I'm a little disappointed with the few tires available in the stock 215/55 R17 size, so I'm thinking of buying new 18x8" rims so that I can put 225/45 R18 or 235/45 R18 tires on them. Has anyone done this? Any advice? I don't want to degrade anything, like the VDC, speedometer accuracy, handling, etc...

Thanks,
John

 

If you want to keep the stock rims, you can go 235/50R17. Just keep the wheel diameter roughly the same, and be aware that Infiniti officially claims 225 as the max width for the front, but a little wider is probably okay. Check the Wheels and Suspension forum for more tire-based info. Especially the link to the tire size calculator. I think 235/45R18 is another size that's hard to find, but 225/45R18 (and 235/50R17) provides some good performance tire choices.

I haven't done it myself yet, the original tires still have plenty of tread left. But check the Wheels & Suspension forum.. many have already been where you're going.

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

 

I konw if you search the wheel forum you will find a site that calculates the wheel diamiter and tells you how much your speedo will be off...

Let me know if you cant find it..

..pestilence..

 

I'm in the process of fitting 18's right now. I'm going to run Enkei RPM2's on 245/40-18 kumho MX tires. As a precaution I only ordered 2 wheels and tires, I wanted to see how that width would clear with a 245/40-18" tire and a 45mm offset. Because I did not want to run 35mm offset I special ordered the rims in 45mm offset and I ordered a 5mm H&R wheel spacer just in case I need to bring the wheels 5mm out. Turns out they just barely clear the suspension on the front, but they do and thats all that matters. In the rear, they clear with allot of room to spare. In fact with a 9" wide rear rim matched with a 45mm offset a 265mm rear tire would be no problem. When these tires wear out, I will order Bridgestone S03's and run 245/40-18 in the front and 255/40-18 in the rear.

 

John, I went through the whole process a couple months ago. 18" have the best selection of tires. The closest ones to the original diameter would be 235 45 18. I ended up going with the 235 50 18 because I got a great deal on some bridgestones. The diameter was actually increased by .9 of an inch. My heavier chrome rimes and wider tires have affected my mileage and acceleration just enough so its noticable. Although the wider tires are a smoother ride and better handling and the rims look premier. So it was a slight tradeoffs. I'll tell you one thing, it still drives like a G35!

 

hey i have some 18 235 40 18zr nittos tires for sale , email if your intersted for pics and prices

rino002@aol.com

 

Hey Dave, Can we see your car with the 18s and new rims?

'03 Premium, Xenon, chromed factory rims, last Twilight Blue in Chicago

 

I have 18X8 AT Italia Flash Sports with 235/45-18's and love them. I have Continental Conti Contact 2's (or some such goofy name).

Here is a picture (hope this works)...



45520-side7-8over.jpg

 

Here is another pic that shows the tires filling out the fender a little better...



45521-rrdownsideclose.jpg

 

Anyone know the offset of the stock sport 5-spoke rims?

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

 

hi:
What about the 18" G35 coupe OEM has anyone done this on a sedan ?

 

The above is a pic of crea's ride. The ride shown is lowered with HKS coilovers. I think they look pretty nice.

Limited Edition Twilight Blue / Premium / Graphite / Xenons


47364-fc77eac6.jpg

 

The coupe's rims are staggered, the sedan's rims are the same size front-to-back. The sedan's VDC system supposedly cannot handle different-sized front and back tires. I suppose if you could get 2 half sets of coupe rims (say, two sets of front rims, for instance) you could do it.

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