The 1974 Ford F-150 came from the first generation of Ford’s F-Series to carry the F-150 name, placing it right at the beginning of a long-running half-ton truck story. These trucks were built for real work, but today they also appeal to restorers, vintage truck owners, and drivers who want a usable classic with the right stance. Tire fitment on the 1974 Ford F-150 is not one-size-fits-all, with both 15-inch and 16.5-inch wheel applications and a mix of bias-ply and radial-era choices depending on sub-model. That opens the door to blackwall truck tires, whitewall options, and selected radial equivalents. The key is matching the tire to the truck’s exact GVWR, drive configuration, wheel diameter, and intended look.
Which Tire Size Is Right for The 1974 Ford F-150
The 1974 Ford F-150 uses six primary tire sizes, and the right one depends on the truck’s exact sub-model, GVWR, construction type, and wheel diameter. Some versions use 15-inch tires, while others use 16.5-inch tires, so confirming the actual wheel on the truck is the first step before comparing tread style, sidewall appearance, or radial-equivalent alternatives.
A 700-15 is a numeric bias-ply size in which the leading number refers to nominal section width, about 7.00 inches, and the final number identifies a 15-inch rim. On the 1974 Ford F-150, this is a traditional truck fitment used on certain 15-inch wheel applications where a bias-ply construction suits a period-style setup. Available choices include Firestone, BFGoodrich, and STA products, with blackwall and wide whitewall styles plus truck-oriented series such as Traxion, Transport Highway, and military-pattern designs. This size makes sense when the truck is equipped with the correct 15-inch wheel and the goal is to stay with an older truck-tire look.
L78-15 is a vintage alphanumeric bias-ply size, where the letter and series indicate the tire’s size class and profile family, and the 15 identifies rim diameter. For the 1974 Ford F-150, it is one of the main 15-inch fitments and gives buyers a broad mix of bias-ply choices for either restoration-oriented appearance or truck use. This size is available from Coker Classic, BFGoodrich, and STA, with blackwall, narrow whitewall, wide whitewall, and dual-white-stripe presentations across passenger-style and truck-style series. It is a size worth evaluating carefully when the truck uses 15-inch wheels and appearance matters as much as load-oriented character.
LR78-15 is an alphanumeric radial size, with the R in the code indicating radial construction and the 15 marking a 15-inch rim. On the 1974 Ford F-150, this size stands apart from the bias-ply offerings by giving a radial-format option within the vintage sizing family for certain 4x2 applications. The available choice is a Firestone Steel Belted 721 in a narrow whitewall configuration from the Wide Oval Radial series, giving it a distinctly period-inspired radial presentation. This size is most relevant when the truck already uses the proper 15-inch wheel and the owner wants a radial-type option without moving to a modern metric size.
An 800-16.5 is a numeric bias-ply truck size, with the leading number indicating nominal section width of about 8.00 inches and the final number calling for a 16.5-inch rim. For the 1974 Ford F-150, this size belongs to heavier 4x2 applications that use the larger wheel diameter, making wheel confirmation especially important before any purchase. Available products come from STA in blackwall form, including Super Transport and Traxion series that reflect a traditional truck-tire approach. This size should be chosen only when the truck is actually equipped with 16.5-inch wheels, since 15-inch and 16.5-inch fitments are not interchangeable.
The 875-16.5 size is another numeric bias-ply truck fitment, with an approximate nominal section width of 8.75 inches and a 16.5-inch rim requirement. On the 1974 Ford F-150, it appears on certain higher-GVWR 4x2 configurations that use the 16.5-inch wheel setup rather than the more common 15-inch applications. STA offers this size in blackwall truck-oriented lines such as Traxion and Transport Highway, both aimed at owners who want a traditional work-truck appearance. It is a size to consider only after confirming that the truck’s wheels are truly 16.5-inch and that the broader truck-style tire matches the vehicle’s use and stance.
H78-15 is a vintage alphanumeric bias-ply tire size, using the letter and series to indicate its general width and profile family, with a 15-inch rim diameter. For the 1974 Ford F-150, it is a specific 15-inch fitment used on certain 4x4 applications, so it should not be assumed to apply across every truck in the model line. Available products include Coker Classic wide whitewall versions and an STA Traxion blackwall, giving buyers a choice between a more restoration-minded look and a more truck-oriented presentation. This size deserves attention when selecting for a 4x4 because both fitment accuracy and overall visual character can change the finished result.
Sub-model fitment on the 1974 Ford F-150 varies by drive type and GVWR, so the right tire depends on identifying the exact truck first. That matters because some versions use 15-inch fitments, others use 16.5-inch wheels, and one 4x2 application includes a radial-format choice.
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1974 Ford F-150 4x2 (GVWR 6050)
This 4x2 6050-GVWR version uses 15-inch tire fitments and is the only covered sub-model that includes both traditional bias-ply choices and an LR78-15 radial-format option. Tire selection here starts with confirming whether the truck is staying period-style with 700-15 or L78-15, or moving toward the LR78-15 radial presentation on the correct wheel.
This 4x2 6150-GVWR F-150 uses 16.5-inch bias-ply truck sizes rather than the 15-inch sizes seen on other sub-models. Choosing tires for this truck begins with verifying that the wheels are still 16.5-inch, then comparing the available blackwall truck-style options in the correct size.
The 4x4 6050-GVWR version stays with 15-inch bias-ply fitments, centered on traditional truck and vintage-style sizing. That makes the decision less about construction type and more about selecting the right 15-inch size, sidewall treatment, and tire series for the truck’s intended appearance and use.
This 4x4 6150-GVWR sub-model has multiple 15-inch bias-ply size paths, including 700-15, H78-15, and L78-15. Tire choice here depends on confirming the truck’s actual wheel and current setup, then deciding whether the goal is a more work-truck blackwall look or a more restoration-oriented whitewall presentation.
The 4x4 6350-GVWR F-150 uses 15-inch bias-ply fitments and does not introduce the 16.5-inch wheel complication seen on one 4x2 variant. Selection is mainly about matching the truck to the correct 15-inch size and then choosing among the available period-style and truck-oriented product options.
Bias-Ply to Radial Tire Conversion for the 1974 Ford F-150
Radial equivalents are available for two primary 15-inch bias-ply sizes on the 1974 Ford F-150. L78-15 can be compared with 235R15 as an 80-series metric radial, P235/75R15 as a 75-series P-metric radial, P255/70R15 as a 70-series P-metric radial, and 820R15 as a bias-look radial. H78-15 equivalents include 215R15, P225/75R15, P235/70R15, and the 760R15 bias-look radial. These choices span traditional metric, later P-metric, and bias-look presentations; the stated rim-width range is 6-8 inches, and wheel fit, dimensions, and clearance should still be checked before changing sizes or construction.
Modern Radial Equivalents
235R15
Equivalent 80-series Metric Radial (L78-15)
P235/75R15
Equivalent P-metric 75-series Radial (L78-15)
P255/70R15
Equivalent P-metric 70-series Radial (L78-15)
820R15
Bias-look Radial Equivalent (L78-15)
215R15
Equivalent 80-series Metric Radial (H78-15)
P225/75R15
Equivalent P-metric 75-series Radial (H78-15)
P235/70R15
Equivalent P-metric 70-series Radial (H78-15)
760R15
Bias-look Radial Equivalent (H78-15)
Important Considerations When Replacing Bias Ply With Radial
Compare overall diameter and section width carefully to ensure proper fit.
Verify recommended rim range (6-8 in) and load needs match your vehicle specifications.
Check fender clearance, steering clearance, and stance before installation.
Consider suspension condition and intended road use when choosing equivalents.
Important Fitment Notes
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1974 Ford F-150 Tires for Sale
Available 1974 Ford F-150 tire choices span 700-15, L78-15, LR78-15, 800-16.5, 875-16.5, and H78-15 fitments from Firestone, BFGoodrich, Coker Classic, and STA. The product mix includes blackwall, narrow whitewall, wide whitewall, and dual-white-stripe styles across classic bias-ply, truck-oriented, and period-style radial series.
These FAQs focus on the exact tire sizes used on the 1974 Ford F-150, how fitment changes by sub-model and wheel diameter, and what to consider when choosing between bias-ply, radial-style, truck, and restoration-oriented options.
Tire Size & Fitment
What tire size fits a 1974 Ford F-150?
A 1974 Ford F-150 can use 700-15, L78-15, LR78-15, 800-16.5, 875-16.5, or H78-15, depending on the truck’s drive type and GVWR. Most applications stay on 15-inch wheels, while certain 4x2 6150-GVWR trucks use 16.5-inch sizes instead.
The first step is identifying the exact sub-model and confirming the actual wheel diameter on the truck. Many older F-Series pickups have been changed over the years, so the best approach is to match the tire size to the truck’s current wheel setup before comparing sidewall style, tire series, or any radial-equivalent option.
What size rim does a 1974 Ford F-150 use?
The 1974 Ford F-150 uses either a 15-inch or 16.5-inch rim, depending on the sub-model and tire size. Sizes 700-15, L78-15, LR78-15, and H78-15 are 15-inch fitments, while 800-16.5 and 875-16.5 require 16.5-inch wheels.
Rim diameter matters before anything else because a 15-inch tire and a 16.5-inch tire are completely different fitments. Older trucks are often modified or fitted with replacement wheels, so checking the wheel itself is more reliable than assuming the truck still carries its original setup.
Do all 1974 Ford F-150 sub-models use the same tire size?
No, 1974 Ford F-150 sub-models do not all use the same tire size. Fitment changes across 4x2 and 4x4 versions and also varies by GVWR, with some trucks using 15-inch sizes and one heavier 4x2 application using 16.5-inch truck tires.
That variation means the tire decision starts with the exact sub-model, not just the model name on the fender. Once the truck’s drive configuration, GVWR, and actual wheel diameter are confirmed, it becomes much easier to narrow the choice to the correct size and then compare appearance, construction, and product style.
Bias-Ply & Radial Options
Is L78-15 a bias-ply or radial tire for the 1974 Ford F-150?
L78-15 is a bias-ply tire size on the 1974 Ford F-150. It is one of the primary vintage 15-inch fitments used on several sub-models, and the available L78-15 products are bias-ply offerings across both passenger-style and truck-oriented series.
That matters because a buyer deciding on L78-15 is usually choosing whether to keep the truck in a traditional bias-ply format or consider one of the separate radial-equivalent sizes instead. Wheel width, vehicle stance, and the truck’s intended use should all be checked before changing construction from the original size family.
What radial tire sizes are equivalent to L78-15?
Radial equivalents for L78-15 include 235R15 as an 80-series metric radial, P235/75R15 as a 75-series P-metric radial, P255/70R15 as a 70-series P-metric radial, and 820R15 as a bias-look radial. The recommended rim-width range associated with these equivalents is 6-8 inches.
Those options give different sizing conventions and a different visual approach, especially when comparing a standard metric radial with a bias-look radial. The right choice still depends on the truck’s wheel width, overall wheel setup, and available clearance, so an equivalent should be treated as an alternative to evaluate rather than an automatic swap.
What should I check before converting my 1974 Ford F-150 from bias-ply to radial tires?
Start by confirming the truck’s actual tire size, wheel diameter, and wheel width. On a 1974 Ford F-150, that is especially important because the model line spans both 15-inch and 16.5-inch applications, and radial equivalents are only identified for certain 15-inch bias-ply sizes.
After that, compare the intended radial size against the truck’s wheel compatibility and available clearance at the front suspension and fenders. A truck that has aftermarket wheels, ride-height changes, or a mixed set of older components deserves extra attention before conversion, even when the radial size is a recognized equivalent.
Choosing the Right Tire
What should I consider when choosing a 1974 Ford F-150 tire?
The main factors are the truck’s exact sub-model, wheel diameter, and the correct size family for that setup. A 1974 Ford F-150 may need a 15-inch bias-ply size, an LR78-15 radial-format tire, or a 16.5-inch truck tire, so choosing by appearance alone can lead to the wrong fitment.
Once the size is confirmed, compare construction type, sidewall style, rim-width compatibility, load-oriented specs where stated, and whether the truck is being restored or driven as a working-style classic. That approach keeps the tire choice tied to how the truck is actually built and how it will be used.
What sidewall styles are available for 1974 Ford F-150 tires?
Sidewall styles for 1974 Ford F-150 tires include blackwall, narrow whitewall, wide whitewall, and dual-white-stripe depending on the tire size selected. Blackwall dominates the truck-oriented sizes, while some 15-inch vintage sizes add whitewall choices for a more restoration-minded presentation.
Sidewall style should be chosen after the correct size and wheel have been confirmed. A blackwall often suits a utility or work-truck look, while whitewall variations can shift the truck toward a more polished period-style appearance, especially on 15-inch applications where the product range is broader.
What brands offer tires for the 1974 Ford F-150?
Tires for the 1974 Ford F-150 are available from Firestone, BFGoodrich, Coker Classic, and STA. Brand availability depends on size, with some sizes centered on classic passenger-style bias-ply products and others focused on truck-oriented blackwall tires.
The useful comparison is not simply brand name but how each option matches the truck’s size, construction, and visual goal. A 15-inch vintage fitment may offer more variety in sidewall treatment, while a 16.5-inch truck size is more narrowly focused on traditional blackwall truck-tire series.
Restoration & Appearance
Which tire should I choose for a period-style 1974 Ford F-150?
A period-style 1974 Ford F-150 tire choice starts with the truck’s correct original size family for its sub-model, then narrows to the appearance you want. Bias-ply sizes such as 700-15, L78-15, and H78-15 carry the most traditional presentation, while truck-oriented blackwalls and vintage-style whitewalls create very different finished looks.
Restoration-minded buyers should decide whether the goal is work-truck authenticity, a cleaner showroom-style appearance, or a road-use compromise that still looks appropriate. When exact originality matters, it is smart to compare the tire choice against period photos, build records, or marque-specific restoration references for that truck.
How does tire construction affect the appearance of a restored 1974 Ford F-150?
Tire construction changes more than ride feel on a restored 1974 Ford F-150; it also changes the truck’s visual character. A bias-ply tire gives the truck a more traditional vintage presentation, while a radial or bias-look radial can shift the appearance toward a later or more road-focused look.
That visual difference is especially important on 15-inch applications where both classic bias-ply styling and radial-style alternatives are part of the conversation. Buyers restoring for judged authenticity usually pay close attention to construction, sidewall treatment, and size format because those details strongly influence how finished the truck looks.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1974 Ford F-150?
Yes, modifications can affect tire fitment on a 1974 Ford F-150. Aftermarket wheels, altered ride height, suspension changes, brake conversions, and body modifications can all change the space available for the tire, even when the size itself is correct for a stock sub-model.
That is especially relevant on an older truck with multiple original wheel diameters and several fitment paths. A modified F-150 should have its actual wheel diameter, wheel width, and turning clearance checked at the vehicle before any new tire is chosen, particularly when moving between bias-ply and radial-style setups.
What should I inspect before driving a 1974 Ford F-150 on new tires?
Before driving a 1974 Ford F-150 on new tires, inspect the wheels for the correct diameter and condition, confirm the tires are mounted in the proper size, and check for adequate clearance at the fenders and steering components. Tire pressure should also be set appropriately for the selected tire and vehicle use.
A short test drive is a good time to watch for rubbing, steering interference, vibration, or unusual pull. On a vintage truck, it also helps to inspect suspension and steering parts at the same time, because worn components can affect how even a correctly sized new tire behaves on the road.
How should tires on a collector 1974 Ford F-150 be maintained?
Tires on a collector 1974 Ford F-150 should be checked regularly for air loss, tread wear, sidewall cracking, cuts, and bulges, especially if the truck spends long periods parked. Collector vehicles often age their tires through time and storage conditions as much as through mileage.
Keeping the truck stored away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve tire condition. It is also wise to inspect the tires before longer drives rather than assuming low miles mean low risk, since an older truck may sit for extended periods between uses.
