370z MEATY TIRE THREAD

[cjr1881]

Originally Posted by Rockcrawler

anybody notice effects on mileage? just curious on the measured impact more than "yes, wider= worse mileage"

just ordered some Conti DWS (what's right for me and my use) in 275/295 and they will go on next week after my Rays are PC Black stardust.

went wider for a variety of reasons, but most of it for "percieved" added wheel protection margin....

Why would you get worse gas mileage from wider tires? I don't see any logic behind that reasoning. My mileage avg i think has gone slightly down, but that is only because I am actually running tires that are about an inch taller in diamater than stock so my speedometer says I am going slower than I am and therefore showing less miles traveled than actual. I know tires have different roll resistance but the mileage would be negligible.

[Robert_K]

Originally Posted by cjr1881

Why would you get worse gas mileage from wider tires? I don't see any logic behind that reasoning. My mileage avg i think has gone slightly down, but that is only because I am actually running tires that are about an inch taller in diamater than stock so my speedometer says I am going slower than I am and therefore showing less miles traveled than actual. I know tires have different roll resistance but the mileage would be negligible.

Actually it can happen. When you increase your rotational mass the engine has to work harder to spin the wheel and tire. As well as your brakes work harder to stop it from spinning. A lot more goes into a wheel/tire set-up than looks.