Someone told me that sedan's VDC system supposedly cannot handle different-sized front and back tires. that if I want the oem 18" should get 2 pairs of the front rims, does anyone has the 18"wheels in a sedan? Is this true? Any comment or suggestion

 

No its not true, I have the M45 wheels on my sedan with 245/45/18 S03's and the car rides 100% Better!

 

He's talking about coupe rims. The M45's 18" wheels are the same width, front and back. The G35 coupe has wider rims and tires in the back than in the front. This isn't a good idea on the G35 sedan, the front and back should remain the same.

I think I'm the one that mentioned the VDC problem to you. It's something I'd heard on these boards awhile back, and a service advisor at my dealership confirmed it, for what that's worth.

I suppose you could use two rear sets of coupe rims, too, depending on how wide you want your tires to be. Infiniti recommends a max width of 225. 235 shouldn't be a problem. A few people are going 245, as well, but I wouldn't go that wide on my car -- not sure if it'll rub against something. You might also want to look into aftermarket rims. You can probably find something cheaper and/or lighter weight that looks just as good. tirerack.com and discounttiredirect.com both can filter their inventory by what fits on your vehicle.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

GIlovemycar
The fact is that the 18" coupe rims are stagered they are 225/45R18 W-rated front tire and 245/45R18 W-rated rear tire, I'm not sure if the diference is only on tires or the rear rim is wider.

 

I believe the rear rim is wider. There's a peg in the front wheel to prevent the rear rims from being mounted on the front axle. I can't seem to find the specs on rim widths for the coupe though to confirm this.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

Everyone I talked too about putting these wheels on the car told me to stagger the front and back, but I did not want to because of not being able to rotate them.

 

I read on some posts prevoiusly on this board that roating dosen't save that much tire... I was told that if you keep them at the correct pressure you should be fine..

 

if you stager the sedan, cant you just bring it to the dealer and have them re calibrate it?

 

All the rims are the same on the coupe. The tires are the only thing different(front vs back).

 

I don't think the VDC is something the dealer can recalibrate. I was told that the module was programmed differently for the coupe.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

Are you sure that only the tires are different ? Cause in that case we can buy the set and change the rear tires.

 

Yes the rims are all exactly the same. Many people have put the 18's on thier sedans already. Just get rid of the staggered tires.

 

Which tires should I replace the front or the rear? Or u recommend other size?

 

You shouldn't have a problem either way. Of course the safer size would be 225/45-18 as it's a little closer to stock and the narrower tire definitely won't cause any rubbing problems. Depending on the offset, etc., the 245/45-18s should clear okay though. Check with your tire dealer to be sure and do a test fit

<font color=green>GG</font color=green>

 

Hey, guess what I just discovered. It's amazing what happens when you read the manual. Page 10-8.

The coupe 17's are different widths, 17x7.5 front, 17x8 rear. The 18's are 18x8, front and rear, 30mm offset. (The sedan 17x7's are at a 45mm offset.)

So, the concern I raised was moot for the 18's. You will want to run same-sized tires, though, whichever size you do pick.

Too bad they don't publish the rim weights in that handy manual....

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter