18' Wheels / Tires Question... - Forums - Official C3 Vette Registry

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Topic: 18' Wheels / Tires Question...

in Forum: C3 Handling Components

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18' Wheels / Tires Question... (1/2)
12/29/12 7:45am

SteveC
Former Member
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Canada

Vette(s):
1969 427/390 Sport Coupe *Stored since 1984*

Joined: 12/2/2012
Posts: 29

I would like to install 18" American Racing Wheels on my 1969 BB Sports Coupe.

Does anyone know of the following configuration being used on a similar car:

Front: 18"x8" 0 Offset 4.5"BS P245/40/ZR18

Rear: 18"x9" 0 Offset 5.0"BS P275/35ZR18

I assume it will be the width that is the limiting factor as the diameter is not much different than what is there now. Suspect there may be issues with interference with the trailing arms?

Thanks for comments.

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Re: 18' Wheels / Tires Question... (2/2)
1/4/13 9:40am

JMB
Former Member
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Cohasset, MA - USA

Vette(s):
1968 coupe bought in 1999, 2nd owner, 427 custom built, 4 speed (M20), 3:36 posi rear end, Recaro seats, Intro wheels, Nitto tires, Flowmasters, etc. Painted nite race metallic blue.

Joined: 1/5/2004
Posts: 36

I have Intro Pentia billet wheels in my '68. The tires are Nitto NT 555. Upfront I have 245x40x18 (Wheels are 18x8). In the rear I have 275x40x18 (Wheels are 18x9). I have had this settup for over 7 years now and never had any clearance issues. Since the wheels are billet wheels, they are the equivalent of 18x9 in front and 18x10 in the rear. As far as the backspacing, I believe it is 4.5". The wheels were manufactured to fit my car. I hope this helps.

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