What is the widest tire I can put on the OEM 17" Sport wheel for 2004 G35 Sedan without rubbing issue? I decided not to upgrade my wheel as I'm already thinking about tradin my G for something bigger. No idea yet for now.

 

The OEM 17" sport wheels on a '04 Sedan is 7" wide. Thus, the recommended widest tire without bulging would be a 235 series tire, namely 235/50/17 if you want to keep the speedo as accurate as possible. But if you don't care about bulging at all and want to fit the widest tire for aesthetic reasons without rubbing then you could probably get a 245 or maybe even a 255 tire. I wouldn't recomend this though on a 7" wide rim.

 

the most 235/50/17 is the correct size to go wider

 

How bout a 235/45 R17?

 

wow, 235 on a 7" width wheel??? kinda overkill imo. however, i wouldn't know too much because mine are 9.5 / 10.5. but, i did have 7" on my lude long ago. i ran a 215/40/17 on them and they weren't stretched, nor bulging.

 

The tire diameter will be 3.74% smaller than the OEM tire which means that if your speedometer reads 60 mph, your actual speed is slightly over 62 mph. The diameter difference from the OEM tire should be less than 3%.

 

Anyone got a pic of a 235 on a 17X7 wheel? Thinking of going wider myself. Extra traction is offset by a 2 mpg loss I hear. So how much more traction is it and is it worth is my current dilema.

 

I am running 245/45 on a 2003.5 with stock 17's and so far no problems. Yes the speedo is 2mph off but thats not to hard to remember.

 

I'm running 235/50 right now, and before those I ran 245/45. The 235's stick out more. It's down to the tire model...

Both sizes work well though. IMO the 235/50 is the IDEAL tire size for the OEM 17" rims. 245/45 is pushing it, and I wouldn't go any wider than that. (I don't even know if i'd do 245 again)

Find you a good square-sided tire (no donut-lookin tire) in 235/50-17 and you'll be golden.

 

Doogie...noticed any lost in mpg's with the new shoes?

 

any difference in MPG noticed between the three sizes would more likely be explained by measurement errors caused by different OD sizes of the three (OEM, 235/50, and 245/45) sized tires.

My MPG has remained the same throughout all three sizes.

You'll notice more of a difference due to inflation pressure than you will with tire widths.

However, I DID notice a very obvious difference in feeling of lateral stability and traction with the three sizes. The 245s felt very planted, the 215s weren't grippy and steering felt too light, and the 235s were somewhere in the middle (obviously).

 

I agree with you about the firmly planted(245\45 17). I am running the Kumho ASX with 32lbs in currently and that seems to be about right. On the 2 fairly cool mornings (34-36) they seem to take a few miles to get rid of the flat spot from setting overnight but I expected that from other reviews on the tire.So far I like them better than the stock Goodyears but only time will tell, I only have a little over 800 mile on them. Infiniti changed the pads and resurfaced the rotors last week(For Free) and between that and the fat tires it will sure stop on a dime.

 

I have the 235/50/17 Pilot Sport A/S and it has cost me a few tenths of an MPG long term. No issues with these whatsoever and they were cheaper than the GSD OEM replacements. So I got more for less.

Ken

 

Most 235/50R17s are a perfect match for the OEM tire diameter. Overall, the 235 will add about a .5" wider contact patch. The downside is most 235/50s weigh in the neighborhood of 28-30lbs or about 2-5lbs more than a 215/55R17. The additional weight isn't huge, but it is additional rotational weight and it's being added to the worst part of the car.

 

Just wanted to thank all of you guys for your input. I was just thinking of getting wider tires and you guys just answered all of my questions. Thanks again.