1973 International Pickup 1010 Tires

The 1973 International Pickup 1010 uses two primary tire sizes: G78-15 and H78-15. Both are vintage alphanumeric bias-ply sizes designed for 15-inch rims, and both appear across the covered 1010 sub-models with 1/2-20 studs and 5/8-18 studs.

That means the key fitment question is not the stud variation, but which of the two sizes matches the truck’s actual wheel and tire setup. Checking the size already mounted, confirming the wheel diameter, and comparing clearance around the fenders and steering components will help determine whether G78-15 or H78-15 is the better starting point.

Both primary tire sizes for the 1973 International Pickup 1010, G78-15 and H78-15, are built for 15-inch rims. That gives the truck a consistent rim diameter across its supported fitments, even though the tire size itself can vary.

Rim diameter is only part of the picture, so it is still worth checking the actual wheel on the truck before choosing tires. Width can matter as well, especially if the pickup has replacement wheels, older aftermarket steel wheels, or a setup that differs from what it carried earlier in its life.

G78-15 is a vintage alphanumeric bias-ply tire size. The G78 portion identifies the tire’s size family within an older sizing system, and the 15 indicates that it mounts on a 15-inch wheel.

For a 1973 International Pickup 1010, that size points to a traditional bias-ply fitment rather than a modern metric radial format. Buyers often use that information to decide whether to stay with an original-era style tire, compare another primary size already used on the truck, or evaluate a radial equivalent that remains close to the same sizing class.

G78-15 is a bias-ply tire size on the 1973 International Pickup 1010. It uses the vintage alphanumeric sizing system and represents one of the truck’s primary original-era fitment formats on a 15-inch rim.

Staying with bias-ply keeps the truck in a traditional construction style and preserves access to period-style sidewall choices such as wide whitewall or blackwall truck designs. A buyer considering a radial alternative should treat that as a separate conversion decision and check wheel width, overall tire dimensions, and available clearance before making the change.

For G78-15, radial equivalents include 205R15, P215/75R15, P225/70R15, and the bias-look radial 710R15. For H78-15, the equivalent choices are 215R15, P225/75R15, P235/70R15, and the bias-look radial 760R15.

Those options give the 1973 International Pickup 1010 several ways to move from a vintage bias-ply size into radial sizing conventions while staying within the same 15-inch wheel diameter. A 6-8 inch rim-width range is part of the equivalent fitment picture, but wheel compatibility and truck clearance should still be checked before treating any equivalent as an automatic substitute.

Start by identifying whether the truck currently uses G78-15 or H78-15, then compare the available radial equivalents for that exact size. The wheel diameter remains 15 inches, but radial choices shift into metric, P-metric, or bias-look radial formats and should be matched to the correct wheel width range.

A careful conversion also means looking beyond the size code. Wheel width, actual tire clearance at full steering angle, suspension condition, and the truck’s intended use all matter, especially on an older pickup that may have seen wheel changes over the years. That makes a visual and dimensional check more important than assuming any one equivalent will simply drop into place.

The first step is confirming whether the truck should stay with G78-15 or H78-15, since both are primary 15-inch bias-ply fitments for the 1973 International Pickup 1010. From there, the main selection points are tire appearance, intended use, and whether a traditional bias-ply construction or a separate radial-equivalent path makes more sense.

Some buyers will prefer a wide whitewall presentation for a more restoration-oriented look, while others may want a blackwall truck tire with a more work-focused character. It also helps to compare wheel-width compatibility, maximum load figures where shown, and how the truck will actually be driven rather than choosing on sidewall style alone.

The available sidewall styles for 1973 International Pickup 1010 tires are wide whitewall and blackwall. Wide whitewall options appear in the Coker Classic Bias Ply line, while blackwall choices are available in STA truck-oriented series.

That gives the truck two very different visual directions even within the same correct tire size family. A wide whitewall tends to support a more period-style or restoration-focused presentation, while a blackwall often suits a more utilitarian pickup look. Matching the sidewall style to the truck’s finish, trim, and intended personality usually produces a better result than choosing by size alone.

Coker Classic and STA both offer tires for the 1973 International Pickup 1010 in its G78-15 and H78-15 bias-ply fitments. Coker Classic covers the wide whitewall side of the lineup, while STA appears in blackwall truck-style offerings such as Super Traxion and Traxion.

Brand choice matters most when it reflects the kind of truck you are building. A whitewall-focused pickup and a more utility-minded blackwall pickup can both use correct-size tires, but they present very differently. Comparing each brand’s available series, sidewall treatment, load figures where shown, and rim-width compatibility usually leads to the clearest decision.

A period-style 1973 International Pickup 1010 starts with one of its primary bias-ply sizes, G78-15 or H78-15, on a 15-inch rim. Within those sizes, the strongest period-style choices depend on whether the truck should lean toward a broad whitewall presentation or a more work-truck blackwall appearance.

Bias-ply construction helps preserve the right visual era for many restorations, but appearance details still deserve a second look before purchase. Trucks from this period could be personalized in many ways, so buyers concerned with exact originality should compare tire presentation with photos, marque references, and vehicle-specific restoration evidence rather than relying on size alone.

Tire construction influences the restored look of a 1973 International Pickup 1010 because bias-ply and radial tires present differently even when they occupy related sizing territory. The truck’s primary fitments, G78-15 and H78-15, are bias-ply sizes and naturally support a more original-era visual character.

A radial equivalent can still be worth considering, especially when road-use priorities differ from a pure restoration approach, but the visual impression may shift with the sizing format and sidewall treatment. Buyers trying to maintain a distinctly vintage stance often begin with the correct bias-ply size, then evaluate whether construction change or sidewall style alters the truck’s intended presentation.

Yes, modifications can affect tire fitment on a 1973 International Pickup 1010 even when the tire size is otherwise correct. Changes such as aftermarket wheels, altered wheel width, suspension adjustments, or body and steering component differences can all influence how G78-15 or H78-15 sits on the truck.

That is why modified trucks should be checked as complete assemblies rather than by size code alone. Measuring the actual wheel diameter and width, turning the steering through its full range, and looking for clearance at the fenders and suspension can prevent fitment surprises, especially when moving between the two primary sizes or considering a radial equivalent.

Before driving a 1973 International Pickup 1010 on new tires, inspect wheel condition, valve stems, lug hardware, and inflation pressure, then confirm that the tires seat properly and clear the truck at straight-ahead and turned positions. It is also smart to verify that the chosen size matches the wheel setup now on the vehicle.

An older pickup can hide issues that are unrelated to the new tires themselves, including worn steering parts, weak shocks, or brake pull that only becomes obvious once fresh rubber is installed. A short test drive followed by a second visual inspection helps catch rubbing, unusual wear patterns, or air loss before the truck is used more seriously.

Collector-use G78-15 or H78-15 tires on a 1973 International Pickup 1010 should be maintained with regular pressure checks, visual inspections, and careful storage habits. Even low-mileage trucks need attention for sidewall cracking, tread condition, cuts, bulges, and slow air loss because age and environment matter as much as mileage.

A pickup that sits for long periods benefits from being stored away from direct sunlight, excessive heat, moisture, and ozone sources such as electric motors. It also helps to inspect the tires before each outing and after longer storage intervals. That routine is especially important on vintage bias-ply tires, where condition and setup deserve as much attention as tread depth.