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ZUKIWORLD Discussion Forum => Technical Discussion - Performance / Modify => Topic started by: WVzuk on December 22, 2011, 05:08:36 PM

Title: What kind of gas mileage do you get with bigger tires?
Post by: WVzuk on December 22, 2011, 05:08:36 PM: 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?
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: beagle..t on December 24, 2011, 11:23:23 AM: well i got 30x9.5x15 ats and get around 400 kms to a tank with a 1.6 8v 5spd on a 91 tracker
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: bentparts on December 25, 2011, 05:03:57 AM: If everything else is stock probably in the mid 20's.
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: WVzuk on December 25, 2011, 07:16:16 AM: 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. :)
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: Drone637 on December 25, 2011, 03:13:34 PM: 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.
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: Dayton86 on December 25, 2011, 08:04:36 PM: 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.
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: tuxblacray on December 26, 2011, 06:48:31 AM: 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 .... :laugh:

In the Midwest it is commonly between the point of about a $.30 increase from the time before... :'(
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: rluka on December 27, 2011, 03:06:38 PM: 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
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: Dayton86 on December 27, 2011, 05:04:54 PM: Bigger tires mean more weight, usually they are wider and have an aggressive tread pattern so it has more rolling resistance.
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: albertcrony on December 27, 2011, 09:03:32 PM: 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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Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: tuxblacray on December 28, 2011, 01:26:52 PM: 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.
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: KJMac on December 28, 2011, 06:21:00 PM: 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.
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: bentparts on December 28, 2011, 07:14:13 PM: 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. ;)
Title: Re: What kind of gas mileage do you get with bigger tires?
Post by: Skyhiranger on January 01, 2012, 08:40:31 PM: 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.