Wheel offset, really needed?
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 911
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From: Parts Unknown
Wheel offset, really needed?
The wheel packages from the factory are either 18 front - 19 rear, or 19 front - 20 rear. Is there a reason for the offsets? Can I go 19 front - 19 rear?
Burning Brakes
Joined: Jan 2004
Posts: 1,009
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From: slower lower DE
Off set is different from wheel diameter. If you go to 19's in the front, the wheel off set needs to be the same as the factory off set for the front wheels. If not, the tire will extend beyond the fender lip.
Race Director
Joined: Apr 2003
Posts: 19,352
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From: Tampa, Florida
There's a recommended difference in diameter...not sure what it is but I'm sure someone does!!
So the answer is 'yes', you can run 19" on all 4 corners but the tires must be different diameters.
Last edited by jim2527; Apr 15, 2016 at 10:41 AM.
Melting Slicks
Joined: Apr 2015
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Offset is an actual part of wheel measurement, I wouldn't use that term to describe a staggered wheel fittment as you are just going to confuse people.
Like the third poster.
There is not an exact technical reason for the staggered diameter on the C7 that I know of (aside from good looks) but the last poster is correct in that the overall diameter stagger is important to maintain the required ratio for the applicable systems, since the stagger exists from the factory regardless of why it is there in the first place.
Administrator
Joined: Jun 2007
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From: Bel Air (by way of Fort Worth, TX) Maryland
St. Jude Donor '12 thru '21
You mean, "staggered" not "offset".
Offset is an actual part of wheel measurement, I wouldn't use that term to describe a staggered wheel fittment as you are just going to confuse people.
Like the third poster.
There is not an exact technical reason for the staggered diameter on the C7 that I know of (aside from good looks) but the last poster is correct in that the overall diameter stagger is important to maintain the required ratio for the applicable systems, since the stagger exists from the factory regardless of why it is there in the first place.
Offset is an actual part of wheel measurement, I wouldn't use that term to describe a staggered wheel fittment as you are just going to confuse people.
Like the third poster.
There is not an exact technical reason for the staggered diameter on the C7 that I know of (aside from good looks) but the last poster is correct in that the overall diameter stagger is important to maintain the required ratio for the applicable systems, since the stagger exists from the factory regardless of why it is there in the first place.
IIRC, the staggered fitment was more aesthetic than anything technical, but I'm referencing the C5. At this point, it might very well be designed specifically for staggered fitment.
In any case, it would require reprogramming to put the same size wheels on all four corners. Not sure why anyone would want to change the staggered fitment on a C7.
Race Director
Joined: Apr 2003
Posts: 19,352
Likes: 654
From: Tampa, Florida
There is not an exact technical reason for the staggered diameter on the C7 that I know of (aside from good looks) but the last poster is correct in that the overall diameter stagger is important to maintain the required ratio for the applicable systems, since the stagger exists from the factory regardless of why it is there in the first place.
Melting Slicks
Joined: Apr 2015
Posts: 2,353
Likes: 779
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Mister Big The wheel packages from the factory are either 18 front - 19 rear, or 19 front - 20 rear. Is there a reason for the offsets? Can I go 19 front - 19 rear?
Mister Big:
I think this is the info you might be looking for. These offsets are for the Corvette C7 Base model in the 19 x 20" wheels. I also have the ZF1 package on my 2015.
19x8.5 Front +56 offset
20x10 Rear +79 offset
Mister Big:
I think this is the info you might be looking for. These offsets are for the Corvette C7 Base model in the 19 x 20" wheels. I also have the ZF1 package on my 2015.
19x8.5 Front +56 offset
20x10 Rear +79 offset
Last edited by nmvettec7; Apr 15, 2016 at 07:59 PM.