Backspacing and Offset

megaladon6

megaladon6

Comic Book Super Hero
May 29, 2006
4,054
0
Danbury, CT
stock g-body spacing is 4.75 IIRC
you can use offest or BS and width, but most wheel companies advertise the offset, not the BS.
 
jrm81bu

jrm81bu

Comic Book Super Hero
Jul 9, 2008
3,028
48
Antwerp, OH
megaladon6 said:
stock g-body spacing is 4.75 IIRC
you can use offest or BS and width, but most wheel companies advertise the offset, not the BS.
I think it's 3.75 or maybe 4.

4.75 will most likley put you into the frame.
 
megaladon6

megaladon6

Comic Book Super Hero
May 29, 2006
4,054
0
Danbury, CT
yeah, sorry 3.75, and i think 4 if you count the lip of the rim
 
442Jayp

442Jayp

Master Mechanic
Nov 11, 2010
279
0
Does anyone kno how wide i can get my back tires. i was thinking of going 275 in the rear but i dont want it to rub..can someone let me kno if it will rub
 
bigdan

bigdan

Master Mechanic
Oct 3, 2007
381
0
st-jean baptiste ,quebec,
this a combined problem back spacing & tire buldge ....
cause when a tire buldges pass the rim lip it takes away space between rim and frame ....
at 4.0 b/s with a 275 /50 on a 8 inch rim I doubt it woulndt rub on frame .....specialy in tight curves !
if fits, it will be limit !

the stock 7" rims are at 3.75" b/s .....
 
R

rustyroger

G-Body Guru
Mar 14, 2007
512
18
Margate, UK>
As I understand it the most important thing is to get the centerline of the wheel lined up with the middle of the wheel bearings, very important for the fronts, maybe a little leeway on a solid axle rear.
This is to avoid bump steer conditions and putting an offset load on the bearings.

Roger.
 
8

87PearlRegal

Not-quite-so-new-guy
May 20, 2011
14
0
Dayton, Oh
I am going the stocker route with my Regal, and I want some real meat in the back. I am looking at 15x10's in the back and 15x8's in front. What kind of back spacing should I be lookin for in the back?
 
pontiacgp

pontiacgp

Canadian Prime Minister
Mar 31, 2006
25,151
113
Kitchener, Ontario
rustyroger said:
As I understand it the most important thing is to get the centerline of the wheel lined up with the middle of the wheel bearings, very important for the fronts, maybe a little leeway on a solid axle rear.
This is to avoid bump steer conditions and putting an offset load on the bearings.

Roger.
we run offset rims on our race car and it has no effect on the bearings. As for bump steer a wheel cannot create or improve a bump steer issue. Here's how we measure and correct the bump steer and it's done without the wheel

 
S

steve1987

n00b
Nov 18, 2011
1
0
i am currantly in the wheel department and want to pick up some 15 x 10 champion wheels i have a ford 9 in that was made to be same length as stock rear was wondering if anyone els on here has 10 in rears and could help out with bs and i plan to run a 9 in slick reason for buying 10 in rim is because next wint i plan to mini tub
 
Qdub24

Qdub24

Royal Smart Person
Sep 6, 2006
1,802
113
Columbus, GA
Just a lil something I came across:

 
  • Like
Reactions: Ace Burt

Please support GBodyForum Sponsors

Classic Truck ConsolesDixie Restoration DepotMike's MontesP-S-TSouthside Machine PerformanceUMI Performance

contact[email protected]for info on becoming a sponsor