1980 GMC C3500 Sierra Grande Tire Sizes
Factory original equipment (OE) tire specifications.
(7/16 & 1/2 inch studs)
FrontTire Size
9.50-16.5LT/D
Load Index
Speed Rating
(7/16 & 1/2 inch studs)
RearTire Size
9.50-16.5LT/E
Load Index
Speed Rating
(9/16 inch studs)
FrontTire Size
9.50-16.5LT/D
Load Index
Speed Rating
(9/16 inch studs)
RearTire Size
9.50-16.5LT/E
Load Index
Speed Rating
(DRW)(7/16 & 1/2 inch studs)
Tire Size
8.75-16.5LT/C
Load Index
Speed Rating
(DRW)(7/16 & 1/2 inch studs)
Tire Size
7.50-16LT/E
Load Index
Speed Rating
(DRW)(9/16 inch studs)
Tire Size
8.75-16.5LT/C
Load Index
Speed Rating
(DRW)(9/16 inch studs)
Tire Size
7.50-16LT/E
Load Index
Speed Rating
Bonus Cab (DRW)(7/16 & 1/2 inch studs)
Tire Size
9.50-16.5LT/E
Load Index
Speed Rating
Bonus Cab (DRW)(9/16 inch studs)
Tire Size
9.50-16.5LT/E
Load Index
Speed Rating