1980 GMC K2500 Sierra Grande Tire Sizes

Factory original equipment (OE) tire specifications.

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(7/16 & 1/2 inch studs)

Tire Size
8.75R16.5LT/C
Load Index
Speed Rating

(9/16 inch studs)

Tire Size
8.75R16.5LT/C
Load Index
Speed Rating

Bonus Cab (7/16 & 1/2 inch studs)

Front
Tire Size
9.50-16.5LT/D
Load Index
Speed Rating

Bonus Cab (7/16 & 1/2 inch studs)

Rear
Tire Size
9.50-16.5LT/E
Load Index
Speed Rating

Bonus Cab (9/16 inch studs)

Front
Tire Size
9.50-16.5LT/D
Load Index
Speed Rating

Bonus Cab (9/16 inch studs)

Rear
Tire Size
9.50-16.5LT/E
Load Index
Speed Rating