is it true that bigger rims and fatter tires affect mileage?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meangreenEG &raquo;</TD></TR><TR><TD CLASS="quote">is it true that bigger rims and fatter tires affect mileage?</TD></TR></TABLE>

Yes, and it will also affect your speedometer reading

 

No, it's a total myth, run 22" wheels and 70 series tires and your gas mileage will stay the same.



Yes, it will mess up your milage and your speedo reading.

 

does it actually decrease mileage ?

 

Didnt they just say yes 2 times? Do you not believe them? Find an offroad site, join, and post this exact same question and see what responses you get from people who raise their trucks with larger rims/tires and keep their stock gear ratios.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meangreenEG &raquo;</TD></TR><TR><TD CLASS="quote">does it actually decrease mileage ?</TD></TR></TABLE>

Yes, it's much harder to turn a bigger wheel.

Do you have any concept of physics?

What is key is the total wheel/tire diameter, 16" wheels with the appropriate tire size will get the same milage/speedometer reading as my stock 14" wheel with OEM spec tires.

 

A heavier wheel/tire combo will require more power to accelerate to a given speed than a light wheel/tire combo because they have more inertia. This higher power requirement translates into more gasoline used. Likewise, a heavier combo will require more braking force to slow down.

Another factor that negatively affects gas mileage is underinflation.

This doesn't mean you can just slap on tiny wheels with low profile tires and expect to get great gas mileage, because that would require your engine to rev higher to go the same distance. Don't forget that your transmission's ratios were designed to work with a specific size tire.

 

i was reading an article where ppl in japan use really skinny tires and overinflate them with thier hybrid cars to increase thier mpg.

like ekforeverguy said, you can change the wheel and tire size as long as its within spec height of oem remmomendations to insure proper odo readings.... and i believe the wider the tire is the worse gas mileage you will get because of increased road friction and the added weight, however corners will love them.

 

yes to all, I check mine every other day.
and part of my routine maintence.