America's Tire). I added them to my spreadsheet, they look like a great option for light offroad use that may offer better fuel economy.

Open Country A/T III EV | The All-Terrain Tire for EV Trucks and SUVs.

AERODYNAMIC SIDEWALL​

• Reduces wind drag with innovative AeroWing™ sidewall lug design.
• Smooth sidewall with high-contrast lettering improves efficiency by reducing wind drag.

EV OPTIMIZED TREAD DESIGN & COMPOUND​

• Reduced rolling resistance and long treadwear life.
• Provides improves off-road durability and traction.
• Provides confident wet braking and handling.
• Protects from cut-and-chips.
• Delivers a quiet and comfortable ride.

Spreadsheet: