kirax105strike

i know everyone always says how 20's effect mpg and speed but how much do they specifically. anyone who can tell me from experience is greatly appriciated.

jahudso2

I can't tell you from experience, because I still have the stock 17" wheels, but when you go to a big shiny 20" chrome wheel, you add a lot of weight. Weight is bad for fuel economy and performance no matter where you put it, and the wheels are one of the worst places to gain weight. The heavier wheels require more force in order to spin at the same speed as a lighter wheel, therefore a car with the same power will be faster with lighter wheels than if it had heavier wheels. The 20" wheels really kill your drag times because in order to get a good launch, you want a lot of tire sidewall. The smaller the wheels you have, the more sidewall you have (assuming you keep the same tire diameter). You want sidewall because then your tires can flex on launch and wont spin, therefore lowering your time.

grampa_stang

Your driving style as alot more to do with it than 20's. And...if your 20's actually weigh less than say 18's..well, there you go. It's the overall weight that hurts...not the size.

05 Mustang

with my heavy 20's, I get around 18-20mpg around town and 25-27mpg on the interstate

Allstar

i wouldn';t imagine a huge difference in mpg..

and like stated earlier.. has nothing to do with wheel size, it deals with rotational mass.

deekum1627

well i have a truck with much bigger tires and rims and there alot heavyer so it does hurt me alot, and it takes more power to turn them. so it depends on weight and it also depends on your gears

DJStile

When I switched from my 17s to my 20s, there was no difference at all in MPGs.

o7 tungsten

i lost about two or three mpg's when i went from 17 to 20.

nmd55

i just got 20s installed today, when i was driving home the tire pressure monitor went off.
Can this be fixed, or do i just have to deal with this.

sorry for hijacking didnt think it was worth starting a new thread.

o7 tungsten

did you transfer your tpms sensors?