Wheels
11-19-2016, 10:19 PM
#2
Race Director
11-20-2016, 12:04 AM
#3
7th Gear
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Ok. Thanks. I have 17x9.5 with a backspace 7.45 on it now. The 17x11 I want has 7.97. That's a .52 difference. By theory if I used a 1/2" or a 1" spacer they should fit right?
11-20-2016, 08:21 AM
#4
Your 7.45 on a 9.5 is a 56, your 7.97 on an 11 is 50. It's generally thought that a ZR-1 36mm offset(7.42 BS) will fit '87 and earlier cars but it's certainly a "car to car" possibility. There can be issues with bolt heads, liners etc.
You have a wheel there now that you say fits BUT really doesn't when "fitment" into the wheel-house etc is considered. A 19mm(3/4) is generally the accepted to use with a 56mm 9.5 on an early car. Some use 1", both are available in the adapter style.
To get your 50mm to fit an early car you'll need a "pass-through" which isn't an issue but you need to determine a specific requirement for your car. A 14mm "pass-through" is I believe possible maintaining hub-centric features to both the hub and the newer wheel. Less than 14mm I don't believe can be done and maintain the features required for hub-centric fitment. 14mm might actually be a stretch
I use 16mm pass-through with longer studs and I have maintained the hub-centric features, Z51Jeff has the same pass-through but maybe a different dimension.
Find real OE 11" 36mm ZR-1 wheels to use as the confirmation before buying or considering spacers of any type.
Where are you located?
Last edited by WVZR-1; 11-20-2016 at 08:23 AM.
11-20-2016, 10:53 PM
#5
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Thanks for the info. I'll have to do some research on my rims I have on now. They are ZR1 style that were purchased around 13 years ago. I know they are 17x9.5. I'll have to figure out the exact backspacing. I have 275/40's on all four corners and they fit perfect without any spacers. There's about a half inch of space in the rear.