I am getting 18%26quot; rims for my Mazda 3 and I heard that the size of wheels makes gas mileage worse and can make your speedometer wrong. Is this true?
Will the size of wheels on my car change the gas mileage and speedometer?
Yes....if your total outside diameter is larger than the factory size.If you go with a bigger rim(wheel)you need to get a lower profile tire.This will keep your total outside diameter the same,and your speedometer will still be correct,but the added wieght of 18''wheels will reduce your gas mileage(not too much).Your local tire store will be able to size it up for you.
Will the size of wheels on my car change the gas mileage and speedometer?
yes and it will accelerate slower as well
Yes. The difference in outer circumference of the tyres as a percentage is the % difference in speedometer. If it's larger you'll get better gas mileage. It will be minor though.
Both statements are true.
Minor variation in mpg. The speedo can be corrected to match the new size.
no, size of the rims doesn't effect the speedometer and it wont effect the mileage too much until u put much wider tiers on them. but they can badly effect the suspension system.
Yes, the larger rims will make the vehicle slower unless you get smaller profile tires to make the final diameter the same, as mentioned before.
As far as gas mileage and performance goes, it may or may not suffer. Many times after market wheels are lighter than stocks wheels even though they are bigger because they are made of higher quality and lighter metals.
If the final diameter is larger than before, it will be like having a bigger gear, which will mean the car will be a bit slower.
