I need help with wheel sizes. Infinity G35.

What I have now are 20X7. There is crap for selection of decent performance tires for a 20" wheel. 

What I want is a 9" wide wheel. For that width, the offset I need is 15mm. 

What I can't decide is do I want 17", 18", or 19" wheels. 

I'm reasonably interested in aesthetics, but more interested in performance. A lot of years ago I read a article that said the best size for performance was 17". But that was in something like Super Chevy or Hot Rod. 

What is going to perform better. A smaller wheel with a higher section height, or a larger wheel with a shorter tire? 

This is what is on it now. 

I would tend to default to 18" these days, myself.  I haven't checked tire availability, but that size seems to be pretty standard in terms of performance cars for the past 10-15 years.

A 255/40-17 RE71 is ~$55 cheaper than a 255/35-18 RE71.

I see gold calipers.  Will your brakes clear a 17"?  Are those an upgraded brake?  

In reply to John Welsh :

That is the factory Brembo package. From my research a 17" wheel will clear it. I'll be doing some measuring before I order anything. 

I'd go 17" for the cheaper tires and that slight increase in sidewall makes a big difference in comfort.

My personal opinion is that a 17x9 with 275/40/17 is the right answer for almost anything. 

Matter of fact, im trying to get a set put on my wagon....

In reply to Dusterbd13 :

don't be a Bob Costas.   life begins at 315.

Go to the wheel and tire section of your CL and put in search word Nissan , Infiniti and Infinity

The 350z/370z wheels and all big Nissan or Infiniti sedan will be the proper bolt, center bore and offset.

I hear that older 5 lug Mustang may fit too.   

If buying used, drive the Infinti to the sellers house and bring a floor jack.  This will allow you to "try before buy"  

Sample:  $200

also $200

G35 coupes can fit way more rubber than what fits on a 9" wide wheel. That being said, they are absolute sweethearts when equipped with 245/45r18s on 18x9s.

The first step in selecting a wheel diameter, is selecting a tire (outer) diameter. 

My friend had NISMO wheels on his G35 and they were perfect.  I think they were 17s or 18s.

Also IIRC you can fit 245s up front and 275s out back without having to cut anything. That's a lot of rubber for a V6.

I forgot ...will this be a kinda daily driver with assorted track excursions thrown in ?? How is your tire kitty($$$$)???

In reply to 759NRNG :

Not a daily. Toy status. Cruising, mountain trips, autocross,  and the occasional track day.

Budget is $1000 to $1500 tires and wheels. But cheaper is better.

I don't want to change tires at events so a decent all around tire is required. If I burn up a set every 5k -  10k miles that's fine. 

Get a pair of 18x9 RPF1's. Light, proven, affordable, and look great on your car.  I know the 17x9 are 16lbs so they can't be a while lot heavier in 18". My buddy is an Enkei dealer I can see what he can do id you're interested. Or find a used set on zilvia. You can also find NISMO LMGT2 and LMGT3 wheels in your budget and specs. And even the LMGT4, sometimes lol.

G_Body_Man said:

Also IIRC you can fit 245s up front and 275s out back without having to cut anything. That's a lot of rubber for a V6.

Do they have less clearance the the Z?  245s seems like a very low limit.  I thought STU Zs were running 18x11s with 285s...

In reply to ProDarwin :

G35s don't have a ton of clearance up front. 255s *might* fit up front without rolling but I haven't been able to verify that yet. Out back you'd have to roll the fenders pretty hard to fit 285s.

Toyman01 said:

In reply to 759NRNG :

Not a daily. Toy status. Cruising, mountain trips, autocross,  and the occasional track day.

Budget is $1000 to $1500 tires and wheels. But cheaper is better.

I don't want to change tires at events so a decent all around tire is required. If I burn up a set every 5k -  10k miles that's fine. 

Would you consider a 'square' setup to prolong tire life (rotating)?

In reply to Driven5 :

if we knew a little more about the tire size. Size and aspect ratio +20.  Then we coul come up with some sizes that would work.

759NRNG said:

Toyman01 said:

In reply to 759NRNG :

Not a daily. Toy status. Cruising, mountain trips, autocross,  and the occasional track day.

Budget is $1000 to $1500 tires and wheels. But cheaper is better.

I don't want to change tires at events so a decent all around tire is required. If I burn up a set every 5k -  10k miles that's fine. 

Would you consider a 'square' setup to prolong tire life (rotating)?

It will get a square setup. As much tire as I can fit under the front.