does anyone know the advantages/disadvantages of installing 275/40-17s on the rear of a G35 coupe?
I'd like to go wider but want to keep the OEM 17" rims.

 

if you have the stock 17" rims for the coupe, the widest you can go is 245.. if you realli want a wider stance, i would jus go with aftermarket rims.. that's what i did..

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Iiu69 is right, however I know of no tire maker that makes a 245/50 tire in a 17" (the largest size you could use). In fact I know of no 17" wide tire made that has a 26.7" OD, the OD you would need to match stock. A 275/40 measures 25.7" (too small an OD). You would lose the stagger, and the wheel/tire combo would look funny in back. If you were to use the 275/40 tire, you would need a 9.5" rim. 1.5" wider than what you now have, otherwise you would have substantial side wall buldge - it would not be safe. You would need to move to 18s of you wanted to go wider

 

cool, I was lookin to do the same thing. Lemme know how it turns out

 

Advantages- more grip for launch, less tail wag

Disadvantages- less neutral handling, no tire rotation (maybe side to side depending on tires)

http://www.wheelspecs.com

 

thanks for the input. & you're right about the 245/50-17. I do see a lot of 245/45-17s.
If I go with these, I understand that will 'overstate' my odometer somewhat; but aside from that, there's no compromise on performance or safety, right?!?!

 

do you have pics?
also, what tires did you go with on the 18s?

 

Here are some 245/50's available for a 17" wheel.

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2004 Diamond Graphite Sedan

 

GrandMaster's right - There are some. I didn't do a search, should have. Sorry. Not a great selection, but there are some. The best buy seems to be the Dunlop SP5000s. I just bought a set of SP9000s for my 18" Nismos. Nice handeling tire and a good buy. The best handeling tire in the list would be the Michelin's, but I don't know if you want to spend the money, and they might overpower your front Goodyears. However, if you did get the Dunlops you could never get a matched set, 225/50s front and 245/50s rear. The only tire that you could match would be the Michelin Pilot Sport AS (I did do a search). Don't do an "H" rated tire. 245/45 would work, but they would destroy the stagger and upset the VDC. Since they are an inch lower in the rears, they would look funny (too small).

Lou

 

I hear ya...but if I change the fronts also to, say, 235/45-17, would you have the same concern about the stagger/VDC?