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11-08-2015, 03:16 AM
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#1 |
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Registered User
Join Date: Aug 2013
Location: Calgary Alberta
Posts: 273
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Original tires?
Does anyone have information on what kind of tires originally came on a 1975 C20? Brand, size, etc.
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11-08-2015, 03:17 AM
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#2 |
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Registered User
Join Date: Aug 2013
Location: Calgary Alberta
Posts: 273
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Re: Original tires?
Truck has original 16" rims I should mention
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11-08-2015, 03:53 AM
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#3 |
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Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: Original tires?
Keith Seymore will know better then anyone else.
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11-08-2015, 11:19 AM
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#4 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,400
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Re: Original tires?
7.50 x 16. Everybody switched to 235/85r16 radials shortly afterward
__________________
76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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11-08-2015, 11:42 AM
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#5 | |
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Registered User
Join Date: Jan 2009
Location: Calgary, AB
Posts: 1,181
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Re: Original tires?
Quote:
If a C came with 16.5 I would say that was an option. Is your SPID intact? That will tell you your tire size. |
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11-08-2015, 02:27 PM
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#6 |
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Senior Member
 
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,998
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Re: Original tires?
C20s and K20s could all be had with 16.5, it was stock for both. 16s were an option for a long time. Then 16s became stock at some point, don't know year, but I believe it was after 75. 15s were standard on C/K10 only - never on 3/4 ton trucks. 15s had 5 (71 and up C10) or 6 lug pattern (all K5/10).
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11-08-2015, 08:13 PM
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#7 |
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Senior Member
Join Date: Apr 2012
Location: Otway OH
Posts: 788
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Re: Original tires?
According to the GM Heritage Center the standard tire was 8.75-16.5 with 9.50-16.5, 10.00-16.5 (not available on Stepsides) and 7.50-16's available as optional equipment.
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11-09-2015, 10:30 AM
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#8 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,292
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Re: Original tires?
Brands were the usual suspects: Goodyear, Firestone, Uniroyal. Whatever was cheapest at the moment.
Tires are usually high on the list for cost reduction, because whatever savings you can net per tire you can multiply by 5 (usually, or 4 with no spare tire)*. K * or 6 or 7 for dual wheeled vehicles.
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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11-14-2015, 09:25 PM
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#9 |
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Registered User
Join Date: Jun 2011
Location: St Robert, Mo
Posts: 730
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Re: Original tires?
On a 1/74 C20 truck I bought today, it came with 7.50 / 16 C tube hwy tread tires...
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