Wheel size and back spacing - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JayDubBlazer · 07-21-2003, 10:29 AM

My blazer is 4wd. From what I have learned the wheel size on my truck is 6-139.7 or 6-5.5 pattern. What I am confused about is the numerous wheels that are advertized with these dimisions. How do I make sure that it will fit over my hub lockout? And what back spacing do I need. I really not looking at anything really hard I just would like to know incase a good deal comes my way.

**JIMs70GMC** · 07-21-2003, 10:54 AM

For the most part if the wheel is advertised as a truck wheel it should fit. I had 15x10 w/ 4" backspacing white wagon wheels on an 85 K5. Fit no problem.

JayDubBlazer · 07-24-2003, 01:16 PM

I was wondering if these wheels would fit? If so how much back spacing? The specs are-

WHEEL MATERIAL: Alloy Aluminum
MODEL: Series 301
WHEEL SIZE: 20 x 8.5
FINISH: Super Finish (Polished Machined)
BOLT PATTERN: 6 on 5-1/2"
OFFSET: +14mm
BACKSPACE MEASURMENT: 5-1/4"
HUB HOLE DIAMETER: 108.20mm / 4.26"

They are on ebay at

http://cgi.ebay.com/ebaymotors/ws/e...item=2424791811

Thanks

__________________

**JIMs70GMC** · 07-25-2003, 05:02 AM

That's a lot of back spacing.

GreenMystChevy · 07-25-2003, 01:50 PM

That does sound like a lot of backspace but then again, I am curious as to how much we can get on the 4x4's. I know at least 4" so I was thinking I'd try to go 4 1/2" unless someone tells me otherwise.
BTW: do you happen to know what the bolt patter for the '72 8 lug 3/4 ton axle is?

**JIMs70GMC** · 07-26-2003, 10:20 AM

8 on 6.5"

GreenMystChevy · 07-28-2003, 12:49 PM

thanks

JayDubBlazer · 07-31-2003, 04:00 AM

Has anyone used these? Are they a good way to adjust for back spacing. They offer sizes from 1" to 4"

http://www.truckaddons.com/Catalog/s...ls_adaptit.htm

thanks

07-21-2003, 10:29 AM	#1
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,885	Wheel size and back spacing My blazer is 4wd. From what I have learned the wheel size on my truck is 6-139.7 or 6-5.5 pattern. What I am confused about is the numerous wheels that are advertized with these dimisions. How do I make sure that it will fit over my hub lockout? And what back spacing do I need. I really not looking at anything really hard I just would like to know incase a good deal comes my way. __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

07-21-2003, 10:54 AM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	For the most part if the wheel is advertised as a truck wheel it should fit. I had 15x10 w/ 4" backspacing white wagon wheels on an 85 K5. Fit no problem. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-24-2003, 01:16 PM	#3
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,885	I was wondering if these wheels would fit? If so how much back spacing? The specs are- WHEEL MATERIAL: Alloy Aluminum MODEL: Series 301 WHEEL SIZE: 20 x 8.5 FINISH: Super Finish (Polished Machined) BOLT PATTERN: 6 on 5-1/2" OFFSET: +14mm BACKSPACE MEASURMENT: 5-1/4" HUB HOLE DIAMETER: 108.20mm / 4.26" They are on ebay at http://cgi.ebay.com/ebaymotors/ws/e...item=2424791811 Thanks __________________ __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

07-25-2003, 05:02 AM	#4
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	That's a lot of back spacing. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-25-2003, 01:50 PM	#5
GreenMystChevy Registered User Join Date: Jan 2002 Location: Woodinville, WA Posts: 513	That does sound like a lot of backspace but then again, I am curious as to how much we can get on the 4x4's. I know at least 4" so I was thinking I'd try to go 4 1/2" unless someone tells me otherwise. BTW: do you happen to know what the bolt patter for the '72 8 lug 3/4 ton axle is? __________________ Jeremy '71 C-10 '72 GMC K2500 '72 Nova (Dad's) '70 Chevelle SS '55 Sedan Delivery Attempting to build up this here 4x4...make her real tall and purty...well, maybe just tall

07-26-2003, 10:20 AM	#6
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	8 on 6.5" __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

07-28-2003, 12:49 PM	#7
GreenMystChevy Registered User Join Date: Jan 2002 Location: Woodinville, WA Posts: 513	thanks __________________ Jeremy '71 C-10 '72 GMC K2500 '72 Nova (Dad's) '70 Chevelle SS '55 Sedan Delivery Attempting to build up this here 4x4...make her real tall and purty...well, maybe just tall

07-31-2003, 04:00 AM	#8
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,885	Wheel adapters Has anyone used these? Are they a good way to adjust for back spacing. They offer sizes from 1" to 4" http://www.truckaddons.com/Catalog/s...ls_adaptit.htm thanks __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT



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