Well I like my new toyo Open Country 225/75s on the stock wheels of my 94 sidekick 4door.  Thye ride a lot btter offroad than my previous worn out 205/75s but I just hope my gas mileage doesn't go to hell

I am kind of shocked at how much bigger these look than my worn out stockers.

What kind of gas mileage are you guys getting with similar tires?

well i got 30x9.5x15 ats and get around 400 kms to a tank with a 1.6 8v 5spd on a 91 tracker

If everything else is stock probably in the mid 20's.

Thanks for the replys.  This is my first post here. I apologize for putting this in the wrong section.  I'll be more careful with that in the future.

This section is fine.    I get between 25 and 28 mpg with the 235/75 R15 tires on my 96 Tracker.  It really depends on which station I get fuel at and what my average speed is. 

235/75r15 aggressive private label mud tires, 1 inch coil spacers, short ram intake, aluminum wheels, and 190 degree T stat.
191,000+ miles, 8v, 5 speed, 2 door soft top.
I have seen a best of about 27 mpg with 24-25 mpg in the winter, 21-23 summer,  being an average depending on if the fuel has ethanol or not and my right foot.

I can run for 3 weeks |removethispart|@ 5 miles a day 5 days a week in a Sammy with 34" tires... LOL.... or from a full tank all the way to Crap... I think I need some gas in the tank .... 

In the Midwest it is commonly between the point of about a $.30 increase from the time before... 

 Shouldn't the gas mileage improve with bigger tires since you actually go further with each revolution. Or is there something Im missing!!
 Curious minds want to know!!!!
Ron L

Bigger tires mean more weight, usually they are wider and have an aggressive tread pattern so it has more rolling resistance.

Bigger tires have negligible contribution towards increasing the gas mileage as it require engine to work more to get the vehicle to move.


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Yes & No...

I went from 30's to 34's. Steel rims to aluminium rims. My current tire / wheel set up weighs less than the previous. I do have a 1.6 8 V but if the gear ratio isn't changed then it takes more power to turn the taller tires at higher speeds as the vehicle momentum begins to slow against the wind / landscape resistance.

We have 10% ethanol in our fuel.
I have 3" lift with 235/75/15 wal-Mart Goodyear wrangler a/t on steel 15x7 black d.
I have a header with 2 1/2" exhaust with cat and straight thru turbo muffler.

When deer hunting in the freemont national forest, I averaged 24.1 mpg at an elevation of 6600ft down to 5000ft..
I have a best of 29.3 mpg and worst of 26mpg highway.
Best 25.8 city down to 20.6 mpg. At 200 ft Elevation.

I'm sure I got worse or better tanks that I didn't record! I think I got 30mpg once but can't remember.

Anything bigger than a 30 on these things with a bit of lift and mileage really starts to drop. 22 avg on mine. A LOT less when it's making boost, on 32's. Sometimes I wish I'd left it on 235's with a small lift. Probably handle a lot better. Still blown though. 

I ran 225/75s on aluminum wheels on one of my old 4 door sidekicks (4x4, 16V, 5 speed), and I would get a consistent 27-28MPG.