I replaced my 235/50VR-17's in the rear on my coupe with 255/45ZR-17's. I have had no problems. My speedometer should still be correct, right?

2003 Blk/Blk Premium w/navigation
Tinted Windows
Chrome Wheels
BRM Catback Exhaust
Injen CAI
Unorthodox Crank Pulley (on order)
Clear Corners
Grounding Wires
255/45ZR17's rear

 

It should be really close. About 0.8% smaller in theory, that varies depending on actual tire models. When your speedometer reads 60, you'll be going 59-1/2. Big deal, right?

[ur]=http://www.miata.net/garage/tirecalc.html]Tire Size Calculator[/url]

 

I am sorry to come back on your 03/31/04 post but I just got my G35 with the 18' wheels. How wide did you go on your tires, keeping the same rims?

 

Go to www.tirerack.com. Choose your tire. Click the "Specs" tab and it will list permissible rim widths for your tire. Tires vary by manufacturer. You can put the front Pilots on a 8.5" rim for instance, and the rears on a 9". Every tire has a range. I used this to determine that I can go with an 8.5 in the front and a 9 in the rear and keep my stock tires.

If you want to replace your tires with wider tires, make sure you pay attention to weight. The pilots are among the lightest, the Bridgestone Pole Positions among the heaviest. You will notice. You will also notice performance variances depending on what you do to your tire widths, so make sure you define your mission first.

Do you want to drag? Drift? Corner? Looks only? Contact patch alterations will cause differences in performance.

2004.5 Coupe/5AT/Ivory/Everything but front spoiler/Nismo CAI/Crawford V5

 

Is there any good sites on tire weights? I know Toyo T1 is pretty light, and the S-03 are pretty heavy. I am trying to calculate how to go 19" without performance penalty.


CPV35 G35C Maliblue

 

235/45/18 is correct to up size. Your best bet, to always be sure is to go to Tire Rack and they will advise the correct rim and/or tire size, be that 16, 17, 18 or 19. Take care. Just ordered my Enkei rims! Nice.

 

LOL. man, this is an old repy, 12-31-1969, must have been a psychic!

 

Whats up yall, I am a new member on this site and a proud new owner of a MT G 35 coupe. just wanted to introduce myself, here is a pic of my ride

 

Hi,
1st post!!!
I own a 2003 g35 coupe, purchased nov 2002.
I replaced my goodyears with Michelin pilot sports.

Stock 17 in rims:

Front 245/40 r17 (7.5in wide rims)
Rear 255/40 r17 ( 8in wide rims)

almost 2 years and no problems, ever.
great tires too, by the way, great traction

i'm actually lookin into putting 275's on the back. yes,yes I know everyone might think they wont fit.... but.... a freind who also auto-crosses his 350z has 275's, are you ready for this..... all the way around!!! no problems yet in 2 seasons of soloII.
the recommendations the manafacturers give are alittle on the safe side, for there protection and ours. But they can be stretched alittle...

hope this helps

 

Welcome =)

Selecting tire width is generally pretty straight forward if you know your rim sizes. I would not recommend 275's on an 8" rim, that is just a bit too much rubber for that width wheel. Sure some people do it, I also see guys wearing white socks with sandals, but you will never see me doing it I can tell you that much =)

For more details on selecting tire widths, here is an example I posted in this thread that shows the simple math used to figure out the best width tires for 18x8 wheels:

 

I just put on a set of 235/50/17's (Pilot Sport A/S) to replace the POS stock Turanza's that came on my '05 G35x. They look awesome! We should be getting some nasty weather tonight so I'll see how much better they perform too..

 

I've been reading some posts and some people are putting the wierdest tire sizes on their rims/cars. Although this site I am providing says 'Miata' it's pretty accurate and should help EVERYONE!! You will then find out how your wheels offset your speedometer when you add wheels that are not supposed to be on your car.

<a href=http://www.miata.net/garage/tirecalc.html>http://www.miata.net/garage/tirecalc.html</a>

The second link is for rim weights, either factory equipment or aftermarket wheels. I don't know how accurate this site is, but should give you a pretty good idea of rim weights out there.

<a href=http://www.wheelweights.net/>http://www.wheelweights.net/</a>

ENJOY!!


It's still a G thang!!

 

Does anyone know if you must use the same size rims on the front and rear ?
Also, has anyone weighed an OEM rim (17" or 18")? These weights are not available in any of the links or on the Infiniti site.

 

no you do not. Many people with vette use 17's & 18's. They do this to keep the profile (height) of the sidewalls looking about the same, otherwise the tires(rubber) doesn't look right on the rim.
just mailed 2-17in X 7.5 rims 46.5lbs with box. so 1 rims should be ~ 22lbs

 

Shoof, how do you like the new tires? How is the Plus 0 working out for you (215/55/17 to 235/50/17)? Have you experienced any rubbing, tramlining, or any other problems?