1980 Chevrolet Trucks K20 Cheyenne Tires

The 1980 Chevrolet Trucks K20 Cheyenne uses two different primary tire sizes depending on the exact sub-model. Standard K20 Cheyenne applications use 8.75R16.5 in radial construction, while Bonus Cab front and rear applications use 950-16.5 in bias-ply construction.

That means the first step is identifying the exact truck configuration before choosing a tire. Even though both sizes use a 16.5-inch rim, the size and construction are not the same, so a buyer should verify the sub-model, wheel setup, and whether the truck still carries its original-style wheels before selecting replacement tires.

The tire fitments covered for the 1980 Chevrolet Trucks K20 Cheyenne use a 16.5-inch rim diameter. That applies to both the 8.75R16.5 radial size and the 950-16.5 bias-ply size used across the covered sub-models.

Rim diameter is only one part of fitment, so it should not be treated as the only measurement that matters. Wheel width, actual wheel type, and any changes made over the years can still affect compatibility, especially on older trucks that may have seen wheel swaps, hub changes, or heavy-duty service modifications.

More than one tire size appears because the covered K20 Cheyenne configurations are not all equipped the same way. The standard K20 Cheyenne uses the 8.75R16.5 radial size, while the Bonus Cab front and rear applications use the 950-16.5 bias-ply size.

This is why identifying the exact sub-model matters more than choosing by year and model name alone. A truck that has been repaired, restored, or modified may no longer match its original wheel or tire setup, so checking the truck itself is just as important as knowing which configuration it began with.

For the 1980 Chevrolet Trucks K20 Cheyenne Bonus Cab applications covered here, 950-16.5 is a bias-ply tire size. It is used on the Bonus Cab front and rear fitments, while the standard K20 Cheyenne applications use the separate 8.75R16.5 radial size.

That distinction matters because construction affects both selection and presentation. Anyone replacing 950-16.5 tires should make sure the truck is actually the Bonus Cab configuration in question, then confirm wheel condition and compatibility before ordering, rather than assuming the radial and bias-ply setups can be mixed freely.

The answer depends on which K20 Cheyenne configuration is being fitted. Standard applications here use an 8.75R16.5 radial, while Bonus Cab front and rear fitments use a 950-16.5 bias-ply, so the starting point is the truck’s actual sub-model rather than personal preference alone.

Once the correct fitment is confirmed, the choice becomes more practical. A restoration-minded owner may want to stay with the construction tied to that configuration, while a work-oriented owner may focus on wheel compatibility and intended use. Mixing construction types or changing setups without checking the full wheel and axle arrangement can create unnecessary fitment problems.

A conversion should begin with the exact sub-model and wheel setup, because this K20 Cheyenne does not use one universal tire specification across all versions. The standard truck already uses a radial fitment, while the Bonus Cab applications shown here use the 950-16.5 bias-ply size.

Any change in construction should include a close look at wheel diameter, wheel width, clearance, and the overall condition of the truck’s suspension and steering components. On an older heavy-duty pickup, years of repairs or upgrades can change the setup, so the truck should be measured and inspected rather than converted by size name alone.

For a 1980 Chevrolet Trucks K20 Cheyenne using 950-16.5, the main considerations are correct sub-model fitment, bias-ply construction, and 16.5-inch wheel compatibility. The available options in this size are truck-oriented STA blackwall tires, with Traxion and Super Transport series choices sharing the same 2780@60 psi maximum load figure.

Selection usually comes down to the kind of period truck appearance and tread character you want within the proper size. Rim width also matters, since these 950-16.5 products are built around a 6.50 to 6.75 inch wheel range, so checking the actual wheel on the truck is an important step before making a final choice.

The available product choices shown for the 1980 Chevrolet Trucks K20 Cheyenne in 950-16.5 come from STA. Within that size, the brand is offered in more than one tire series, including Traxion and Super Transport, both in bias-ply construction and blackwall form.

Brand alone should not make the decision. It is smarter to start with the exact size the truck uses, then compare the series, intended truck-style presentation, rim-width specification, and whether the tire suits the vehicle’s restoration goals or working role. The right choice depends on configuration first and brand second.

For the 950-16.5 fitment used on Bonus Cab applications, the available tire series are STA Traxion and STA Super Transport. Both are bias-ply blackwall truck tires built for 16.5-inch rims and both carry the Military & Truck tire attribute.

Comparing tire series is useful when the size and construction are already settled. A buyer can look at how each series fits the truck’s intended role, whether the goal is a more traditional heavy-duty truck appearance or a particular tread style, while still staying within the proper 950-16.5 fitment and rim-width range.

A period-style choice starts with using the tire size and construction that match the truck’s actual sub-model. On this page, the standard K20 Cheyenne uses 8.75R16.5 in radial form, while Bonus Cab front and rear applications use 950-16.5 in bias-ply form.

That means appearance and authenticity should be considered after fitment is settled, not before. For a Bonus Cab truck, the available 950-16.5 blackwall bias-ply options maintain a traditional heavy-duty look. If exact originality matters, the final decision should be checked against build documentation, period photos, or marque-specific restoration references.

Tire construction can change the visual character of a restored truck even when the wheel diameter stays the same. On the 1980 Chevrolet Trucks K20 Cheyenne, the difference between an 8.75R16.5 radial and a 950-16.5 bias-ply fitment is not only technical, but also part of how the truck presents itself.

A bias-ply truck tire generally supports a more traditional heavy-duty look, especially in blackwall form, while a radial fitment reflects the later-era move toward modernized truck road manners. Restoration-minded owners usually get the best result by matching the construction to the correct configuration before comparing tread style or brand.

Yes, modifications can change tire fitment on a 1980 Chevrolet Trucks K20 Cheyenne even when the tire size seems correct on paper. Aftermarket wheels, suspension changes, axle swaps, brake conversions, or body alterations can affect how a 16.5-inch tire sits and clears the truck.

A truck that has been lifted, lowered, rebuilt, or converted for different work may no longer match its original tire setup. That is why wheel diameter, wheel width, steering clearance, and fender clearance should all be checked on the actual truck before mounting replacement tires, especially when changing between sub-model-specific fitments.

Before road use, inspect the wheels for damage or corrosion, confirm the tire size matches the truck’s exact sub-model, and check that the beads seat properly on the 16.5-inch rims. Lug hardware, valve stems, and overall wheel condition also deserve attention on an older heavy-duty Chevrolet pickup.

The truck itself should be looked over as carefully as the tires. Steering play, worn suspension parts, brake condition, alignment, and any signs of rubbing should be addressed before putting miles on a fresh set, since new tires can quickly reveal problems that were less obvious with old or unevenly worn rubber.

Tires on a collector-driven 1980 Chevrolet Trucks K20 Cheyenne should be checked regularly for pressure loss, cracking, bulges, cuts, and uneven wear. Trucks that spend long periods parked need extra attention because age and storage conditions can affect tire condition even when tread wear is still light.

Good maintenance also includes storing the truck away from prolonged sunlight, heat, moisture, and ozone sources when possible. A visual inspection before each drive is smart on any older pickup, and occasional checks of wheel condition and clearance are worthwhile too, especially if the truck carries heavy-duty wheels or sees only seasonal road use.