The 1987 Isuzu I-Mark came from a period when compact imports were balancing economy-minded packaging with sharper trim-level distinctions, and that matters when it is time to sort out tires. On this model, tire fitment is not one-size-fits-all, because the Base and S use 175/70R13 radials while the RS Turbo steps up to 205/60R14 radials. That makes sub-model identification and wheel diameter the first decisions before comparing tire choices. Current product coverage here centers on the 175/70R13 size, including an Avon CR6ZZ blackwall radial. For an owner focused on road use, appearance, or a careful refresh, matching the exact trim and wheel setup is the key starting point.
Which Tire Size Is Right for The 1987 Isuzu I-Mark
The 1987 Isuzu I-Mark uses two different tire sizes, and they are tied to specific sub-models and different wheel diameters. The first step is confirming whether the car is a Base, S, or RS Turbo, then verifying whether it carries 13-inch or 14-inch wheels before choosing a tire. Once that is settled, the decision shifts to the right radial size and the available product options within that fitment.
A 175/70R13 tire is a metric radial size with a 175-millimeter nominal section width, a 70-series aspect ratio, and fitment for a 13-inch rim. On the 1987 Isuzu I-Mark, this is the radial fitment used on the Base and S sub-models, making it the standard size for those versions rather than the RS Turbo. Available choices in this size include the Avon CR6ZZ with a blackwall sidewall and CR6ZZ series construction. This size is the right place to start when the car retains its original 13-inch wheel setup and a stock-style fitment approach is the goal.
A 205/60R14 tire is a metric radial size with a 205-millimeter nominal section width, a 60-series profile, and a 14-inch rim diameter. On the 1987 Isuzu I-Mark, this size belongs to the RS Turbo, so it should not be assumed to apply across the rest of the model line. Its lower-profile metric format gives it a different fitment role than the 175/70R13 used on Base and S models. This is the size to evaluate only after confirming the car is an RS Turbo and still uses the correct 14-inch wheel configuration.
Tire fitment on the 1987 Isuzu I-Mark varies by sub-model rather than staying uniform across the range. Checking whether the car is a Base, S, or RS Turbo matters because the tire size and wheel diameter are not the same on every version.
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1987 Isuzu I-Mark Base
The 1987 Isuzu I-Mark Base uses the 175/70R13 radial fitment. That makes wheel confirmation straightforward on a stock car, and the main selection questions become choosing the right tire within that size and confirming the 13-inch wheel setup has not been changed over time.
The 1987 Isuzu I-Mark RS Turbo uses a different radial tire size than the Base and S models, so trim identification is especially important here. Tire selection starts with confirming the 14-inch wheel setup, then focusing only on products and specifications that match the RS Turbo fitment.
The 1987 Isuzu I-Mark S shares the 175/70R13 radial size with the Base model. That means the fitment path is simpler as long as the car still carries its original-style 13-inch wheels, after which the buyer can compare tire construction details, sidewall style, and overall product character.
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 1987 Isuzu I-Mark Tires for Sale
Current product coverage for the 1987 Isuzu I-Mark centers on 175/70R13, where the available option is an Avon CR6ZZ radial in blackwall form. That gives Base and S owners a focused metric-radial choice to compare against their wheel width and intended use.
These FAQs focus on the exact tire sizes used on the 1987 Isuzu I-Mark, how fitment changes by sub-model, and what to check when comparing wheel size, product choice, and road-use readiness.
Tire Size & Fitment
What tire size fits a 1987 Isuzu I-Mark?
The 1987 Isuzu I-Mark uses two tire sizes, depending on sub-model. The Base and S use 175/70R13 radials, while the RS Turbo uses 205/60R14 radials. Both are modern metric radial formats, but they are not interchangeable choices across the full I-Mark range because they are tied to different trims and wheel diameters.
Sub-model identification should come before tire shopping on this car. A Base or S with 13-inch wheels needs a different fitment path than an RS Turbo with 14-inch wheels, so it helps to confirm the trim, check the actual wheel diameter on the car, and account for any aftermarket wheel changes before choosing a replacement tire.
What size rim does a 1987 Isuzu I-Mark use?
The 1987 Isuzu I-Mark uses either a 13-inch or 14-inch rim, depending on sub-model. The 175/70R13 fitment uses a 13-inch rim, and the 205/60R14 fitment uses a 14-inch rim. Rim diameter is built into the tire size itself, so matching that number is one of the most important parts of selecting the correct tire.
Wheel diameter should be verified on the car rather than assumed from the model name alone, especially on an older vehicle that may have seen wheel swaps. Once the rim diameter is confirmed, the next checks are wheel width, tire clearance, and whether the tire size matches the specific Base, S, or RS Turbo configuration.
Do all 1987 Isuzu I-Mark sub-models use the same tire size?
No, the 1987 Isuzu I-Mark sub-models do not all use the same tire size. The Base and S share 175/70R13 radial tires, while the RS Turbo uses 205/60R14 radial tires. That means there is a clear split in fitment within the I-Mark lineup, and the RS Turbo should be treated as a separate tire-sizing case.
This difference matters because the two sizes also use different rim diameters. A buyer looking at tire options should confirm both the trim and the actual wheels on the car before comparing products, since a tire that is correct for a Base or S will not serve the same fitment role as the RS Turbo size.
Choosing the Right Tire
What should I consider when choosing a tire for a 1987 Isuzu I-Mark?
Start with the correct size for the exact sub-model. A 1987 Isuzu I-Mark Base or S uses 175/70R13, while the RS Turbo uses 205/60R14, so the first decision is always trim and wheel diameter rather than brand or tread style. Construction is straightforward here because the primary fitments are radial tires.
After size is confirmed, compare the tire's intended use, wheel compatibility, and appearance. On the currently covered 175/70R13 fitment, the available option is an Avon CR6ZZ blackwall radial, so a Base or S owner should check wheel width, road-use expectations, and whether that presentation suits the car's overall look and setup.
What sidewall styles are available for 1987 Isuzu I-Mark tires?
The currently covered 175/70R13 tire for the 1987 Isuzu I-Mark is offered with a blackwall sidewall. That applies to the Avon CR6ZZ option associated with the Base and S fitment. A blackwall presentation keeps the look clean and understated, which suits many later compact cars without pushing the appearance toward a more overt vintage style.
Sidewall style should be treated as an appearance choice after the correct size has been confirmed. On an I-Mark, that means sorting out whether the car uses the 13-inch Base and S fitment or the 14-inch RS Turbo fitment first, then selecting a tire whose sidewall treatment matches the look the owner wants to preserve.
What brands offer tires for the 1987 Isuzu I-Mark?
Current product coverage for the 1987 Isuzu I-Mark includes Avon in the 175/70R13 size. That option is the Avon CR6ZZ radial, which applies to the Base and S sub-model fitment. Brand choice is only meaningful after the correct tire size is confirmed, since a name alone does not override the vehicle's required diameter and overall fitment category.
A useful brand comparison on this car starts with the specific sub-model and wheel size. Base and S owners can evaluate the Avon offering against their 13-inch wheel setup, while RS Turbo owners should first make sure they are shopping within the 205/60R14 fitment path rather than assuming every I-Mark uses the same product range.
Restoration & Appearance
Which tire should I choose for a period-style 1987 Isuzu I-Mark?
A period-style choice for a 1987 Isuzu I-Mark begins with keeping the correct sub-model size intact. The Base and S use 175/70R13 radials, while the RS Turbo uses 205/60R14 radials, so the first restoration-minded step is preserving the proper diameter and profile relationship for the trim level you have rather than treating all I-Marks the same.
Once the fitment is right, appearance details can follow. A blackwall radial such as the available Avon CR6ZZ suits the later-1980s character of the car without forcing a more vintage look, but owners pursuing exact originality should still compare against model-specific literature, photos, or marque guidance before making a final restoration decision.
Does correct tire fitment matter for a 1987 Isuzu I-Mark restoration?
Yes, correct tire fitment matters on a 1987 Isuzu I-Mark restoration because the model range does not use one universal size. Base and S cars use 175/70R13, while the RS Turbo uses 205/60R14, and that difference affects wheel diameter, tire proportions, and the overall visual stance of the car when viewed as a finished restoration.
Using the wrong size can change more than appearance, especially if the wheel diameter no longer matches the tire. A restoration-oriented buyer should verify the exact sub-model, confirm the wheels actually on the vehicle, and choose a tire that supports the intended presentation without assuming another I-Mark trim used the same fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1987 Isuzu I-Mark?
Yes, modifications can affect tire fitment on a 1987 Isuzu I-Mark. Wheel swaps, suspension changes, altered ride height, and body or fender work can all change how a tire sits in the wheel opening, even when the car originally used 175/70R13 or 205/60R14. That is especially important on a model with both 13-inch and 14-inch factory fitment paths.
An older compact car may no longer carry its original wheel package, so checking the vehicle in person matters. Measure the installed wheel diameter, verify wheel width, and look at steering and fender clearance before ordering tires, particularly if the I-Mark has aftermarket wheels or a stance change that could alter usable fitment space.
What should I inspect before driving a 1987 Isuzu I-Mark on new tires?
Before driving a 1987 Isuzu I-Mark on new tires, inspect the wheels for correct diameter and condition, make sure the tires are properly mounted and inflated, and confirm there is no interference at the fenders or suspension. It also helps to check the car's alignment condition, since uneven settings can quickly affect tire wear on a light front-drive compact.
A good road-use check also includes looking at the rest of the car rather than just the tires. Old shocks, worn steering parts, weak bushings, or dragging brakes can make a freshly fitted set feel wrong, so a short inspection and careful first drive help confirm that the tire size, wheel setup, and chassis condition are working together properly.
How often should tires on a 1987 Isuzu I-Mark be inspected?
Tires on a 1987 Isuzu I-Mark should be inspected regularly, especially if the car is driven infrequently or stored for long periods. A visual check for cracking, bulges, cuts, punctures, uneven wear, and air loss is a sensible routine, and older collector-driven compacts deserve extra attention because low annual mileage can hide age-related tire problems.
Inspection should also include the wheel and fitment context. Make sure the car is still running the intended 13-inch or 14-inch setup for its sub-model, and recheck pressure and clearance after seasonal storage or maintenance work. A tire that still has tread can still be a concern if age, damage, or prolonged sitting has affected its condition.
