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#1 |
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![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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I realize there are over 3 pages of threads for BS, backspacing, and wheel offset. But, for the price of special order wheels, I'd like to feel a little more comfortable with what I need for the rears.
I've got a '68 SWB with the stock 55.5" rearend. I'd like to order a pair of 20x10's for the rear, but need to make sure they'll tuck with no issues. The truck will be a static drop using Nate's coilover kit with 4 link in the back. I'm guessing it will be close to 8" of drop in the rear at ride height. I plan on driving this thing pretty hard in the turns, and will have some tire flex from time to time. It's not important to me to have a wider lip, clearance is my concern. Is 5BS safe, or should I consider 5.25BS to be sure to clear? Thanks in advance for your help! Posted via Mobile Device |
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#2 |
Laid Back
![]() Join Date: Apr 2010
Location: mcloud ok
Posts: 2,658
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
I would say 5" bs..
Posted via Mobile Device
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72 chevy swb Direct dealers for.. Vintage Air, Porterbuilt, Billet Specialties,Budnik wheels ,eddie motorsports, raceline wheels, intro wheels, Dakota Digital, precision, unisteer, Trimparts, and many many more... Laid Back Recreations.. Full restoration shop and full paint and body.. Kyle http://67-72chevytrucks.com/vboard/s...d.php?t=574629 |
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#3 |
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![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
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#4 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Nates truck has the narrower rearend (55.5") with 20x10 with 4.75" BS.
Perfect for a static dropped truck. His is a 4.5/6 drop. Hope this picture helps. Personally,... I wouldn't buy wheels until the suspension is done, so you can measure everything.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#5 | |
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![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Quote:
I hate buying these before the truck is together too, but I've got a deadline and these can take 2 months to receive. Does everyone match the front BS to the front for a consistent lip? Posted via Mobile Device |
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#6 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
For a low static dropped truck,... 5" BS on a 20x8.5 wheel,... isn't enough up front to be able to turn the wheels inside the fenders.
n2billets newest truck is running a Dropmember. He has 20x8.5 (5.25"BS) wheels up front with the Dropmember's already narrow front end and narrowed PB a-arms. The rear wheels are 22x10 (with 5.5" BS) and the narrower rearend to clear the bedsides when layed out.
__________________
Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#7 | |
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![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Quote:
Thanks for the info! Posted via Mobile Device |
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#8 | |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Quote:
The Touring and Mild Dropmembers only narrow the track width .25" per side.
__________________
Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#9 | |
______________
![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Quote:
Posted via Mobile Device Posted via Mobile Device |
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#10 |
______________
![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
I'll be running Wilwood discs in the rear. Nate's suggestion is 5.25BS for the rear.
Narrow control arms aren't available for coilovers. Would 5.25BS in the rear on a 20x10 wheel look like crap with a 20x8.5 with 5BS up front? Posted via Mobile Device Last edited by sighlurr; 06-04-2013 at 04:41 PM. |
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#11 |
Registered User
Join Date: Jul 2012
Location: Rosenberg, Texas
Posts: 3,506
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Wow, it's been nearly a month since you asked your question. I hope you got it sorted out before you ordered your wheels. You probably already know this, but more backspacing = less lip; given the same size wheel width. 8.5"-5" = 3.5" (leaves no room for the wheel center thickness). Assuming the mount pad and wheel center are 2" thick, the lip would be 1.5" wide. 10"-5.25" = 4.75", again assuming 2" thickness, rear lip would be 2.75". Your rear wheel would still have a wider lip.
Now I do not know the thickness of the mount pad and the wheel center, so this will not be an accurate measurement for your wheel lip. If this number is 3" instead, then you'll have a 0.5" lip up front and a 1.75" lip in the rear. Just know that these numbers are only to give you an idea of how it measures between front and back. I hope this helps and good luck!
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-Duane C/10 Club Texas member 1971 Chevy C10 "Brutus" SWB Fleetside 2016 6.0L (L96) 6L90E (driver/project) 1965 Pontiac GTO "Royal Goat" 400/TH400 w/AC (my baby) |
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#12 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
What I want to know is when did they start saying the diameter before the width and why did it change? It was always width then the diameter,forever,till recently.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#13 |
Registered User
Join Date: Sep 2010
Location: Lake Havasu City Arizona
Posts: 863
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Umm..... Gee wizz I remember it as (example) 20.0"x8.5" always but what the hell do I know.
What I want to know is did you do all 44,xxx plus posts personally yourself and on this site? Is that an accurate number? How many is that per day? Is that some kind of record? Sorry to threadjack but inquiring minds want to know? Is it so? Posted via Mobile Device
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#14 |
Formerly- 1972SuperCheyenne
![]() Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
What I think is even more amazing is the fact that Keith (lolife99) has so much knowledge of these trucks stored in his noggin. You sir are an asset to the forum. This is why this forum is so good, lots of people all willing to share what they know to help others continue the tradition that we love. Thanks fellas.
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--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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#15 | |
______________
![]() Join Date: Sep 2006
Location: Danville, CA
Posts: 1,285
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Re: 20x10" -> 5.BS, 5.25BS, or 5.5BS?
Quote:
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