Wheel size question - mixed sizes on a C4
Thread Starter
Safety Car
Joined: Sep 2006
Posts: 4,129
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From: Pasadena CA
Wheel size question - mixed sizes on a C4
Does anyone ride with 18"s on the rear and 17"s on the front?
Was this the ZR1 spec with its mag wheels?
Does it work for C4?
and lastly will having 18/35 tires mess up the speedo - rather than 17/40 (does the speedo run off the transmission?)
I have a good reason for asking
-Eaks
Was this the ZR1 spec with its mag wheels?
Does it work for C4?
and lastly will having 18/35 tires mess up the speedo - rather than 17/40 (does the speedo run off the transmission?)
I have a good reason for asking
-Eaks
Drifting
Joined: Feb 2003
Posts: 1,978
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From: San Antonio Texas
I've had this set up for years on my '86... 9.5x17 and 10.5x18 with 275/40/17 fronts and 295/35/18 rears. If the heigth of two tires is the same, or very close, they will read the same with your speedo. Won't alter your "over-all" gear ratio either. ZR1 had 9.5x17 and 11x17.
Last edited by Curveit; Apr 4, 2007 at 11:54 PM.
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I've had this set up for years on my '86... 9.5x17 and 10.5x18 with 275/40/17 fronts and 295/35/18 rears. If the heigth of two tires is the same, or very close, they will read the same with your speedo. Won't alter your "over-all" gear ratio either. ZR1 had 9.5x17 and 11x17.
And that's the exact same wheel and tire size combo I'm running.
Racer
Joined: Aug 2006
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From: Albany Oregon
I've had this set up for years on my '86... 9.5x17 and 10.5x18 with 275/40/17 fronts and 295/35/18 rears. If the heigth of two tires is the same, or very close, they will read the same with your speedo. Won't alter your "over-all" gear ratio either. ZR1 had 9.5x17 and 11x17.
Front 275/40/17 = 25.66"
Rear 295/35/18 = 26.1299"
Team Owner
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From: Phila., PA burbs
Thread Starter
Safety Car
Joined: Sep 2006
Posts: 4,129
Likes: 1
From: Pasadena CA
Thanks for the info, and the tire size thingamy
I haven't seen this type of combo except on C5 and C6's and the other day I found some really nice GM mag wheels - they look like the classic A-line for Corvette - but were 17 front and 18 rear which I thought was unusual. I know widths changed a lot on the C4 over the years but diameter..?
Trying to decide between buying these or sorting my car audio.
What's more important - what my car looks like or my experience inside it...hmmm
I haven't seen this type of combo except on C5 and C6's and the other day I found some really nice GM mag wheels - they look like the classic A-line for Corvette - but were 17 front and 18 rear which I thought was unusual. I know widths changed a lot on the C4 over the years but diameter..?
Trying to decide between buying these or sorting my car audio.
What's more important - what my car looks like or my experience inside it...hmmm
Race Director
Joined: Dec 2002
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
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