1980 Chevrolet Trucks K20 Silverado Tires

The 1980 Chevrolet Trucks K20 Silverado uses either 8.75R16.5 or 950-16.5, depending on the sub-model. Standard K20 Silverado applications use the 8.75R16.5 radial size, while Bonus Cab front and rear applications use the 950-16.5 bias-ply size.

The important step is identifying the truck’s exact configuration before choosing a tire, because both sizes use 16.5-inch rims but they are not the same fitment. Confirm the sub-model, stud variation, and actual wheel setup on the truck, especially if it has been modified or has had wheels changed during its life.

The primary tire fitments for the 1980 Chevrolet Trucks K20 Silverado use a 16.5-inch rim diameter. Both the 8.75R16.5 radial fitment and the 950-16.5 bias-ply fitment are built around that same 16.5-inch wheel diameter.

Rim diameter is only part of the fitment picture on this truck. A 16.5-inch wheel does not automatically mean either size is appropriate, so it still matters to confirm whether the truck is a standard Silverado or a Bonus Cab application and then check the wheel width against the tire being considered.

More than one tire size appears on the 1980 Chevrolet Trucks K20 Silverado because fitment changes with the specific sub-model. The standard Silverado applications use 8.75R16.5 radial tires, while Bonus Cab front and rear positions use 950-16.5 bias-ply tires.

That means tire selection starts with the truck’s exact configuration rather than with the model name alone. It is also wise to inspect the truck itself before ordering tires, since older trucks are often changed over time with different wheels, replacement axles, or service-related parts that can affect what is actually on the vehicle now.

950-16.5 is a bias-ply tire size on the 1980 Chevrolet Trucks K20 Silverado. It is used on Bonus Cab front and rear applications, while the standard K20 Silverado sub-models use a different tire size, 8.75R16.5, in radial construction.

That distinction matters because the two constructions are tied to different truck configurations on this model. A buyer looking at 950-16.5 should focus on preserving the Bonus Cab fitment, checking wheel compatibility, and choosing among the available bias-ply truck tires rather than assuming the radial Silverado fitment and the Bonus Cab fitment can be treated the same.

8.75R16.5 is a radial tire size for the 1980 Chevrolet Trucks K20 Silverado. It applies to the standard Silverado sub-models in this fitment range, including both stud-size variations, and it differs from the 950-16.5 bias-ply size used on the Bonus Cab applications.

The practical issue is confirming which truck configuration is actually in front of you before selecting tires. Since both fitments use 16.5-inch rims, the construction difference can be easy to overlook, especially on an older truck that may have had wheel or tire changes, so a careful wheel and sub-model check is worthwhile.

That depends on the exact 1980 Chevrolet Trucks K20 Silverado sub-model. The standard Silverado applications use 8.75R16.5 radial tires, while Bonus Cab front and rear applications use 950-16.5 bias-ply tires, so the first priority is matching the truck’s actual fitment rather than choosing by preference alone.

Once the correct sub-model is confirmed, the choice becomes more practical. A restoration-oriented owner may want to stay with the construction tied to that configuration, while a road-use-focused owner should also check the current wheels, wheel width, and overall setup to make sure the selected tire matches how the truck is presently equipped.

Start with the exact fitment: standard K20 Silverado applications use 8.75R16.5 radial tires, while Bonus Cab front and rear applications use 950-16.5 bias-ply tires. After size and construction are confirmed, the next considerations are wheel compatibility, intended use, and whether the truck is being kept in a more restoration-oriented presentation.

For buyers selecting within the available 950-16.5 products, compare tire series, load capacity, rim-width range, and overall truck-tire character rather than looking only at size. On an older pickup, it also helps to confirm whether the current wheels, hubs, or suspension remain close to original service configuration before settling on a tire.

The available products for the 1980 Chevrolet Trucks K20 Silverado in 950-16.5 come from STA. Within that size, the choices include the Traxion and Super Transport series, both built as blackwall bias-ply truck tires for the Bonus Cab applications that use 950-16.5.

Brand alone should not be the only deciding factor. It is better to begin with the truck’s exact fitment, then compare the series offered in that correct size, along with wheel-width compatibility and the type of use the truck sees, whether that means show presentation, occasional driving, or more utilitarian vintage truck service.

For the 950-16.5 Bonus Cab fitment, the available tire series are STA Traxion and STA Super Transport. Both are bias-ply blackwall truck tires sized for 16.5-inch rims, and both carry a Military & Truck attribute that suits the heavy-duty character of this application.

Choosing between series comes down to the kind of presentation and use you want from the truck, along with wheel-width compatibility and load needs. Since both series share the same nominal size, the buyer’s job is not to change fitment but to decide which tire best matches the truck’s intended look and working style.

A period-style choice starts with the fitment tied to the truck’s exact configuration. Standard K20 Silverado applications use 8.75R16.5 radial tires, while Bonus Cab front and rear applications use 950-16.5 bias-ply tires, so keeping the correct size and construction is the strongest starting point for an authentic-looking setup.

For a Bonus Cab using 950-16.5, the available STA blackwall truck tires keep a traditional heavy-duty appearance that suits the era well. When exact originality matters beyond general period style, it is smart to compare the truck against marque literature, surviving examples, and restoration references before settling on a specific tire series.

Tire construction changes the visual character of a restored 1980 Chevrolet Trucks K20 Silverado because radial and bias-ply truck tires do not present the same way on the vehicle. On this model, that distinction is built into the fitment itself, with 8.75R16.5 radial on standard Silverado applications and 950-16.5 bias-ply on Bonus Cab applications.

A buyer aiming for a restoration-oriented result should match the construction associated with the correct sub-model before thinking about smaller appearance details. That approach keeps the truck’s stance and tire presentation aligned with the way that specific configuration was equipped, without assuming that one construction suits every K20 Silverado variant equally well.

Yes, modifications can affect tire fitment on a 1980 Chevrolet Trucks K20 Silverado even when the tire size appears correct on paper. Changes to wheels, wheel width, hubs, ride height, springs, or steering components can alter how a 16.5-inch tire fits and whether the truck still matches its original sub-model fitment path.

A careful inspection helps prevent mismatches. Check the actual wheel diameter and width on the truck, verify that front and rear setups are consistent with the configuration being used, and make sure there is adequate clearance through steering travel and suspension movement before putting the truck back into regular road service.

Before driving a 1980 Chevrolet Trucks K20 Silverado on new tires, inspect the wheels for correct diameter and condition, confirm the tires match the truck’s exact sub-model fitment, and look over the valve stems, lug hardware, and overall mounting quality. It is also worth checking the wheel width against the tire being installed.

The truck itself deserves attention too. Steering components, suspension wear, brake condition, and alignment can all affect how new tires behave on the road, especially on an older heavy-duty pickup. After installation, keep an eye on air pressure, clearance, and any signs of rubbing or uneven wear during the first miles.

Tires on a collector 1980 Chevrolet Trucks K20 Silverado should be checked regularly for air pressure, sidewall cracking, tread wear, cuts, bulges, and signs of slow air loss. Collector trucks often spend long periods parked, so tire condition can decline with age and storage even when the tread still looks usable.

Good storage habits make a difference. Keep the truck away from prolonged sun, excess heat, moisture, and ozone sources when possible, and inspect the tires before any longer drive rather than assuming a low-use truck is ready to go. Older 16.5-inch wheel setups also deserve periodic review for corrosion, damage, and secure mounting.