Not liking the loss in mileage.

[Wraif]

After much debate on both wheels and tires, I finally upgraded my stock Sahara. I'm not sure why I ended up choosing the 315/70/17s other than ignorance. This is my first true off road vehicle. I'm pleased with the look and certainly want to be able to confidently take full advantage of Colorado trails, including in winter, but the reality is I'll be 99% commuting. And with this upgrade I've gone from a solid 26 miles of pure electric range down to about 18-19.

So my question is, will I see much of a change if I return these tires and go 285/75/17? I also see I chose about the heaviest damn 315s made. The Wildpeaks are 73 lbs each. Even staying with 315s, the Goodyear Duratracs are only 62 lbs and a softer D load.

But if I go 285s there's the Toyo AT3s at 60 lbs in a C load, and KO2s at 61 lbs in E load. This would also take true height from 34.65" down to 33.9", which I know is also a factor.

So is it worth it to make a swap or will improvements be marginal and I just need to stop thinking about efficiency and go enjoy myself?

After much debate on both wheels and tires, I finally upgraded my stock Sahara. I'm not sure why I ended up choosing the 315/70/17s other than ignorance. This is my first true off road vehicle. I'm pleased with the look and certainly want to be able to confidently take full advantage of Colorado trails, including in winter, but the reality is I'll be 99% commuting. And with this upgrade I've gone from a solid 26 miles of pure electric range down to about 18-19.

So my question is, will I see much of a change if I return these tires and go 285/75/17? I also see I chose about the heaviest damn 315s made. The Wildpeaks are 73 lbs each. Even staying with 315s, the Goodyear Duratracs are only 62 lbs and a softer D load.

But if I go 285s there's the Toyo AT3s at 60 lbs in a C load, and KO2s at 61 lbs in E load. This would also take true height from 34.65" down to 33.9", which I know is also a factor.

So is it worth it to make a swap or will improvements be marginal and I just need to stop thinking about efficiency and go enjoy myself?

It looks great, go out and enjoy yourself. I don’t mean to be an ass, but, I hope you didn’t buy a wrangler for gas mileage. They have the aerodynamics of a barn. I’m surprised you were getting as good as you got before. You may not get great MPG, but you’ll get Great SPG. Smiles Per Gallon. Really, just enjoy it.

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[Wraif]

Are you trying to push around those big tires with the 2.0 slow 1995 cc motorcycle engine? My V6 with 4.10 ratio and 37” muds kicks ass. No issues

Is your Jeep auto or stick ? I’m running 35’s now but I want to go to 37’s, not sure if the 4.10’s will be good with my manual trans. It’s a daily driver, with some nice trails a few times a year. And it’s a Rubi so I got the 4:1 transfer case for rock crawling.

 

[Carlton]

This isn't accurate. At I said, I was assessing primarily electric range. And I wasn't basing it exclusively off the computer, but rather the known distance between my home and office, and far there and back I could get in electric mode before the engine kicked in. I know the distances and I lost legitimately 30% of my range. I saved 13 lbs per corner by switching. That is a huge difference.

If your shift points are incorrect and the vehicle isn't programmed for the correct tire size, you will lose mpg.... Reprogramming fixes the issues.

 

[Bleda2002]

If your shift points are incorrect and the vehicle isn't programmed for the correct tire size, you will lose mpg.... Reprogramming fixes the issues.

No actual way you lost 8 miles electric from 35's when a bunch of us are going 37's+ and still not losing that much after recalibrating on the 4xe's. My guess based on our experience with 32.8's, then 35's, and now 37's on our 4xe is your actual lost range was in the 10-15% range so 3-4 tops.

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