The 1983 Mitsubishi Trucks Mighty Max sits in an interesting spot in compact truck history, arriving at a time when small pickups were valued for simple utility, light-duty hauling, and everyday drivability. For owners today, tire selection depends heavily on the exact Mighty Max sub-model, because this truck used more than one size and more than one construction. Fitments include 800-14 bias-ply, 185R14 radial, and GR78-15 radial sizes. That opens the door to different tire personalities, from traditional whitewall bias-ply offerings to blackwall and narrow-whitewall radial choices, with a radial equivalent path also available for 800-14. The right choice starts with sub-model, wheel diameter, and the kind of road use or restoration appearance you want.
Which Tire Size Is Right for The 1983 Mitsubishi Trucks Mighty Max
Three primary tire sizes apply to the 1983 Mitsubishi Trucks Mighty Max, and they are tied to different sub-models and wheel diameters. The first step is identifying the exact truck configuration and confirming whether it uses a 14-inch or 15-inch rim, because one fitment is bias-ply while the others are radial. Once that is settled, the decision becomes choosing the right construction, appearance, and product style within the correct size.
An 800-14 is a numeric bias-ply size, with the leading number representing nominal section width in inches and the final number indicating a 14-inch rim. On the 1983 Mitsubishi Trucks Mighty Max, this is a traditional bias-ply fitment that suits owners keeping an earlier-style tire presentation. Available choices include BFGoodrich, Universal Vintage Tire, and Goodyear, with blackwall, narrow whitewall, and wide whitewall sidewall treatments across series such as Silvertown Classic Bias Ply, Universal Classic Bias Ply, and Custom Super Cushion. It is the right size to evaluate when the truck uses the 14-inch bias-ply setup and appearance matters as much as basic fitment.
A 185R14 is a Euro-metric radial size, with 185 indicating nominal section width in millimeters, R identifying radial construction, and 14 showing the rim diameter in inches. This size gives the 1983 Mitsubishi Trucks Mighty Max a radial primary fitment on a 14-inch wheel, making it the key selection for several sub-models. Product choices include Michelin, Phoenix, and Vredestein, with blackwall and narrow whitewall options as well as series such as Michelin MXV and Sprint Classic. It is the size to focus on when the truck uses the 14-inch radial setup and the goal is to balance correct fitment with sidewall style and brand preference.
GR78-15 is an alphanumeric radial size, where the letter group identifies the tire's sizing class, the R denotes radial construction, and the final number indicates a 15-inch rim. For the 1983 Mitsubishi Trucks Mighty Max, this size is tied to the 15-inch wheel setup used on certain 4x4 configurations. Its main role in the buying process is confirming that the truck is one of the models that actually uses the 15-inch radial fitment rather than a 14-inch tire. This is the size to verify carefully when wheel diameter and sub-model are the deciding factors.
Sub-model fitment matters on the 1983 Mitsubishi Trucks Mighty Max because tire size changes across the range. Some versions use a 14-inch bias-ply or 14-inch radial setup, while certain 4x4 models move to a 15-inch radial tire, so the correct configuration should be confirmed before choosing a tire.
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1983 Mitsubishi Trucks Mighty Max Base
The 1983 Mitsubishi Trucks Mighty Max Base uses the 800-14 bias-ply fitment. That makes the key decision less about multiple primary sizes and more about choosing among traditional blackwall, narrow whitewall, wide whitewall, or considering a radial equivalent with the wheel setup checked first.
The 1983 Mitsubishi Trucks Mighty Max S uses the 185R14 radial size on a 14-inch rim. Tire selection centers on choosing among available radial products, brands, and sidewall styles rather than sorting through different primary fitments.
The 1983 Mitsubishi Trucks Mighty Max SP 4x2 also uses the 185R14 radial fitment. That keeps the buying decision focused on product character, such as blackwall versus narrow whitewall presentation and the brand or tire series that best matches the truck's intended use.
The 1983 Mitsubishi Trucks Mighty Max SP 4x4 uses the GR78-15 radial size. This makes wheel diameter especially important, since the 4x4 setup differs from the 14-inch fitments used elsewhere in the Mighty Max range.
The 1983 Mitsubishi Trucks Mighty Max SPX 4x2 uses the same 185R14 radial size as other 14-inch radial models. The practical decision is choosing the right radial product style while keeping rim-width compatibility and the truck's intended appearance in mind.
The 1983 Mitsubishi Trucks Mighty Max SPX 4x4 uses the GR78-15 radial fitment. Owners should confirm the 15-inch wheel setup first, then evaluate tires within that size rather than assuming a 14-inch Mighty Max tire will suit the truck.
Bias-Ply to Radial Tire Conversion for the 1983 Mitsubishi Trucks Mighty Max
The original 800-14 size has four radial-equivalent options to consider. Those include 205R14 as an 80-series metric radial, P215/75R14 as a P-metric 75-series radial, P225/70R14 as a lower-profile P-metric 70-series radial, and 800R14 as a bias-look radial equivalent. Together, they give you a range from metric radial sizing to a more traditional-looking radial presentation. A recommended rim-width range of 5 to 7 inches is associated with these alternatives, and each option should still be checked against wheel compatibility, overall dimensions, and clearance before conversion.
Modern Radial Equivalents
205R14
Equivalent 80-series Metric Radial (800-14)
P215/75R14
Equivalent P-metric 75-series Radial (800-14)
P225/70R14
Equivalent P-metric 70-series Radial (800-14)
800R14
Bias-look Radial Equivalent (800-14)
Important Considerations When Replacing Bias Ply With Radial
Compare overall diameter and section width carefully to ensure proper fit.
Verify recommended rim range (5-7 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 1983 Mitsubishi Trucks Mighty Max Tires for Sale
Available Mighty Max tire choices cover traditional 800-14 bias-ply options from BFGoodrich, Universal Vintage Tire, and Goodyear, plus 185R14 radial choices from Michelin, Phoenix, and Vredestein. Sidewall treatments include blackwall, narrow whitewall, and wide whitewall, with several recognizable vintage and classic tire series represented.
Owners of a 1983 Mitsubishi Trucks Mighty Max usually need to sort out sub-model fitment first, then look at size format, wheel diameter, construction type, radial alternatives, appearance, and basic road-use checks before settling on a tire.
Tire Size & Fitment
What tire size fits a 1983 Mitsubishi Trucks Mighty Max?
The 1983 Mitsubishi Trucks Mighty Max uses three different primary tire sizes depending on sub-model: 800-14, 185R14, and GR78-15. The 800-14 fitment is bias-ply, while 185R14 and GR78-15 are radial fitments tied to different truck configurations.
The practical step is confirming the exact sub-model and wheel diameter before choosing a tire. A Base truck uses a different fitment approach than an S, SP 4x2, SPX 4x2, SP 4x4, or SPX 4x4, and the 14-inch versus 15-inch wheel difference matters just as much as the tire size itself.
What size rim does a 1983 Mitsubishi Trucks Mighty Max use?
A 1983 Mitsubishi Trucks Mighty Max can use either a 14-inch or 15-inch rim, depending on the sub-model and tire size. The 800-14 and 185R14 fitments use 14-inch rims, while the GR78-15 fitment uses a 15-inch rim.
Wheel diameter should be checked before anything else because a 14-inch tire and a 15-inch tire are not interchangeable. It also helps to confirm actual wheel width and whether the truck still has its intended wheel setup, especially if it has seen aftermarket wheel changes or restoration work over the years.
Do all 1983 Mitsubishi Trucks Mighty Max sub-models use the same tire size?
No, the 1983 Mitsubishi Trucks Mighty Max does not use one tire size across every sub-model. The Base uses 800-14 bias-ply, the S, SP 4x2, and SPX 4x2 use 185R14 radial, and the SP 4x4 and SPX 4x4 use GR78-15 radial.
That difference means the buyer should identify the truck's exact sub-model before comparing brands or sidewall styles. It is easy to focus on appearance first, but fitment starts with the correct size and rim diameter, especially where 4x2 and 4x4 versions of the Mighty Max use different wheel and tire combinations.
Bias-Ply & Radial Options
Is 800-14 a bias-ply or radial tire for the 1983 Mitsubishi Trucks Mighty Max?
On the 1983 Mitsubishi Trucks Mighty Max, 800-14 is a bias-ply primary tire size. It is the fitment used on the Base model, and it represents the traditional numeric sizing format common to earlier bias-ply applications.
That matters because selecting an 800-14 tire can mean choosing between staying with the original-style bias-ply construction or evaluating a radial equivalent instead. The wheel setup should be checked carefully before any construction change, particularly for rim width, overall tire dimensions, and clearance around the fenders and suspension.
What radial tire sizes are equivalent to 800-14?
Radial equivalents for 800-14 include 205R14, P215/75R14, P225/70R14, and 800R14. Those options span an 80-series metric radial, a 75-series P-metric radial, a 70-series P-metric radial, and a bias-look radial equivalent in a traditional-looking size format.
Each of those alternatives keeps the discussion centered on the original 14-inch wheel diameter, but they are not automatic substitutions. A 5- to 7-inch rim-width range is associated with the equivalent setup, and the final choice should be checked against wheel width, vehicle clearance, and the kind of appearance the owner wants from the truck.
Can I use a bias-look radial on a 1983 Mitsubishi Trucks Mighty Max?
A bias-look radial can be considered on a 1983 Mitsubishi Trucks Mighty Max where the primary fitment is 800-14, because 800R14 is available as a bias-look radial equivalent. It offers a radial-construction alternative while staying closer to a traditional tire presentation than a modern metric size.
That option can appeal to owners who want a more vintage visual character without staying strictly with bias-ply construction. It still needs the same basic fitment checks as any other equivalent, including wheel width, overall dimensions, and body or steering clearance, rather than being treated as an automatic replacement.
Choosing the Right Tire
What should I consider when choosing a tire for a 1983 Mitsubishi Trucks Mighty Max?
The starting point is the truck's exact sub-model, because the 1983 Mitsubishi Trucks Mighty Max uses 800-14, 185R14, or GR78-15 depending on configuration. From there, the main choices are construction type, wheel diameter, sidewall appearance, brand, and the tire series available in the correct size.
A Base truck may lead toward traditional bias-ply or a radial equivalent discussion, while several other models simply need the right 14-inch or 15-inch radial fitment. Matching the tire to the way the truck will actually be used helps narrow the field, whether the goal is period-style appearance, regular road use, or a straightforward restoration-minded replacement.
What sidewall styles are available for 1983 Mitsubishi Trucks Mighty Max tires?
Sidewall choices for the 1983 Mitsubishi Trucks Mighty Max include blackwall, narrow whitewall, and wide whitewall, depending on the tire size. The 800-14 bias-ply fitment has the broadest appearance range, while 185R14 radial options include blackwall and narrow whitewall treatments.
That makes sidewall style an important part of the final decision once the correct size is established. A blackwall tends to give the truck a simpler utility look, while whitewall treatments create a more styled or restoration-oriented presentation, especially on a Base model using the 800-14 bias-ply fitment.
What brands offer tires for the 1983 Mitsubishi Trucks Mighty Max?
Available tire brands for the 1983 Mitsubishi Trucks Mighty Max include BFGoodrich, Universal Vintage Tire, Goodyear, Michelin, Phoenix, and Vredestein. The brand mix depends on the tire size, with 800-14 and 185R14 each offering different combinations of construction, series, and sidewall style.
Brand matters mainly as part of the larger fitment picture rather than as a shortcut to the right tire. Once the correct size is confirmed, compare the available series, sidewall treatments, rim-width suitability where stated, and the kind of visual presentation that makes sense for the truck's condition and intended use.
Restoration & Appearance
Which tire should I choose for a period-style 1983 Mitsubishi Trucks Mighty Max?
A period-style choice for a 1983 Mitsubishi Trucks Mighty Max starts with the correct primary size for the truck's sub-model. The Base model's 800-14 bias-ply fitment naturally supports a more traditional presentation, while 185R14 and GR78-15 radial setups suit trucks that were already using radial construction in their primary fitment.
Appearance then comes down to the tire's series and sidewall treatment rather than size alone. Buyers focused on exact historical accuracy should compare the truck against marque references, photos, or build-era documentation, since a tire can look convincingly period-style without necessarily matching every original delivery detail.
How does tire construction affect the appearance of a restored 1983 Mitsubishi Trucks Mighty Max?
Tire construction changes both stance and visual character on a restored 1983 Mitsubishi Trucks Mighty Max. An 800-14 bias-ply setup presents a more traditional vintage-truck look, while radial choices such as 185R14 or GR78-15 typically bring a later, more contemporary appearance within the truck's early-1980s context.
That distinction matters most when deciding how restoration-oriented the final presentation should be. A bias-look radial can also bridge the gap for an 800-14 application, but the visual outcome should be considered alongside wheel compatibility and overall dimensions so the truck still sits and clears properly once mounted.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1983 Mitsubishi Trucks Mighty Max?
Yes, modifications can affect tire fitment on a 1983 Mitsubishi Trucks Mighty Max even when the tire size is otherwise correct for the sub-model. Aftermarket wheels, suspension changes, altered ride height, or body modifications can change the space available for the tire and the wheel dimensions it needs.
That is especially important on a truck range that already uses both 14-inch and 15-inch fitments. Any Mighty Max that no longer has its original-style wheel and suspension setup should be checked for wheel width, steering clearance, and fender space before settling on a tire, particularly when considering an equivalent instead of the primary size.
What should I inspect before driving a 1983 Mitsubishi Trucks Mighty Max on new tires?
Before driving a 1983 Mitsubishi Trucks Mighty Max on new tires, inspect the wheels, valve stems, lug hardware, and overall tire seating, then confirm inflation pressure and basic clearance at full steering lock. It also helps to look over suspension and steering components so the new tires are not being asked to work around worn hardware.
A short test drive should be followed by another quick inspection for rubbing, unusual vibration, or loss of air pressure. Collector and lightly used trucks deserve extra attention because long storage can hide cracked rubber components, wheel corrosion, or alignment issues that only become obvious once fresh tires are installed.
How should tires on a collector 1983 Mitsubishi Trucks Mighty Max be maintained?
Tires on a collector 1983 Mitsubishi Trucks Mighty Max should be kept properly inflated, inspected regularly for cracking, cuts, bulges, and uneven wear, and protected from long periods of heat, sunlight, and ozone exposure. Low-mileage use does not stop tires from aging, so condition matters as much as tread depth.
Storage habits make a real difference on trucks that spend more time parked than driven. Periodic pressure checks, occasional movement to avoid prolonged flat spotting, and routine visual inspections before road use help preserve both bias-ply and radial tires, while any sign of age-related deterioration should be evaluated before taking the truck on the road.
