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09-10-2020, 10:13 AM
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#1 |
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Registered User
Join Date: Feb 2013
Location: Cottonwood, Arizona
Posts: 1,382
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Tire size question
I have an 84 GMC Sierra 2500, and the door placard says the stock size tire is a 235/85R16. When I go on some tire shop sites, the only size that pops up is a 215/75R16. Were these an optional tire for the base 3/4 ton pickups? Mine is heavy duty. Would I be able to run the little smaller height tires on mine without any issues, since its a daily driver, not hauling anything? My wheels are stock 16" steel
Thanks |
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09-10-2020, 11:10 AM
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#2 |
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Registered User
Join Date: May 2015
Location: Montana
Posts: 3,696
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Re: Tire size question
You need an "LT" tire, probably E range.
The 215 is probably a passenger car tire. I don't think they even make that size in LT ??? Standard sizes for a pickup like that would be the LT235/85R16 and LT245/75R16. Both of my older pickups have the latter.
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Current/past Chevy/GMC trucks: 1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner |
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09-10-2020, 11:18 AM
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#3 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,249
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Re: Tire size question
Most of the tire store systems are a bit off. I believe if you take the bias ply of the day and convert it to metric it will come up to that size. As mentioned most folks use the 235/75, 235/85, 245/75 as the tire for the 3/4 toner trucks
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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09-10-2020, 11:23 AM
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#4 |
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Senior Member
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,886
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Re: Tire size question
Tirerack.com says it came from the factory with either 215/85/16 or 235/85/16 both LT load range D. Check the diameter of each because you probably will have to change your speedo/odometer gear.
https://www.tirerack.com/tires/Selec...4&autoModClar=
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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09-10-2020, 11:48 AM
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#5 |
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Registered User
Join Date: Oct 2013
Location: Maine
Posts: 2,376
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Re: Tire size question
You will have to call in person because their computers are not accurate. I doubt they will ever discontinue the 235/85R16 load range E tires. That's what a 2500 should have anyway.
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76 Chevy K20 76 GMC K15 77 Chevy C10 77 Chevy K10 |
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09-10-2020, 01:11 PM
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#6 |
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Registered User
Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,052
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Re: Tire size question
The standard tire size for a C20/2500 was LT215/85R16C 6ply rating or LT235/85R16D (front) LT235/85R16E (rear)
https://www.gmheritagecenter.com/doc...olet-Truck.pdf
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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09-10-2020, 06:03 PM
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#7 |
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Registered User
Join Date: Feb 2013
Location: Cottonwood, Arizona
Posts: 1,382
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Re: Tire size question
Thanks everyone. I'll just stay with the 235/85R16 size.
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