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08-24-2007, 10:33 PM
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#1 |
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Registered User
Join Date: Mar 2002
Location: woodstock, alabama, usa
Posts: 938
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original tire size?
Does anyone know what the original tire size for a 71 half ton was?
and what does that translate into in the newer sizes. i would like to know that my speedo is correct. in other words what size tires do i need to buy? Thanks, Tony
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i survived cancer and kidney stones, but my kids are killing me. |
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08-24-2007, 10:35 PM
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#2 |
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Registered User
 
Join Date: Feb 2004
Location: Idaho
Posts: 4,033
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Re: original tire size?
It depends on what is listed in the glove box SPID, some trucks came with 16.5 in rims and others came with 15" rims. I know that others will chime in with more info than what I have provided.
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"Remember, They can Kill You, but they can't eat You, That's against the law!!!!!!!!!" |
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08-24-2007, 11:13 PM
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#3 |
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Registered User
Join Date: May 2007
Location: dallas ga
Posts: 1,505
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Re: original tire size?
99% sure it was a 15".
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08-25-2007, 01:36 AM
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#4 |
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Senior Member
Join Date: Mar 2007
Location: VANCOUVER ISLAND, B.C., Canada
Posts: 1,602
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Re: original tire size?
I think he is wanting to know the factory tire size. I would like to know this as well.
esll. 
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Tomorrow is for doing today's stuff.  ************************************* This truck has just the right amount of energy for me! Author: Warren Lake .... (member) |
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08-25-2007, 02:54 AM
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#5 |
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Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: original tire size?
if im guessing right its about a 28in tall tire which is i think is about a 235/75r15
ive got 31/10.5r15 and my speedo reads 5mph under
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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08-25-2007, 04:48 AM
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#6 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: original tire size?
about the most common factory tire size on halftons was H78X15
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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08-25-2007, 07:16 AM
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#7 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,238
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Re: original tire size?
235/75r15 is the closeesrt you'll get to stock
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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08-25-2007, 10:40 AM
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#8 |
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Old Skool Club
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: original tire size?
8.25-15
This is the old school sizing. I believe the equivalent is the G78-15. I have the old school tire on the only remaining stock wheel from my truck. I have no idea how old it is, but it's still holding air. Don't know how old the air is, either. Maybe I need to refresh it.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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08-25-2007, 10:54 AM
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#9 |
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Retired Air Force 87-09
Join Date: Feb 2007
Location: Bonaire, Georgia 31005
Posts: 284
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Re: original tire size?
According to the resto guide I received from Chevrolet, it is based on GVW.
4400 lbs was a G78-15 bias ply tire. 5400 lbs was a H78-15 bias ply tire or a 6.50-16 bias ply tire. Any tire shop should have a tire book to convert the old tire sizes to the metric tire sizes. Hope this helps. Rich |
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08-27-2007, 01:49 AM
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#10 |
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Registered User
Join Date: Jan 2007
Location: San Jose, California
Posts: 194
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Re: original tire size?
I've got the original sales brochure for my 1972 which I assume would be similar to a 1971. According to the sales information, depending on whether it's 2wd or 4wd, there were 6 tire sizes listed as either standard or optional for the 1/2 ton. The standard tire listed for 2wd 4600 - 5400 GVW and 4wd 5200 - 5600 GVW was a G78-15; the largest optional tire (4wd only) was a 10:00-16.5. There were 4 other optional tires listed as well.
Remember, this was one year newer truck. |
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08-27-2007, 02:55 AM
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#11 | |
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Registered User
Join Date: Aug 2006
Location: Bakersfield,CA
Posts: 7,893
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Re: original tire size?
Quote:
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-steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME |
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08-27-2007, 08:48 PM
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#12 |
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Registered User
Join Date: Oct 2005
Location: Florence, AL (NW Alabama)
Posts: 307
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Re: original tire size?
My '72 has G78-15 on the spare. I was looking on Coker Tire last night and they had a graph on there on bias tire size and radials. So G78-15= 225/70-15 and H78-15= 235/70-15. I'm running 235/75-15 on mine for now.
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1990 Chevy Silverado (My DD) 1978 Chevy Bonanza LWB (My LWB to SWB 1 day project) 2015 Hyundai Sonata (Wife's DD) |
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