CRG Discussion Forum

Camaro Research Group Discussion => Originality => Topic started by: malley67 on February 21, 2011, 03:09:59 AM

Title: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: malley67 on February 21, 2011, 03:09:59 AM
hi guys,
hope you can help me.
i have a 1968 camaro with 15" x 7" rally wheels and firestone firehawke tyres p215/65r15.
i have been told these wheels and tyres should be fine, but when i hit a dip in the road my front tyres rub / scrape against the wheel arch trim.
i am wondering if the back spacing is incorrect and would like to know what it should be ?
any help would be appreciated.
thanks guys,
rohan
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: BlackoutSteve on February 21, 2011, 06:43:23 AM
Did they ever have 15x7" Ralleys?

Anyway 4.25" works well.  ;)
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: tom on February 21, 2011, 11:47:47 AM
Yes, 15 x 7 ralleys were on Z's
http://www.camaros.org/suspen.shtml#Wheels
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: x66 714 on February 21, 2011, 01:16:02 PM
Not in 68. 15x6 was the largest wheel on a Camaro including the z/28....Joe
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: vtfb68 on February 21, 2011, 04:21:39 PM
I think the tires are a bit tall for the front. Scrapping the wheelwells or just the trim?
  VT
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: malley67 on February 22, 2011, 01:34:05 AM
hi vt,
thanks to all who have replied.
the tyre definately scrapes the wheel trim, as it gets bent out after i drive it. not sure if it scrubs the wheel well.
also, should there be a gap between the trim ring and the centre on the wheel ?
my wheels have a gap of about 20mm between the trim ring and the the centre of the wheel ?
thanks guys,
rohan
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: vtfb68 on February 22, 2011, 01:58:51 AM
Rohan,
I used factory 15 x 7 rallys, 215 60 15 BFG T/A's for years with lower springs and never had a problem. I also mounted 215 65 15 Firestones that were very tall and square that rubbed on every driveway and dip. That gap seems very wide, Make sure the rings are correct. Are they bottoming out? Also check the clip location.
  VT
Title: Re: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels
Post by: malley67 on February 22, 2011, 03:05:58 AM
vt,
thanks very much,
trim rings arnt bottoming out.
how do i check / what is the correct clip location ?
so the trim ring should butt up against the centre of the wheel ?
cheers,
rohan