Zr1 wheel offset question

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Jun 23, 2020 | 08:35 PM

WICKIDSIX

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Zr1 wheel offset question

So I've searched around and I can't seem to find an exact answer. I'm sure somebody knows where the sticky is. Looking at purchasing ZR1 wheels for my 95 C4. I want the 9.5 up front and the 11 on the rear. What is the correct offser/ backspacing for the rears to not stick out. Thanks in advance for the help.

Jun 24, 2020 | 07:19 AM

vettehardt

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From: New Carlisle IN

Quote:

Originally Posted by WICKIDSIX

To put on a 95, you want the 50mm offset that was on the grand sports in 96. They will still stick out a bit but not much (the reason they put the flares on the grand sports).

The Zr1s had 36mm offset which is what gave them the extra 3" of width.

Jun 24, 2020 | 09:06 AM

vader86

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From: Athens AL

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56mm front, 50mm rear for you.

Jun 24, 2020 | 09:21 AM

WICKIDSIX

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Ok cool, thanks

Jun 24, 2020 | 09:24 AM

WVZR-1

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The correct offsets have been mentioned but I'd think today's 'tire market' might maybe require rethinking! 9.5 X 4 a much better choice I'd think!

Jun 24, 2020 | 09:50 AM

vettehardt

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From: New Carlisle IN

Quote:

Originally Posted by WVZR-1

The correct offsets have been mentioned but I'd think today's 'tire market' might maybe require rethinking! 9.5 X 4 a much better choice I'd think!

Unless you go to an 18X10.5 or 18X11 in the rear. Then there are a ton of choices in 315 or 335 series tires.

Jun 28, 2020 | 09:19 AM

stanleyz

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From: Sharpsburg GA

Quote:

Originally Posted by vader86

56mm front, 50mm rear for you.

How about my 87, Can I get the 9.5 56mm off set front and 11 50 mm off set rear. Both with spacers. 1/2 inch rear spacers. Will they stick out too far?

Jun 30, 2020 | 03:47 PM

MatthewMiller

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From: St. Charles MO

Quote:

Originally Posted by vettehardt

Unless you go to an 18X10.5 or 18X11 in the rear. Then there are a ton of choices in 315 or 335 series tires.

I'm not so sure about that. In 315/30/18 Tire Rack has only two tires that aren't intended for competition use, and they cost $333 and $477 each. There's only one in 335/30/18 size and costs $470, and the minimum rim width spec for it is 11.5". That said, there are tons of choices in 275/35/18, or 285/35, or 295/35. Any of those fit properly on a 10.5" or 11" wheel, and are good diameters for a C4.

Quote:

Originally Posted by stanleyz

How about my 87, Can I get the 9.5 56mm off set front and 11 50 mm off set rear. Both with spacers. 1/2 inch rear spacers. Will they stick out too far?

They may not stick out quite far enough. To be more precise, they may have too much backspacing and rub on the inside. You'll need to experiment with different spacer thicknesses, but it's more likely that you need 3/4". That will give you the exact same wheel location up front as your 87 had when equipped with 16x9.5" wheels from the factory (38mm offset). With 11s, things are tight and so in back you'll have to see how things fit with 1/2", 5/8", and 3/4" spacers.