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#1 |
Account Suspended
Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Yet ANOTHER backspace question
Can't believe I can't get this into my head yet. Search results came up inconclusive.
20x8.5" rear wheel. Recommended backspace? Same as front: 5"? [Not bagged, 6" drop in rear] |
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#2 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Yet ANOTHER backspace question
No.
Most 10's require a 5.5" BS. So that equals a 4" BS on a 8.5" wheel mounted on the back. (remember the front track width is wider than the rear track width). Break out a tape and verify this.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#3 |
Account Suspended
Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Re: Yet ANOTHER backspace question
Sooo...if I went 8.5s all the way around, I'd have to get them in two different offsets (front and rear)?
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#4 |
Registered User
Join Date: Feb 2013
Location: Upland, Calif
Posts: 698
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Re: Yet ANOTHER backspace question
Most wheels are cast so you won't have a choice of BS, cast wheels usually come one way, so which wheel are you looking at, and what is it's back space?
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#5 | |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Yet ANOTHER backspace question
Quote:
Or run spacers on the rear. That's why most people run 8's and 10's or 7's and 8's. It help hides the wider front track width of these trucks.
__________________
Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#6 |
Account Suspended
Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Re: Yet ANOTHER backspace question
Gotcha. So I could go 5" BS all the way around and run a 1" spacer on the rear, correct?
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#7 |
Account Suspended
Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Re: Yet ANOTHER backspace question
![]() I found a set of 20x8.5 w/ 4.5" of BS. Will this work for me. 4.5" will pull the wheel 1.2" to the *inside* versus a wheel w/ 5" of B.S., correct? So worst case, I could run a 1/2" spacer up front. |
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#8 | |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Yet ANOTHER backspace question
Quote:
BS is measure on the backside of the wheel. Higher the "backspace number",... the more it will tuck under the fender. 5" backspace wheel will tuck 1/2" more than a 4.5" backspace wheel. (as long as the wheels are the same width).
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#9 |
Account Suspended
Join Date: Apr 2008
Location: Hesperia, Ca
Posts: 1,332
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Re: Yet ANOTHER backspace question
So is 4.5 a no-go on a 5/7 drop then?
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#10 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Yet ANOTHER backspace question
I my opinion you need a 5.25" bs on a 8.5" wheel up front.
Posted via Mobile Device
__________________
Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#11 | |
Slugish
![]() Join Date: Jan 2005
Location: Earlysville, Va.
Posts: 1,024
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Re: Yet ANOTHER backspace question
Quote:
got 9.5 rims on back with 4 in B.S.bout as much as can work ---> close but ok got 8 in rims on front with 5.5 b s -> could have gone with 5 in or possibly 4.5 Im running 17 in rims w/ a 5.5 - 7 drop . hope this helps > think low life is right on the mark |
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#12 |
Registered User
Join Date: Sep 2010
Location: Lake Havasu City Arizona
Posts: 863
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Re: Yet ANOTHER backspace question
.....High Positive Offset____________________________High Negative Offset (aka "reversed") Last edited by wraprail; 06-20-2013 at 06:31 AM. |
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