backspacing question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 08-22-2007, 10:38 PM

I have truck ralleys on now what was the standard back spacing on these rims. Going to look at some used rims and want to know what back spacing I can get away with.

Thanks

70c10 · 08-23-2007, 07:01 AM

Alex, do you have 5 lug or 6 lug?. Disk or drum on the front?. I "think" the rally wheels have 4" backspace. If you have drums and 15" rims it's easier to go with more backspace for the front. I just converted to disc (6 lug) and have 4" bs and it just barely clears the rotors. If I would go to a bigger rim than I would have more options. Hope this helps! What size rims you thinking of going with?. I know somebody who has a set of polished Centerlines similar to mine but 17" thinking of selling cheap to fund a Big block project.

76bonanza · 08-23-2007, 08:09 AM

Well I really am looking for something same size only billit or chrome I have 6 lug drums I don't plan on changing for now. I was thinking around 4 inch BS.

Blazer1970 · 08-23-2007, 05:24 PM

I am pretty sure that the 6 lug truck rallies are an 8 inch wheel with about 3 1/2" backspacing.

08-22-2007, 10:38 PM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	backspacing question I have truck ralleys on now what was the standard back spacing on these rims. Going to look at some used rims and want to know what back spacing I can get away with. Thanks __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

08-23-2007, 07:01 AM	#2
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Re: backspacing question Alex, do you have 5 lug or 6 lug?. Disk or drum on the front?. I "think" the rally wheels have 4" backspace. If you have drums and 15" rims it's easier to go with more backspace for the front. I just converted to disc (6 lug) and have 4" bs and it just barely clears the rotors. If I would go to a bigger rim than I would have more options. Hope this helps! What size rims you thinking of going with?. I know somebody who has a set of polished Centerlines similar to mine but 17" thinking of selling cheap to fund a Big block project. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads Last edited by 70c10; 08-23-2007 at 07:12 AM.

08-23-2007, 08:09 AM	#3
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: backspacing question Well I really am looking for something same size only billit or chrome I have 6 lug drums I don't plan on changing for now. I was thinking around 4 inch BS. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

08-23-2007, 05:24 PM	#4
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: backspacing question I am pretty sure that the 6 lug truck rallies are an 8 inch wheel with about 3 1/2" backspacing. __________________ Tim



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