Tischler

I just got some wheels for my 2003 350Z. I got a used set of 20" Axis shine for $1300 in like new condition, 80% tread too. They look great, but I noticed that the rear tires are only 30 series and the front are 35 series.

Does anyone know why you would do that? The previous owner said they came packaged like that.

Also, the rear tires are only 275 wide, and I think a 280 or 285 would look much better, not sure why they would do that either.

I don't think it's due to rubbing, mine is at stock ride height and they rarely rub on a deep bump in the front, rear is fine though...

Thanks for any help!

Mike

bmccann101

iTrader: (16)

hmm, sold my Axis 20 ( VIPS) for 400 bucks so dunno.

http://1010tires.com/TireSizeCalcula...p1010tires.com

you have not noted the width of your fronts, so again, dunno.

If your fronts are bigger than your rears, you are in for trouble w the VDC and/or traction control. Not sure what you have.

DavesZ#3

iTrader: (26)

The profile is meaningless by itself. When you take it into account with the section width, then the picture of "why" makes more sense.

It's a way of adjusting the OD of the tire to try and maintain the same as OEM setup.

bmccann101

iTrader: (16)

yeah if hes rollin 245 35 20 and 275 30 20 hes still bigger up front...

i ran that before, looked weak imho. Your rear size is fine OP, drop to a 30 series up front and it will look much better. btw you start getting pricey after 275 in a 20 inch tire.

Tire 1 - 245/35R20 >Search Tires Tire 2 - 275/30R20 >Search Tires
Section Width: - -
Section Width: 9.64 in 245 mm
Section Width: 10.82 in 275 mm

Rim Diameter: - -
Rim Diameter: 20 in 508 mm
Rim Diameter: 20 in 508 mm

Rim Width Range:
Rim Width Range: 8 - 9.5 in
Rim Width Range: 9.5 - 11 in

Overall Diameter: - -
Overall Diameter: 26.75 in 679.45 mm
Overall Diameter: 26.49 in 672.84 mm

Sidewall Height: - -
Sidewall Height: 3.37 in 85.598 mm
Sidewall Height: 3.24 in 82.296 mm

Radius: - -
Radius: 13.37 in 339.59 mm
Radius: 13.24 in 336.29

DavesZ#3

iTrader: (26)

OP - post wheel widths and offsets along with tire widths. That's what is needed to get an accurate picture of the setup.

Tischler

20x9 front.
20x10.5 rear.

The dash is light free, so it's not the sizing I'm wounding about.

Just curiou as to why you wouldn't get 35 series all around...

Tischler

20x9 245/35 +15
20x10 275/30 +20

terrasmak

iTrader: (8)

People do that because
1. Clueless and just order tires that would work for most cars where the sidewall height is the same front and rear.
2. Because they want the sidewall to have the same look front and rear cause they think it looks better.

davidv

iTrader: (2)

Front tire is taller than rear.

DavesZ#3

iTrader: (26)

What trim level is your Z? Base? Touring?

If you have TCS or VDC, you might want to read this before you put those wheels/tires to use...

https://my350z.com/forum/showthread....1&postcount=45

glenns280

op my wheels/tires 245/35/20 an 275/30/20 were the same size came like that as a package deal when i bought the wheels.I have a grand touring with traction control it caused no problems for the 3 years i had them on the car. You will be fine.If you dont like the look change it,if you do keep it..

Tischler

Interesting.

I've driven on them for about 60miles and not even a blink of vdc/slip on the dash.

Based on those calculators my current stagger is .3"(probably more with the tread being slightly less in the rear).

If I switch to:

285/30 no stagger
285/35 1.1" stagger
275/35 .8" stagger

I think the 285/35 or 280/35 would be the best look. Is 1" of stagger too much?

Glenns280, I agree.
Terrasmak, lol.

Tischler

It's a grand touring. Fully loaded.

Tischler

Thanks DavesZ, that makes a lot of sense. If I go with a 280/35/20 in the rear I will end up with .9" stagger, right in oem recommended range of 1/2"-1".

Maybe when it's time for new tires I'll do that.

Thanks for all the great info. Really helpful. I didn't even consider a lot of that.

Tischler

Also, I'm guessing I'm not showing a vdc/slip light now because the fronts are actually bugger than the rear, and have more tread, creating enough stagger...

davidv

iTrader: (2)

Did not know there is a Grand Touring for 2003.

davidv

iTrader: (2)

Facts always helpful. Do you drive a Touring with automatic or manual transmission?

terrasmak

iTrader: (8)

I would just run the 275/35 out back, or keep the 275/30 out back and swap the front tire to a 245/30

Tischler

You could be right. It's def touring. Came with the 6 spoke 18's and fully loaded.

I think I'll just up the rear to 35 series once I need a new pair. For now it doesn't look that bad, and there is a solid amount of tread left.

I'll post some pic's later tonight for you to see

Btw it's a manual, of course.

Czarrr

iTrader: (4)

I couldn't help but chuckle a little bit.