fuel consumption.

[jmony55]

this is probably a basic question but, how does adding a bigger set of wheels [20"] affect your XR's fuel consumption (increased/decreased) mpg? :hmmmm2:

 

[stretch200]

I'm pretty sure it increases mpg. Because a bigger tire means more rubber which means longer distance with the same RPMs.

 

[XrunDan]

Well, not true, because it is a bigger wheel, it will take more force to turn it and keep it turning, resulting in a decrease of MPG.

 

[stretch200]

Well, not true, because it is a bigger wheel, it will take more force to turn it and keep it turning, resulting in a decrease of MPG.

true. But then it comes back to how you drive. If you drive in the city with a heavy foot then yes. less mpg. But if you do a lot of highway and don't have a heavy foot, then good gas mileage.

 

[X-Rizzo]

I'm pretty sure it deceases it. Think about big lifted trucks and how they get horrible gas mileage once they have larger diameter wheels.

 

[XRunninTaco]

I'm pretty sure it deceases it. Think about big lifted trucks and how they get horrible gas mileage once they have larger diameter wheels.

yeah what he said :top:

 

[X-Rizzo]

Yeah cuz I remember on my old truck when it was stock I got decent gas mileage and once I lifted it, it got noticeably worse.

 

[jmony55]

so dropping the XR and getting bigger rims wont significantly alter your MPG?

 

[X-Rizzo]

How big of rims?

 

[Jonathan]

its not the rim size, its the OD of the tire that affects gearing. in many cases, taller gears will help with mpg. if the rims are much heavier, that will affect the mpg in a negative way. i did not notice any difference with mine.

with lifted trucks the largest reason the loose mpg is the undergear the truck too much, but the main reason is aerodynamics. the higher they go, the more air they push and that REALLY hurts mpg.

 

[REG CAB X]

Yeah cuz I remember on my old truck when it was stock I got decent gas mileage and once I lifted it, it got noticeably worse.

When lifting a truck the bigger cause of bad mileage is the fact that there is more wind resistance because parts of the suspension are hanging down under the body. This also allows more air to be trapped under the truck (kind of like a parachute). I have lifted several trucks and have compensated for bigger tires with regearing the differentials and they still got worse mileage than stock height.

As for the XR I don't think you will be able to fit a much bigger tire that would cause a big difference, unless you go with some heavyass 22 or 24's. I would say you won't vary more than 1mpg either way.

 

[fbjxr]

reg cab x took the words right out of my mouth.:top:

 

[jmony55]

thanks for your response everyone.

 

[rx-runner]

well i get around 250 miles a tank and i have 20s

 

[07xrunner]

well i get around 250 miles a tank and i have 20s

wow i get 350 to a tank :hmmmm2: