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Old Jan 28, 2008 | 12:31 PM
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Default Wheel Size Question - Opinions needed...

I'm currently thinking about doing a 19/20 wheel upgrade to my 02 Vert.

First off the car is stock with the exception of headers, GHL Bullets and 3:73 rear.

Front tires will be 275/30 19 and rears will be 305/25 20.

Is there anything I should be aware of with this setup?

I'm looking for opinion's of all the Corvette Guru's here on the forum.

I love the wheels and just want to make sure I'm not going to be introducing any ill effects with this up grade.
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Old Jan 28, 2008 | 12:56 PM
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Hi Wayne,
that should work just fine. I am running 19x35s in the front and have very slight rubbing when turning. People with 30s do not have any issues at all. That little bit makes all the difference.
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Old Jan 28, 2008 | 12:57 PM
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Originally Posted by MR.WaynesWorld
I'm currently thinking about doing a 19/20 wheel upgrade to my 02 Vert.

First off the car is stock with the exception of headers, GHL Bullets and 3:73 rear.

Front tires will be 275/30 19 and rears will be 305/25 20.

Is there anything I should be aware of with this setup?

I'm looking for opinion's of all the Corvette Guru's here on the forum.

I love the wheels and just want to make sure I'm not going to be introducing any ill effects with this up grade.

Sounds like you are on the right track. However, I think you MIGHT have to reprogram your PCM to adjust for the different size wheels so that you don't have any TC/AH problems crop up.
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Old Jan 28, 2008 | 01:04 PM
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Originally Posted by Cozmo
Hi Wayne,
that should work just fine. I am running 19x35s in the front and have very slight rubbing when turning. People with 30s do not have any issues at all. That little bit makes all the difference.

Hi Larry.... Thanks for the input... Getting ready to pull the trigger on these maybe tonight. They are CCW's 505A's and look great....
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Old Jan 28, 2008 | 01:06 PM
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Originally Posted by Chemdawg99
Sounds like you are on the right track. However, I think you MIGHT have to reprogram your PCM to adjust for the different size wheels so that you don't have any TC/AH problems crop up.
Thanks Robert.... I'll just have to give Doug a call at ECS and have him do it... Of course that's when all this dang snow disappears.....
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Old Jan 28, 2008 | 01:10 PM
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Originally Posted by Chemdawg99
Sounds like you are on the right track. However, I think you MIGHT have to reprogram your PCM to adjust for the different size wheels so that you don't have any TC/AH problems crop up.
I believe the speed sensor is in the diff so i dont think there are any recalibrations needed.

Im sure those things are going to look sweet Wayne
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Old Jan 28, 2008 | 01:16 PM
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Originally Posted by Corvette-Chris
I believe the speed sensor is in the diff so i dont think there are any recalibrations needed.

Im sure those things are going to look sweet Wayne


BTW, I believe the speed sensors are in the wheels (I had to have one that went bad replaced) Whenever you change wheel sizes or tire heights over 2" a reprogram is called for
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Old Jan 28, 2008 | 01:17 PM
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Originally Posted by Chemdawg99


BTW, I believe the speed sensors are in the wheels (I had to have one that went bad replaced) Whenever you change wheel sizes or tire heights over 2" a reprogram is called for
I beg to differ but if Im wrong ill own up to it

EDIT: Im thinking of gear changes. Sorry for the confusion haha
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Old Jan 28, 2008 | 01:20 PM
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Originally Posted by Chemdawg99


BTW, I believe the speed sensors are in the wheels (I had to have one that went bad replaced) Whenever you change wheel sizes or tire heights over 2" a reprogram is called for
So if the new 20 wheel/tire combo is close, under 2", to the orginal wheel/tire combo I won't need to re-program PCM?
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Old Jan 28, 2008 | 01:23 PM
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Im running 305/25/ZR20 and 275/30/ZR19.......i have no scraping and did not have to recalibrate anything when i went to the new wheels.
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Old Jan 28, 2008 | 01:26 PM
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Originally Posted by Chemdawg99
Sounds like you are on the right track. However, I think you MIGHT have to reprogram your PCM to adjust for the different size wheels so that you don't have any TC/AH problems crop up.
No need for any of that.

Your car will never know the difference.

The sizes you mention are basically the same (very close) diamaters as OEM Z06 wheels and tires.

The diamater of the bigger wheels with the much lower profile tires you are using even things out.

Check it out here with this nice Tire Size Calculator <=== CLICK HERE
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Old Jan 28, 2008 | 01:27 PM
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Originally Posted by MR.WaynesWorld
So if the new 20 wheel/tire combo is close, under 2", to the orginal wheel/tire combo I won't need to re-program PCM?
That is correct. Which is why I said MIGHT in my last post. the 20" in the rear is pushing the envelope a little and while you might not NEED the programming (you can get away with not doing it) it is prudent that you do it
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Old Jan 28, 2008 | 01:29 PM
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There ARE wheel speed sensors at each wheel needed for the Active Handling.
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Old Jan 28, 2008 | 02:01 PM
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I have had the same setup on my car for over 2 years and noticed no issues.

my only suggestion is that if you run a big brake kit on the rear, make sure that the wheel fits over the brake caliper.
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Old Jan 28, 2008 | 02:03 PM
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Wayne, I purchased those CCWs they are sweet you got to find another set Not pull the trigger you will love the nicer look of CCWs
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Old Jan 28, 2008 | 02:04 PM
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Wayne you DON'T need PCM reprogrammed for wheel change.
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Old Jan 28, 2008 | 02:23 PM
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Originally Posted by FactoryRaceCar
Wayne you DON'T need PCM reprogrammed for wheel change.
Cool good info to know. Thanks Nomi....
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Old Jan 28, 2008 | 02:24 PM
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Originally Posted by EVIL_C5
I have had the same setup on my car for over 2 years and noticed no issues.

my only suggestion is that if you run a big brake kit on the rear, make sure that the wheel fits over the brake caliper.

Thanks Brian.... I doubt I'd be switching to a bigger braking system in the near future...
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Old Jan 28, 2008 | 02:25 PM
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Originally Posted by peter pan
Wayne, I purchased those CCWs they are sweet you got to find another set Not pull the trigger you will love the nicer look of CCWs

Thanks Steve... Just getting some re-assurance from all of my Corvette friends on the wheel upgrade.
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Old Jan 28, 2008 | 03:11 PM
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I assume these are the wheels you're lookin at Wayne ....http://forums.corvetteforum.com/show...&highlight=ccw

Nice choice! ...They'll look great on your Mag Red vert! ... You know you'll have to lower it now! ...
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