I was wondering if anyone has any experience doing 245 tires on their g35s sedans all way around. I'm going to just buy a new set of rears since the fronts are still good but I was wanting to know for future reference if there would be any issues in putting 245 width tires on all fours. I'm looking to prevent constantly having to change the rears of the car 2 to 3 times more than the fronts. Any issues in terms of spacing in the front? I'd either buy a new set of rims that are 8.5 wide since that's what the rears are and putting the tires on or buying a second set of rear rims to use up front. I'm only considering doing this when I have the money saved up to do so. Mainly so I can rotate the tires and save some money in the long run.

On my previous 06 G35 6sp manual I replaced tires three times with 235-45-18.
The first OEM Bridgestones Turanza's were replaced at 47k miles and at 100k miles
At 143k miles the Bridgestones were replaced with Michelin that were still on the car when I traded it in at 171796 miles.
Not sure why you want a wider tire but I got excellent mileage and performance out of the 235-45-18 tires.

Telcoman