I want to put 245/40/17s on the rear of my 2008 g35x... can I and still get good gas milage efficiency ?

 

It's only about an 1" wider so it should fit but it's going to make the speedo read about 5mph too fast and the slight extra drag with the width will affect the mileage a little but they get lousy mileage anyway so we're used to it, right?

 

Bro ....

225/55/17 is 3.7% BIGGER than
245/40/17 which is ovb 3.7% smaller on your REARS

I don't get why you'd want that

 

If you use staggered tires that are greater than 3% difference in size you will set off the VDC system.

 

[QUOTE=Antonk;7178703]I want to put 245/40/17s on the rear of my 2008 g35x... can I and still get good gas milage efficiency Okay...will 245/45/17s work front and back on my 08 g35x sedan...