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I have an 1987 c4 looking to buy some 18" stock wheels from a 2000 c5 1st question is will they fit and if so what is the best size of tires to mount on them?
I have an 1987 c4 looking to buy some 18" stock wheels from a 2000 c5 1st question is will they fit and if so what is the best size of tires to mount on them?
If this is a set of 4 from a single car it's likely that the wheels are "staggered" 17" fronts and 18" rears. It's important to find out exactly what you're looking at before soliciting information. The spacer requirement would likely be different dependent upon what you're anticipating buying. The wheel dimensions will be cast into the wheel back-side and then it would be possible to make maybe a suggestion.
If the wheels were from a single car and 17/18 stagger it's generally assumed that a 1" spacer for the front and 1.25" for the rear but 1" would do.
Sizes - let's see what you're actually looking at.
It depends on which wheel(s).
Yours had either 16"x 8.5"- 32mm or 16"x 9.5"- 38mm
The 2000 C5 base wheel you suggested is 18"x 9.5"- 65mm
So you will need spacers to run a full set of C5 base 18" wheels.
There is an interesting option for 18's though. It looks like the C6 Z06 has a 18"x 9.5"- 40mm front wheel. It looks like a full set of those front wheels should fit without spacers.
That has nothing to do with the question asked as to "what fits"
Sorry perhaps I could have stated it better that it depends on which wheels he wants to use and what size adapter he may need. Either of the stock '87 wheels will need an adapter with the 18" base C5 wheels.
I posted the offsets for the stock '87 wheels because he may want to see the difference between his stock wheels and the proposed wheels. It will show him the amount of offset difference.
Last edited by QCVette; May 7, 2014 at 12:14 PM.
Reason: Explained posting of offsets
thanks for the info decided to cancel the idea of 18's found some 17x 9.5 with a 38 offset from I think a mid 1990's zr1 hope they will fit
The 9.5" on any year ZR-1 is a 56mm - doesn't matter the style - "ALL"! If they're 9.5 and 38mm then they're early wheels for '87 or earlier. They should be cast 38mm if they are. If they're not cast then the back-spacing is very close to 6.7", a straight edge and a tape measure should answer any questions. A 56mm 9.5" wheel the back-spacing" is closer to 7.4".