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side wall height? 18x8.5", 19x10"

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Old 11-28-2009, 05:25 PM
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Default side wall height? 18x8.5", 19x10"

I am planning on getting some Deep Dish C6 Z06 rims, 18x8.5" up front, 19x10" rear. They are going on my 2002 camaro SS. It has been lowered 1.2" with strano springs. I was just wondering what sidewall height would i need for the tires? Would it look stupid if the rear tires had less sidewall than the fronts? like 35 series in the fronts, 30 in the rear? or if im gunna get 30 in the rear, should i also get 30 in the front? thanks for any input.
Old 11-28-2009, 06:22 PM
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Right now on my TTMs (17") I have 9.5" wheel i am running a 275/40 and on my 10.5" wheel I have a 315/35

Now when I buy my C6 wheels (18") on my 9.5" wheel I am going with a 275/35 and on the 10.5" wheel I am going with either a 295/35 or a 305/35..

Remember you want the wheel to have the same diameter as your OEM tire: 245/50/16 = 25.6"

EDIT: I just read that your rear tires were going to be 19s.. dunno if what I said above applies to you now.. Sorry
Old 11-29-2009, 02:56 AM
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well since my rears are going to be 19s but have a much smaller sidewall than the stock tires, the overall diameter is only going to be slightly bigger, something like .3", if i go with 30 for the sidewall.
Old 11-29-2009, 02:22 PM
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275/30/19 or 285/30/19 on the rear 19x10's and 255/35/18's on the front 18x8.5. 245/40/18's just looks odd on the front size because the sidewall is A LOT bigger than the 30 series on the rear. However, be warned that the ride is horrendous with a 30 series tire...been there, done that, will never do it again and now I'm back on 18's.
Old 11-29-2009, 02:58 PM
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i plan on running the same size rims. I emailed tirerack and they suggested a 245/40R18 for the front and 265/35R19 for the rear.

Ive always asked them for many cars and they've never let me down.

Anyone see a problem with these sizes? Should look good no?
Old 11-29-2009, 03:08 PM
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Ive always been told you want more sidewall on the rear tires than the front if your doing staggered rims, or it will look goofy. Or at least the same sidewall height.
Old 11-29-2009, 03:25 PM
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IMO, if you want staggered wheel heights then the only way it'll look right is if the rear tire sidewall height is > the front side wall height.

For tires these are the only tire sizes I would be looking at:
Fronts, 245 or 255/40/18s.
Rears, 285 or 295/35/19s.

Last edited by 99Bluz28; 11-29-2009 at 04:03 PM.
Old 11-29-2009, 03:51 PM
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Originally Posted by 99Bluz28
IMO, you want staggered wheel heights then the only way it'll look right is if the rear tire sidewall height is > the front side wall height.

For tires these are the only tire sizes I would be looking at:
Fronts, 245 or 255/40/18s.
Rears, 285 or 295/35/19s.
Wouldn't a 285 or 295 just make the overall rear wheel too tall? By over an inch if I did my math right..
Old 11-29-2009, 03:56 PM
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Originally Posted by AdmAnt13
Wouldn't a 285 or 295 just make the overall rear wheel too tall? By over an inch if I did my math right..
Yes I know that; but how else do you make it look right?

I run a staggered tire height set-up on my car(275/35/18s front, 27540/18s rear). What I did is set my tire height 1/2" taller with my programmer.I have no problems running it that way.
Old 11-29-2009, 04:05 PM
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how would the width of the tire make it too tall? 285 or 295 is the measure of the width of the tire, that has nothing to do with how tall the tire is. the sidewall height, the 30 or 35, determines how tall the tire will be. If i got 30 series tires in the rear, the overall diameter of the rim/tire combo would only be about .3" bigger than stock rim/tire combo, since im using a bigger rim, but much slimmer sidewalled tire.
Old 11-29-2009, 04:31 PM
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Originally Posted by WickedSuperSport
how would the width of the tire make it too tall? 285 or 295 is the measure of the width of the tire, that has nothing to do with how tall the tire is. the sidewall height, the 30 or 35, determines how tall the tire will be. If i got 30 series tires in the rear, the overall diameter of the rim/tire combo would only be about .3" bigger than stock rim/tire combo, since im using a bigger rim, but much slimmer sidewalled tire.
Sorry it does, the sidewall height (30 series= 30% of tire width)is determined by multiplying the tire width(295mm)by the sidewall height. Which is a percentage of the tire width.

Example: 295mm x .35 = 103.25mm

295 = tire width
35 = series
103.25mm = sidewall height
Old 11-29-2009, 05:11 PM
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Originally Posted by 99Bluz28
Sorry it does, the sidewall height (30 series= 30% of tire width)is determined by multiplying the tire width(295mm)by the sidewall height. Which is a percentage of the tire width.

Example: 295mm x .35 = 103.25mm

295 = tire width
35 = series
103.25mm = sidewall height

oh damn, didnt know that!
Old 11-29-2009, 05:20 PM
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Originally Posted by 99Bluz28
Sorry it does, the sidewall height (30 series= 30% of tire width)is determined by multiplying the tire width(295mm)by the sidewall height. Which is a percentage of the tire width.

Example: 295mm x .35 = 103.25mm

295 = tire width
35 = series
103.25mm = sidewall height


What he said..
It's just not as easy as it should be..
Old 11-29-2009, 05:28 PM
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Originally Posted by 99Bluz28
Yes I know that; but how else do you make it look right?

I run a staggered tire height set-up on my car(275/35/18s front, 27540/18s rear). What I did is set my tire height 1/2" taller with my programmer.I have no problems running it that way.
To me that would look bad. I don't know for sure though. Guess I'd have to see it. But on my BMW I'm running 255/45/18 on the rear and 235/50/18 on the front and it looks great. It's the same rim size though. I would think a staggered height would be expected that the rears would be smaller because rim is bigger. Shouldn't look weird. What do stock corvettes run as far as sidewall proportions?
Old 11-29-2009, 06:06 PM
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Originally Posted by WickedSuperSport
I am planning on getting some Deep Dish C6 Z06 rims, 18x8.5" up front, 19x10" rear. They are going on my 2002 camaro SS. It has been lowered 1.2" with strano springs. I was just wondering what sidewall height would i need for the tires? Would it look stupid if the rear tires had less sidewall than the fronts? like 35 series in the fronts, 30 in the rear? or if im gunna get 30 in the rear, should i also get 30 in the front? thanks for any input.
For what It's worth the C6 vettes run 18x8.5 and 19x10 as well, and use 245/40/18 and 285/35/19.

To calculate sidewall yourself just:
multiply the percent of aspect ratio by the width then convert to inches.
40% of 245 = 98mm (multiply by .03937 to convert to inches) 3.858"
35% of 385 =99.75mm (multiply by .03937 to convert to inches) 3.927"



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