Author Topic: what is the correct front wheel backspacing on a 1968 with 15" x 7" rally wheels  (Read 1598 times)

malley67

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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

BlackoutSteve

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Did they ever have 15x7" Ralleys?

Anyway 4.25" works well.  ;)
Restoring my RHD 69 Jane in Melbourne, Australia.
http://www.usmuscle.com.au/Forum/showthread.php?t=2840

tom

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Yes, 15 x 7 ralleys were on Z's
http://www.camaros.org/suspen.shtml#Wheels
69 X11 Z21 L14 glide
looking for a 69 export model (KPH) speed
o

x66 714

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Not in 68. 15x6 was the largest wheel on a Camaro including the z/28....Joe
See America's First, Chevrolet

1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968
1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969

vtfb68

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I think the tires are a bit tall for the front. Scrapping the wheelwells or just the trim?
  VT
05C LA RS/SS U2 712 L34 M21 BR
08E LA RS Y2 749 L30 M35
"In the pursuit of accuracy"

malley67

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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

vtfb68

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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
05C LA RS/SS U2 712 L34 M21 BR
08E LA RS Y2 749 L30 M35
"In the pursuit of accuracy"

malley67

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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