The 1984 Mitsubishi Trucks Mighty Max belongs to the compact pickup era when small Japanese trucks earned a reputation for useful size, light-duty versatility, and straightforward mechanical character. Buyers today often approach one as either a preserved survivor, a working classic, or a period-style mini-truck restoration. Tire fitment on the 1984 Mitsubishi Trucks Mighty Max is not one-size-fits-all, with 800-14 bias-ply, 185R14 radial, and GR78-15 radial applications depending on the sub-model. That creates meaningful choices in construction, sidewall appearance, and, for 800-14, several radial-equivalent directions. Getting the right tire starts with confirming the exact trim and wheel setup before weighing originality, appearance, and intended road use.
Which Tire Size Is Right for The 1984 Mitsubishi Trucks Mighty Max
Three primary tire sizes apply to the 1984 Mitsubishi Trucks Mighty Max, and they do not all serve the same configuration. Fitment varies by sub-model and by wheel diameter, so the first step is confirming whether the truck uses a 14-inch or 15-inch rim and then matching the exact sub-model before comparing bias-ply versus radial choices or sidewall style.
An 800-14 is a numeric bias-ply size in which the leading number refers to the tire's nominal section width in inches, with the decimal omitted, and the final number identifies a 14-inch rim. On the Mighty Max, this is a bias-ply fitment that suits buyers who want a more traditional construction and period-style presentation. Available choices include BFGoodrich, Universal Vintage Tire, and Goodyear in blackwall, narrow whitewall, and wide whitewall versions across series such as Silvertown Classic Bias Ply, Universal Classic Bias Ply, and Custom Super Cushion. It is the size to evaluate carefully when maintaining an original-style look or considering a radial equivalent on a 14-inch wheel.
A 185R14 is a Euro-metric radial size with a 185-millimeter nominal section width, radial construction, and a 14-inch rim diameter. This format is commonly associated with an 80-series style radial profile, making it a more familiar modern-style choice than older bias-ply sizing systems. Mighty Max buyers in this size can compare blackwall and narrow whitewall options from Michelin, Phoenix, and Vredestein, including Michelin MXV and Vredestein Sprint Classic offerings. It is a useful fitment to confirm when the truck already carries 14-inch wheels and the goal is a radial tire with either understated blackwall or restoration-friendly whitewall appearance.
GR78-15 is an alphanumeric radial size in which the letter designates the tire's size class, the series number identifies its profile family, and the final number indicates a 15-inch rim. For the Mighty Max, this radial fitment matters because it moves the truck to a different wheel diameter than the 14-inch applications. The main practical point is less about choosing among many product styles and more about confirming that the truck is one of the 4x4 sub-models that uses this 15-inch radial size. It should be chosen only after verifying the actual wheel diameter and overall setup on the truck.
Sub-model fitment matters on the 1984 Mitsubishi Trucks Mighty Max because tire size changes with both trim and wheel diameter. Some versions stay on 14-inch tires, while the 4x4 models move to a 15-inch radial, so identifying the exact sub-model is the key first step.
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1984 Mitsubishi Trucks Mighty Max Base
The 1984 Mitsubishi Trucks Mighty Max Base uses the 800-14 bias-ply size on a 14-inch rim. That makes tire selection more about choosing the right period-style presentation, sidewall treatment, or a carefully checked radial-equivalent path than deciding among multiple primary fitments.
The 1984 Mitsubishi Trucks Mighty Max S uses the 185R14 radial size on a 14-inch rim. Tire selection here centers on comparing available radial products, sidewall appearance, and wheel-width compatibility rather than sorting through multiple original-size directions.
The 1984 Mitsubishi Trucks Mighty Max SP 4x2 uses the same 185R14 radial fitment as other 14-inch radial versions. That keeps the decision focused on radial product style and wheel compatibility, with blackwall and narrow whitewall presentations offering different visual character.
The 1984 Mitsubishi Trucks Mighty Max SP 4x4 uses the GR78-15 radial size on a 15-inch rim. This makes wheel-diameter confirmation especially important, since a truck wearing 15-inch wheels should not be approached the same way as the 14-inch Mighty Max fitments.
The 1984 Mitsubishi Trucks Mighty Max SPX 4x2 also uses the 185R14 radial size on a 14-inch wheel. Buyers can concentrate on choosing among the available radial brands and sidewall styles while confirming that the truck still carries the correct 14-inch wheel setup.
The 1984 Mitsubishi Trucks Mighty Max SPX 4x4 uses the GR78-15 radial fitment on a 15-inch rim. Tire selection starts with verifying that 15-inch wheel diameter, then matching the tire to the truck's actual wheel and clearance setup rather than assuming interchange with the 14-inch models.
Bias-Ply to Radial Tire Conversion for the 1984 Mitsubishi Trucks Mighty Max
For the original 800-14 size, four radial-equivalent options are available. 205R14 is the 80-series metric radial equivalent, P215/75R14 is the P-metric 75-series radial equivalent, and P225/70R14 is the P-metric 70-series radial equivalent. An 800R14 is also available as a bias-look radial equivalent. Together, those choices range from metric and P-metric sizing to a more traditional-looking radial presentation, with a recommended rim-width range of 5 to 7 inches. Wheel width, overall dimensions, and vehicle clearance should still be checked before making the change.
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 1984 Mitsubishi Trucks Mighty Max Tires for Sale
Available Mighty Max tire choices vary by size, brand, construction, and sidewall style. The 800-14 fitment includes BFGoodrich, Universal Vintage Tire, and Goodyear bias-ply options, while 185R14 radial choices include Michelin, Phoenix, and Vredestein in blackwall and narrow whitewall form.
Tire questions on the 1984 Mitsubishi Trucks Mighty Max usually come down to size by sub-model, 14-inch versus 15-inch wheel fitment, bias-ply versus radial construction, and how to choose the right appearance and road-use setup.
Tire Size & Fitment
What tire size fits a 1984 Mitsubishi Trucks Mighty Max?
The 1984 Mitsubishi Trucks Mighty Max uses three different primary tire sizes depending on the sub-model: 800-14, 185R14, and GR78-15. The Base model 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 means the right choice starts with the exact trim and wheel diameter rather than the Mighty Max name alone. A truck that has been changed over to different wheels should be checked carefully, because the 14-inch applications and 15-inch 4x4 applications are not the same fitment path.
What size rim does a 1984 Mitsubishi Trucks Mighty Max use?
A 1984 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 on the 4x4 versions.
Rim diameter should be confirmed before choosing any tire, especially on older trucks that may have seen wheel changes over the years. Once the wheel diameter is verified, the next step is matching the tire size to the specific sub-model and checking wheel width compatibility where product specifications differ.
Why does the 1984 Mitsubishi Trucks Mighty Max have more than one tire size?
The 1984 Mitsubishi Trucks Mighty Max has more than one tire size because fitment changes by sub-model. Some versions use a 14-inch bias-ply or 14-inch radial setup, while the 4x4 models use a 15-inch radial size, so the tire choice follows the truck's configuration rather than one universal specification.
That variation matters because a size meant for one Mighty Max setup should not be assumed correct for another. Identifying whether the truck is Base, S, SP 4x2, SP 4x4, SPX 4x2, or SPX 4x4 helps narrow the size immediately and avoids confusion between 14-inch and 15-inch applications.
Bias-Ply & Radial Options
Is 800-14 a bias-ply or radial tire for the 1984 Mitsubishi Trucks Mighty Max?
On the 1984 Mitsubishi Trucks Mighty Max, 800-14 is a bias-ply tire size. It is the primary fitment for the Base model and uses a 14-inch rim, giving that version of the truck a more traditional sizing and construction format than the radial-equipped sub-models.
That matters if the goal is to preserve a period-style driving feel and appearance, or if the truck still carries wheels suited to the original bias-ply fitment. Buyers considering a change to radial construction should compare wheel width, tire dimensions, and clearance rather than assuming every 14-inch radial alternative behaves the same.
What radial tire sizes are equivalent to 800-14?
Radial equivalents for 800-14 include 205R14 as an 80-series metric radial, P215/75R14 as a 75-series P-metric radial, P225/70R14 as a 70-series P-metric radial, and 800R14 as a bias-look radial. These alternatives keep the discussion centered on 14-inch applications while offering different sizing conventions.
Each equivalent should be treated as an alternative to evaluate, not as an automatic substitute. A recommended rim-width range of 5 to 7 inches is associated with these equivalents, and the truck's wheel width, overall clearance, and intended use should still be checked before converting from the original 800-14 bias-ply fitment.
What should I check before converting my 1984 Mitsubishi Trucks Mighty Max from bias-ply to radial tires?
A bias-ply to radial conversion on a 1984 Mitsubishi Trucks Mighty Max starts with confirming the original size, wheel diameter, and wheel width. For an 800-14 application, radial alternatives include 205R14, P215/75R14, P225/70R14, and 800R14, but each one still needs to be matched to the truck's actual wheel setup.
Clearance at the fenders, suspension, and steering should be reviewed before making the change, especially on an older pickup that may not be sitting exactly as it left the factory. Tire condition on the rest of the vehicle also matters, since worn steering or suspension parts can affect how any newly installed radial feels on the road.
Choosing the Right Tire
What should I consider when choosing a 1984 Mitsubishi Trucks Mighty Max tire?
The first consideration is matching the tire to the truck's exact sub-model and wheel diameter, since the 1984 Mitsubishi Trucks Mighty Max uses 800-14, 185R14, or GR78-15 depending on configuration. After size is confirmed, the real comparison points become construction type, sidewall appearance, available brands, and wheel-width compatibility.
A Base model owner may be deciding between traditional bias-ply presentation and a radial-equivalent path, while a 185R14 radial truck may be choosing among blackwall or narrow whitewall products. Intended use matters too, because a lightly driven survivor, a restoration project, and a regularly exercised classic pickup may not call for the same priorities.
What sidewall styles are available for 1984 Mitsubishi Trucks Mighty Max tires?
Sidewall styles for 1984 Mitsubishi Trucks Mighty Max tires include blackwall, narrow whitewall, and wide whitewall, depending on the size. The 800-14 bias-ply selection offers the broadest visual range, while 185R14 radial choices appear in blackwall and narrow whitewall form.
That gives the truck owner room to tailor appearance without changing the primary size. A blackwall usually keeps the presentation simple and understated, while narrow and wide whitewalls create a more vintage look, so the right choice depends on whether the truck is being preserved, restored, or styled with a stronger period character.
What brands offer tires for the 1984 Mitsubishi Trucks Mighty Max?
Tires for the 1984 Mitsubishi Trucks Mighty Max are available from BFGoodrich, Universal Vintage Tire, Goodyear, Michelin, Phoenix, and Vredestein, depending on size. The 800-14 bias-ply fitment is represented by BFGoodrich, Universal Vintage Tire, and Goodyear, while 185R14 radial options include Michelin, Phoenix, and Vredestein.
Brand choice should be considered alongside size, construction, series, and sidewall style rather than in isolation. A buyer comparing products may also want to note details such as rim-width specification, load figure where stated, and whether the goal is a traditional-looking bias-ply setup or a classic radial presentation.
Restoration & Appearance
Which tire should I choose for a period-style 1984 Mitsubishi Trucks Mighty Max?
A period-style 1984 Mitsubishi Trucks Mighty Max should begin with the tire size used by its exact sub-model. The Base model's 800-14 bias-ply fitment creates the most traditional presentation, while the S, SP 4x2, and SPX 4x2 use 185R14 radial and the 4x4 models use GR78-15 radial.
Once the size is right, appearance choices such as blackwall, narrow whitewall, or wide whitewall can shape the truck's character without stepping outside the correct fitment family. Buyers pursuing strict originality should compare their truck against marque-specific references and vehicle history, since period-style and exact as-built presentation are not always the same thing.
How does tire construction affect the appearance of a restored 1984 Mitsubishi Trucks Mighty Max?
Tire construction can change the visual character of a restored 1984 Mitsubishi Trucks Mighty Max even when the wheel diameter stays the same. An 800-14 bias-ply setup on a Base model preserves a more traditional vintage-truck look, while radial applications such as 185R14 or GR78-15 present the truck in a more modernized period manner.
That difference is especially noticeable when sidewall style enters the decision, since blackwall, narrow whitewall, and wide whitewall each push the truck in a slightly different direction. A bias-look radial can also be considered where available if the goal is to keep a more traditional visual impression while moving away from full bias-ply construction.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1984 Mitsubishi Trucks Mighty Max?
Yes, modifications can affect tire fitment on a 1984 Mitsubishi Trucks Mighty Max. Aftermarket wheels, suspension changes, altered ride height, or body modifications can all change the space available for the correct tire size, especially on a truck that already has multiple original fitment paths across 14-inch and 15-inch applications.
Even if the truck still carries one of the original sizes, wheel width and overall clearance should be checked before installation. A modified Mighty Max may need closer attention at the steering stops, inner fender areas, and suspension travel points so the tire choice stays compatible with how the truck is actually set up today.
What should I inspect before driving a 1984 Mitsubishi Trucks Mighty Max on new tires?
Before driving a 1984 Mitsubishi Trucks Mighty Max on new tires, inspect the wheels for correct diameter and obvious damage, confirm proper inflation, and make sure the tires clear the truck at full steering lock. It is also smart to look over the old truck basics such as suspension wear, steering looseness, and any signs of uneven tire placement.
A short, careful test drive can reveal rubbing, pull, or vibration before the truck goes farther from home. Collector-era pickups often spend long periods parked, so checking for fluid leaks onto the tires, aged valve stems, and brake issues helps make the first miles on fresh tires safer and more predictable.
How should tires on a collector 1984 Mitsubishi Trucks Mighty Max be maintained?
Tires on a collector 1984 Mitsubishi Trucks Mighty Max should be maintained with regular pressure checks, visual inspections, and periodic exercise rather than long-term neglect. Even a truck that sees limited mileage can develop problems from age, storage conditions, and underinflation, so the sidewalls, tread, and general shape deserve routine attention.
Storage plays a major role in tire life on an older pickup. Keeping the truck away from prolonged sunlight, heat, moisture, and ozone sources can help preserve the tires, while occasional inspection for cracks, bulges, cuts, and slow air loss helps catch problems before a weekend drive or show trip.
