1981 Ford Trucks F-250 Custom Tires

The 1981 Ford Trucks F-250 Custom uses four primary tire sizes: 800-16.5, 875-16.5, 8.75R16.5, and 950-16.5. The correct one depends on the exact sub-model, including whether the truck is 4x2 or 4x4, whether it is a Super Cab or Super Cab Long Bed, and its GVWR classification.

That means there is no single size that covers every 1981 F-250 Custom. Before choosing a tire, match the truck to its exact configuration and confirm the current 16.5-inch wheel setup, especially if the truck has had years of work use, wheel swaps, or suspension changes that may have altered what is currently installed.

The tire fitments used on the 1981 Ford Trucks F-250 Custom are built around a 16.5-inch rim diameter. That applies across the vehicle’s supported sizes, including the bias-ply 800-16.5, 875-16.5, and 950-16.5, as well as the radial 8.75R16.5 used on certain sub-models.

Rim diameter is only part of the fitment picture on an older heavy-duty truck. Wheel width also matters, and the actual wheel on the truck should be checked before mounting new tires, particularly if the vehicle has been modified or if replacement wheels were installed at some point during its working life.

The 1981 Ford Trucks F-250 Custom was offered in multiple configurations, and tire fitment changes with body style, drivetrain, and GVWR. Some sub-models stay with bias-ply sizes such as 800-16.5, 875-16.5, or 950-16.5, while certain versions also use the radial 8.75R16.5.

Those differences reflect the truck’s intended load range and configuration rather than random variation. The practical takeaway is to identify the truck exactly as equipped before selecting a tire, because choosing by year and model alone can easily put a buyer into the wrong size or the wrong construction type.

For the 1981 Ford Trucks F-250 Custom, 8.75R16.5 is a radial tire size. The R in the size designation marks radial construction, and this fitment appears on certain sub-models alongside separate bias-ply options such as 800-16.5, 875-16.5, and 950-16.5 used elsewhere in the lineup.

That distinction matters because the truck should be matched to the tire type used by its exact configuration. A buyer should confirm the sub-model, wheel setup, and overall goal for the truck before changing constructions, since a radial-equipped F-250 Custom should not be treated the same way as one staying on a traditional bias-ply setup.

The right answer depends on which sub-model of 1981 Ford Trucks F-250 Custom is being fitted. Bias-ply sizes are primary fitments across much of the range, while some configurations use the radial 8.75R16.5 as a primary fitment. The choice should start with what the truck’s exact configuration actually calls for.

After that, the decision becomes one of purpose. A restoration-minded truck may stay with the traditional bias-ply approach, while a sub-model that uses 8.75R16.5 should be evaluated as a radial application. Wheel compatibility, clearance, and the truck’s actual working or road use should all be checked before changing construction type.

Start by confirming that the specific 1981 Ford Trucks F-250 Custom sub-model actually has a radial fitment available, because this truck does not use one radial size across the entire lineup. The wheel must be the correct 16.5-inch diameter, and its width and condition should be checked before any change in tire construction is considered.

A conversion should also account for the truck’s current suspension condition, steering travel, and clearance at the fenders and under load. On an older F-250 Custom, years of replacement parts, wheel swaps, or ride-height changes can affect fitment, so the actual truck needs to be measured and inspected rather than judged by size markings alone.

Begin with the exact sub-model and its correct primary size, because the 1981 Ford Trucks F-250 Custom uses more than one 16.5-inch tire. Depending on configuration, the truck may require 800-16.5, 875-16.5, 8.75R16.5, or 950-16.5, and that decision comes before comparing brands or tread series.

Once the proper size is confirmed, compare construction type, wheel compatibility, and the character of the available truck tire series. For a work-oriented or restoration-minded truck, it also helps to think about how the tire will be used, whether the truck still has its original-style wheel setup, and whether the goal is traditional appearance or matching a radial application.

The available tires for the 1981 Ford Trucks F-250 Custom come from STA. Within the supported bias-ply 16.5-inch sizes, STA offerings include truck-oriented series such as Super Transport, Traxion, and Transport Highway, depending on the exact size being selected for the truck’s configuration.

Since the brand choice is narrow, the more useful comparison is between series, size, and wheel compatibility rather than trying to rank manufacturers. Buyers should look at which series is offered in the correct tire size for the truck, then review load-related specs where available and confirm the wheel matches the intended application.

The 1981 Ford Trucks F-250 Custom has available tires in the STA Super Transport, Traxion, and Transport Highway series. Series availability depends on the size, with 800-16.5, 875-16.5, and 950-16.5 carrying different combinations of those truck-focused bias-ply lines.

That matters because the series is one of the main ways to compare the available product grid once the correct size is known. A buyer should first lock in the proper fitment for the truck’s exact GVWR and body style, then compare which series is offered in that size and whether its wheel specifications match the truck’s actual rim.

A period-style 1981 Ford Trucks F-250 Custom usually starts with the correct primary size for the exact sub-model and a tire that keeps the truck’s traditional heavy-duty look. In the available product range, that means blackwall STA truck tires in the appropriate 16.5-inch bias-ply size used by the truck’s configuration.

The final choice depends on how closely the truck is being preserved and how it will be used. For a restoration-oriented project, matching the proper size and construction matters more than chasing extra variation, while buyers concerned with exact historical presentation should compare their truck against period literature or marque-specific references.

Yes, correct tire fitment matters on a 1981 Ford Trucks F-250 Custom restoration because this truck was offered in several configurations with different primary sizes. Using the right 16.5-inch fitment helps preserve the truck’s proper stance, utility character, and the overall look expected from a heavy-duty Ford pickup of this period.

Fitment also affects more than appearance. A tire that does not match the sub-model’s intended size or construction can complicate wheel compatibility and road-use checks, so restorers should verify the exact configuration first and then choose a tire that supports both the visual goal and the truck’s practical service requirements.

Yes, modifications can affect tire fitment on a 1981 Ford Trucks F-250 Custom even when the truck still uses a 16.5-inch wheel. Aftermarket wheels, suspension changes, ride-height adjustments, and body or fender alterations can all influence whether the intended tire size clears properly and sits on the wheel as expected.

That is especially important on an older heavy-duty pickup that may have seen years of repair or adaptation for work use. A buyer should inspect the actual wheel width, check steering and fender clearance, and make sure the chosen tire size matches the truck as it exists now rather than assuming every truck still carries its original setup.

Before driving a 1981 Ford Trucks F-250 Custom on new tires, inspect the wheels for correct diameter and condition, make sure the tires are mounted in the proper size for the sub-model, and confirm inflation is appropriate for the tire being used. It also helps to look for obvious clearance issues with steering turned and suspension loaded.

A roadworthy check on a collector-era truck should include more than the tires alone. Brake condition, suspension wear, and any signs of rubbing, air loss, sidewall damage, or uneven tread behavior should be addressed early, especially on a vehicle that may have spent long periods parked before returning to regular road use.

Tires on a collector 1981 Ford Trucks F-250 Custom should be inspected regularly for air loss, cracking, cuts, bulges, and uneven wear, even if the truck is driven only occasionally. Older trucks often spend more time parked than in service, so tire condition can change with age and storage exposure as much as with mileage.

Good maintenance also means keeping the truck stored away from prolonged sunlight, excess heat, moisture, and ozone sources when possible. Pressure checks should be part of routine upkeep, and any truck that has sat for an extended period deserves a fresh look at the tires, wheels, and clearances before a longer drive.