Wheel change
Thread Starter
Instructor
Joined: Jan 2016
Posts: 201
Likes: 1
Wheel change
Hi
i have a 1984 c4 with original 16" wheels ,
im thinking of replacing them with factory wheels off
a 1989 C4 (17")
any special concerns like spacers , or are they a direct
replacement
thank
monte k
Anderson, IN
i have a 1984 c4 with original 16" wheels ,
im thinking of replacing them with factory wheels off
a 1989 C4 (17")
any special concerns like spacers , or are they a direct
replacement
thank
monte k
Anderson, IN
Team Owner
Joined: Sep 2003
Posts: 25,383
Likes: 2,736
I believe that most use a 19mm/3/4" adapter type spacer that is hub-centric to the hub and provides a correct diameter to be hub-centric to the newer wheel. Generally speaking there are "dimples/divots" between wheel stud bores so that the length of the OE studs require no trimming. If studs have been changed through the years to longer or maybe those with a "dog point" then maybe a trim is required. Generally the adapter is sold with low height wheel nuts for the spacer/adapter to the car.
Safety Car
Joined: Aug 2013
Posts: 4,427
Likes: 604
From: Minneapolis Mn
I believe your 84 is the same as my 86 AFAIK. If you have 8.5" wide rims, the backspace is +32mm. If they're 9.5" then they're +38mm.
The newer ones are all +56mm so they are not a direct install without using some form of spacer.
If you're open to reproduction rims, there are some that are available that will bolt on without spacers. Just did have with mine, got some 18x9.5" with a +40mm backspacing and they fit just fine without and spacers having 255x40zr18 tires.
The newer ones are all +56mm so they are not a direct install without using some form of spacer.
If you're open to reproduction rims, there are some that are available that will bolt on without spacers. Just did have with mine, got some 18x9.5" with a +40mm backspacing and they fit just fine without and spacers having 255x40zr18 tires.
Instructor
Joined: May 2016
Posts: 138
Likes: 8
From: Jackson Michigan
Here is a compatibility chart one of the other users here was niceenough to share with me that might help.
http://www.mirrockcorvette.com/c4-part-differences.html
The link for the rims and tires takes you here:
http://www.mirrockcorvette.com/corve...de-wheels.html
So you would be going from a 32 or 38mm back spacing to a 56mm back spacing.
http://www.mirrockcorvette.com/c4-part-differences.html
The link for the rims and tires takes you here:
http://www.mirrockcorvette.com/corve...de-wheels.html
So you would be going from a 32 or 38mm back spacing to a 56mm back spacing.
Last edited by Akodo; Mar 28, 2017 at 12:19 PM.
Safety Car
Joined: Aug 2009
Posts: 3,751
Likes: 275
From: Melbourne, Victoria, Australia
I had the 1 inch adapters to suit the 56mm offset 88-96 rims for around 10 years, when I had the chrome come of a rim I got some direct fit 38mm offset rims.
In Australia adapters are frowned upon by police.... hence I changed the wheels first chance I got after risking it for 10 or more years.
corvette central has direct fit wheels or look on ebay .
