G37 19x8 or 19x9

[squiggyacfd]

Decided to post here since I am talking about G37 wheels. I have an EX35 and want to upgrade to a 19" wheel. Finishline wheels has G37 refurbs. I want to put a 245/45/19 tire on these wheels to keep the diameter identical to stock. Would you buy 4 of 19x8.5 or 4 of 19x9 G37 wheels for this tire size? Also, please let me know if I am an idiot and these tires wouldn't work at all. I am thinking 19x8.5 cause they will be a little lighter........Thanks in advance
Modified by squiggyacfd at 5:47 PM 5/11/2009

[G_whizz]

Try using this tire size calculator.

http://forums.g35club.org/zerothread/350713

[squiggyacfd]

Try using this tire size calculator.

http://forums.g35club.org/zerothread/350713

I think you misunderstood me. I already have used the calculators and know that a 245/45/19 tire will be the exact size in diameter as stock. My question is, would you buy 4 wheels at 19x8.5 or 4 wheels at 19x9 for this tire size? Because I am AWD, I was told I could not stagger my wheels like the G37S...ex. fronts 19x8.5 and rears 19x9 or could I, if I kept the same tire size for fronts and rears?????

[TJHG37S]

Either would work, personally I'd go with 19x9s as wider is better

[TISon28s]

If you're going to do only 245's, stay with the 8.5's. You won't need the extra inch an a half of weight on your rims. Also, THey'd probably look better (8.5), instead of having a wide rim with a small tire. I kinda like the rim gaurds showing on my tire. Your 8.5's should be good for 265's as well, if you want to get that for the rear.

---I'm a Tire Tech.

[pfarmer]

I think you misunderstood me. I already have used the calculators and know that a 245/45/19 tire will be the exact size in diameter as stock. My question is, would you buy 4 wheels at 19x8.5 or 4 wheels at 19x9 for this tire size? Because I am AWD, I was told I could not stagger my wheels like the G37S...ex. fronts 19x8.5 and rears 19x9 or could I, if I kept the same tire size for fronts and rears?????

I would go with the 8.5 inch wheels. The recommended rim width for common 245/45/19 tires is 7 or 7.5 (depending on source) to 9 inch. I believe you would benefit by the reduced weight as well as possibly extra protection the tires would give to the rims.

Perry

[biggie]

I would probably do the 9" wheels. I have 235s on a set of 17x9 and I think they look about right, so the 245 on 8.5 may be too much.

[pfarmer]

Decided to post here since I am talking about G37 wheels. I have an EX35 and want to upgrade to a 19" wheel. Finishline wheels has G37 refurbs. I want to put a 245/45/19 tire on these wheels to keep the diameter identical to stock. Would you buy 4 of 19x8.5 or 4 of 19x9 G37 wheels for this tire size? Also, please let me know if I am an idiot and these tires wouldn't work at all. I am thinking 19x8.5 cause they will be a little lighter........Thanks in advance

Modified by squiggyacfd at 5:47 PM 5/11/2009

Based on what I have been seeing from various sites it appears that this is somewhat based on brand. But the minimum rim width appears to be either 7 or 7.5" and the maximum appears to be 9 or 9.5". What seems to be somewhat consistent is the recommended width of 8.5".

Based on this I would tend to go with the 8.5 for performance purposes of the tires, the brakes, unsprung weight, etc. I don't think you would notice much if any difference in looks. As long as the offsets, etc. are on your side this would certainly be my choice if going with 19s.

Perry

[TISon28s]

I've had 10" wide rims before with the stock setup, with no spacers.

[Tampa G35 Sedan 6MT]

I would go with a 9.0 and then use a wider tire like 275 or 265 or even 255

DJ

[biggie]

I would go with a 9.0 and then use a wider tire like 275 or 265 or even 255

DJ

255 would be the absolute widest I'd go on a 9.0 inch wide wheel. And that's going to be 'overhanging' depending on profile height. Like I said the 235s on my 9" are pretty square with the wheel.

[pfarmer]

255 would be the absolute widest I'd go on a 9.0 inch wide wheel. And that's going to be 'overhanging' depending on profile height. Like I said the 235s on my 9" are pretty square with the wheel.

If yours are 235/35 then the recommend width seems to be about 8 - 9.5 inch. For 255/40 8.5 - 10 inch seems to be the general size recommendations. Anything under 40 profile indicates a 9.5 is in order.

For a 245/40 it appears the range is 8 - 9.5. While the larger size appears to be ok to use 9" I would go with 8.5 for the lower unsprung weight which will probably translate to better handling, better braking, better straight line performance, and little difference in appearance.

Perry

[biggie]

For the record I have 235/45/17 on a 17x9 wheel.

[Tampa G35 Sedan 6MT]

yea see i would go upto 275 on a 9' wide tire. The difference in with is about 3cm accross or 1.5cm on either side wider than the 245.... Never going to make that big of a difference! Just look better as long as you don't have clearance issues.

[Tampa G35 Sedan 6MT]

I have one question...

First questions: Why in the world did you buy an Ex and not a G if you were going to be wanting a sports car....

Next question: How old are you?

Last question: Is answered by the previous one if you are over 40 and that solves the entire problem....

DJ

[pfarmer]

For the record I have 235/45/17 on a 17x9 wheel.

Recommended rim width of 8-9.5 inches.

Perry

[Sentientbydesign]

Anybody want to offer some advice and not just a bunch of opinions?

The difference between the 8.5 and 9 is going to be negligible. The 9 will be slightly heavier and will make the tire look slightly stretched. The 8.5 will be lighter and will probably be flush or slightly bulged.

I would look into which will be more flush with your fender.

Last thought. If you stretch your tires, you run the risk or scraping the wheels more so than if you run a flush setup, or slightly bulged.

[pfarmer]

Anybody want to offer some advice and not just a bunch of opinions?

The difference between the 8.5 and 9 is going to be negligible. The 9 will be slightly heavier and will make the tire look slightly stretched. The 8.5 will be lighter and will probably be flush or slightly bulged.

I would look into which will be more flush with your fender.

Last thought. If you stretch your tires, you run the risk or scraping the wheels more so than if you run a flush setup, or slightly bulged.

The 'recommended size' I have been referring to is from various tire/rim dealers as well as tire manufactures. Some vary a little bit but most are within a half inch of the rest of the bunch.

I would go with the recommended size for performance reasons. With similar offsets I doubt you would see much of a different as far as flush with the fenders as the difference in rim width would be 1/4 inch for the examples given.

I agree with the statement about scraping. In fact I would most likely have damaged my passenger rear wheel just tonight when I cut a corner in a parking lot a little bit too close and rubbed the tire. I have also seen damage to tires from potholes that just may not have occurred if the tire was bulged just a little bit. One of the biggest considerations may well be keeping the tire sealed on the rim in the case of hitting something on the road. I have seen a fair share of tubeless tires going flat with something as simple as hitting a bump in the road.

Visually I think 'too wide' has a sort of Hot Wheels or Matchbox look to them.

Perry