Isuzu I-Mark Tires

The Isuzu I-Mark uses five tire sizes across the 1983 through 1989 model years: 155R13 for 1983-1984, 175/70R13 for 1983-1989, 205/60R14 for 1987-1988, 185/60R14 for 1988-1989, and 155/80R13 for 1988-1989. The 155R13, 175/70R13, and 155/80R13 sizes all fit 13-inch rims, while 205/60R14 and 185/60R14 fit 14-inch rims.

That spread means year alone is not always enough to identify the correct tire for an Isuzu I-Mark, especially in 1988 and 1989 when several fitments overlap. Start with the year, then verify the actual wheel diameter on the car and compare the current tire markings before choosing among the listed sizes.

On an Isuzu I-Mark, 155R13 is an older euro-metric radial size used on 1983 and 1984 applications. The 155 indicates nominal section width in millimeters, the R identifies radial construction, and the 13 is the required rim diameter in inches. Unlike a size such as 155/80R13, the aspect ratio is not written into the code even though the tire still follows a tall-profile passenger-car format.

That matters because 155R13 should not be treated as interchangeable with every other 13-inch Isuzu I-Mark tire without checking proportions and intended fitment. If your car is an early model, compare the size stamped on the current tire and the wheel diameter before choosing between 155R13 and the wider 175/70R13 alternative.

The 1988 Isuzu I-Mark shows four tire sizes because the model range included both 13-inch and 14-inch wheel fitments that year. The 13-inch group includes 155/80R13 and 175/70R13, while the 14-inch group includes 185/60R14 and 205/60R14. That is a wheel-diameter split first, with additional variation in section width and profile within each rim size.

For a 1988 Isuzu I-Mark, the practical question is not simply which tire was used in that year, but which wheel package is actually on the car. Check the wheel diameter directly, then match the existing size or factory reference for the specific configuration rather than choosing from the full 1988 list at random.

The Isuzu I-Mark uses both 13-inch and 14-inch rim diameters across its production run. All 1983 through 1986 fitments are 13-inch, and the first 14-inch fitment appears in 1987 with 205/60R14. Later years continue to mix 13-inch and 14-inch applications, so the model does not have one universal wheel diameter.

Wheel diameter is the most important first check on an Isuzu I-Mark because a 13-inch tire cannot be installed on a 14-inch wheel, and the reverse is equally true. If the current tires are missing or the car has changed hands several times, measure the wheel or read the marking stamped on the existing tire before making a selection.

A 1988 Isuzu I-Mark can use 155/80R13, 175/70R13, 185/60R14, or 205/60R14 depending on the wheel package and configuration. Two of those sizes fit 13-inch wheels and two fit 14-inch wheels, so the year itself does not narrow the choice enough. The correct approach is to confirm the wheel diameter first and then compare the exact size printed on the current tire or listed in original vehicle literature.

That same method works for any overlapping Isuzu I-Mark year, especially 1987 through 1989. If the car has aftermarket wheels or has been restored over time, rely on what is physically on the car and what the specific configuration calls for rather than assuming all examples from one model year used the same tire.

Isuzu I-Mark tire offerings include blackwall, narrow whitewall, and wide whitewall sidewall styles. Blackwall options appear in 175/70R13, 155R13, and 185/60R14, while 155/80R13 is available in narrow whitewall and wide whitewall versions as well as a blackwall-free classic presentation. The whitewall choices are concentrated in the 13-inch 155/80R13 size.

That gives an Isuzu I-Mark owner some flexibility between a more standard 1980s blackwall look and a more stylized presentation, particularly on late cars using 13-inch wheels. If appearance matters as much as size, decide on the tire size first, then compare the available sidewall treatment within that exact fitment.

The currently listed Isuzu I-Mark tire brands are Avon, Michelin, Dunlop, Travelstar, BFGoodrich, Maxxis, and Tornel. Avon covers 175/70R13, Michelin appears in both 155R13 and 185/60R14, Dunlop appears in 155R13, and the 155/80R13 size carries the broadest brand spread with Travelstar, BFGoodrich, Maxxis, and Tornel offerings.

Brand choice on an Isuzu I-Mark depends partly on which size your car requires, because not every fitment has the same range of options. Once the correct size and rim diameter are confirmed, compare sidewall style, intended appearance, and construction details within that size rather than trying to choose a brand first.

The Isuzu I-Mark listings include several distinct radial tire series, including Avon CR6ZZ, Michelin XAS-FF, SP Sport Aquajet, Michelin Pilot Exalto PE2, UN106, Silvertown Radial, Classic Whitewall MA-1, and Tornel Classic. Some are performance-oriented blackwall radials, while others are classic-style radials offered with narrow or wide whitewall sidewalls. All of the listed options for the I-Mark use radial construction rather than bias-ply construction.

For an Isuzu I-Mark owner, the real difference between these series is usually the balance between period appearance and modern road manners within the correct size. A blackwall radial generally suits a standard late-1980s look, while the whitewall series are more appearance-driven and may appeal to a customized or distinctive presentation on 13-inch applications.

An Isuzu I-Mark should be stored on a clean, dry surface away from direct sunlight, ozone sources, and extreme temperature swings while the tires remain fitted. Proper inflation matters even during storage, because an underinflated tire can develop flat spotting or sidewall stress when the car sits for long periods. Washing off road grime and keeping solvents and petroleum products away from the tires also helps preserve the rubber.

If an Isuzu I-Mark will sit for months, move it periodically or support it in a way that reduces constant load on one contact patch. Collector-car owners should also inspect the tires before the car goes into storage and again before returning it to road use, since age-related changes can appear even when mileage stays low.

Tires on an Isuzu I-Mark should be inspected before regular driving and at frequent intervals even when the car sees limited use. Check inflation, tread condition, sidewall cracking, bulges, punctures, uneven wear, and any sign that one corner is carrying a mismatched size or aging differently than the others. A collector or hobby car can deteriorate while parked, so calendar time matters just as much as mileage.

A good routine is to inspect the Isuzu I-Mark every time it is prepared for a drive, then perform a more thorough check at seasonal intervals. If the car has recently been acquired, has sat for years, or still wears older tires of uncertain age, a professional inspection is a smart first step before using it on the road.

Tires on an Isuzu I-Mark should be replaced when age, cracking, hardening, impact damage, puncture history, or structural concerns outweigh the remaining tread depth. Collector cars often wear tires that look visually acceptable but have aged out from time, heat cycles, or long stationary periods. Tread alone is not a reliable indicator of serviceability on a low-mileage hobby car.

The practical rule for an Isuzu I-Mark is to treat visible age-related deterioration or uncertain tire history as a reason for closer evaluation and likely replacement. If the car still carries old tires from a prior ownership period, replacing them with the correct modern radial size is usually the better path for dependable road use, even if the tread appears lightly worn.

The Isuzu I-Mark used multiple tire sizes during its 1983 through 1989 production run, including 155R13, 175/70R13, 205/60R14, 185/60R14, and 155/80R13 depending on year and configuration. The available series are all radial designs, with blackwall choices across several sizes and whitewall options in 155/80R13. There is no single universal original tire specification for every Isuzu I-Mark.

For a restoration-minded Isuzu I-Mark owner, originality depends on matching the tire to the specific year, wheel diameter, and intended presentation of the car. Factory literature, surviving original examples, and marque references are the right tie-breakers when more than one size appears within the same model year.

Correct tire fitment can affect how an Isuzu I-Mark is judged, presented, and valued because tire size, sidewall style, and overall stance are part of the car's visual accuracy. A 13-inch whitewall tire gives a different impression than a blackwall 14-inch radial, and the late production years include both possibilities. Judges and knowledgeable enthusiasts often notice when wheel diameter or tire proportions are out of step with the intended configuration.

That does not mean every Isuzu I-Mark needs the same tire to be respected, but it does mean the chosen fitment should match the restoration goal. A factory-style restoration usually benefits from research into the specific year and wheel package, while a custom presentation should still preserve safe, coherent sizing.

The Isuzu I-Mark tire range includes blackwall, narrow whitewall, and wide whitewall styles, but the most era-consistent look for an 1980s compact is typically blackwall. Whitewall options are available in 155/80R13 and may suit a personalized, lowrider-inspired, or period-accessory presentation more than a strictly factory-style restoration. Sidewall correctness therefore depends on the restoration goal as much as the tire size itself.

An owner restoring an Isuzu I-Mark to stock appearance should first verify the proper size and wheel diameter, then choose the sidewall style that best matches surviving reference photos and trim level character. If the car is being built for a customized period look, the available whitewall choices offer more visual flexibility without changing rim diameter.

The listed Isuzu I-Mark tire options are modern radial tires in passenger-car sizes, which makes them fundamentally more practical for normal road use than period bias-ply collector tires used on much older vehicles. Safety still depends on choosing the exact correct size for the car's wheel diameter, keeping the tires in sound condition, and making sure the car itself is mechanically roadworthy. A mismatched 13-inch versus 14-inch fitment is an immediate non-starter.

For public-road use, an Isuzu I-Mark should be treated like any older collector car: verify tire age and condition, inspect the brakes and suspension, and make sure all four tires are appropriate for the application. The tire choice helps, but the whole car has to be ready before regular driving resumes.

Before driving an Isuzu I-Mark, check that all four tires match the intended size, that inflation is correct, and that the rim diameter on the car agrees with the tire code. Inspect for sidewall cracking, uneven wear, puncture repairs, vibration-related issues, and any sign that the car is running mixed fitments from different wheel packages. On later cars especially, confirm whether the car is supposed to be on 13-inch or 14-inch wheels.

Once the tires are verified, give the rest of the Isuzu I-Mark a quick road-readiness review including brakes, steering response, wheel fasteners, and fluid condition. Many problems on older cars show up after storage, so a slow initial test drive close to home is wiser than heading straight into extended highway use.

Appropriate speed for an Isuzu I-Mark depends on the exact tire fitted, its age, and its condition rather than the model name alone. The listed sizes are radial passenger-car tires, but no older car should be driven at modern traffic speeds unless the tires are fresh enough, correctly inflated, and structurally sound. A worn or aged tire can become the limiting factor long before the nominal capability of the size itself.

The sensible approach with an Isuzu I-Mark is to build speed gradually after verifying the tires and the car as a whole. If the tires are newly fitted and the suspension and alignment are sorted, normal secondary-road use is reasonable, but sustained high-speed driving is best reserved for a car whose condition has been carefully evaluated.