1991 Infiniti Tire Fitment Guide

1991 Infiniti vehicles use three distinct tire sizes, and each one is tied to a specific model. The G20 uses 195/60R14 on a 14-inch rim, the M30 uses 215/60R15 on a 15-inch rim, and the Q45 uses 215/65R15 on a 15-inch rim. Rim width guidance appears with the 15-inch sizes: 215/60R15 products span 5.50 to 7.50 inches or 6.00 to 7.50 inches depending on the tire, while 215/65R15 products span 5.50 to 7.50 inches, 6.00 to 7.50 inches, or sit at 6 inches on certain offerings.

The important takeaway is that 1991 Infiniti fitment is model-specific, not shared across the whole brand lineup. A G20 owner should start by confirming the 14-inch wheel and 195/60R14 size, while M30 and Q45 owners should verify which 15-inch profile belongs to their car. If the car has been modified, compare the actual wheel and the tire sidewall before moving ahead.

On a 1991 Infiniti, 195/60R14 is a modern metric radial code. The 195 is the section width in millimeters, 60 is the aspect ratio, R indicates radial construction, and 14 is the wheel diameter in inches. Within the 1991 Infiniti range, this size belongs to the G20 and is paired with a tubeless blackwall Michelin tire in the available selection.

That code matters because it tells you both the tire’s physical proportions and the wheel diameter it must fit. A 195/60R14 cannot substitute for the M30’s 215/60R15 or the Q45’s 215/65R15 without changing wheel diameter and overall tire profile. If you are preserving the G20’s intended stance and handling balance, matching the complete size code is more important than choosing by width number alone.

No. The 1991 Infiniti G20, M30, and Q45 each use a different radial tire size. The G20 uses 195/60R14, the M30 uses 215/60R15, and the Q45 uses 215/65R15. Even where two models share a 15-inch wheel diameter, the tire profile is different, so the fitment is still not interchangeable at the year-and-make level.

That means the first step is always identifying the model, then checking the wheel diameter already on the car. A buyer who starts with only “1991 Infiniti” can easily end up looking at the wrong profile, especially between the M30 and Q45. Once the model is confirmed, sidewall style, brand, and speed rating become the next questions rather than the first ones.

1991 Infiniti tires cover a surprisingly broad range of sidewall appearances depending on model and size. The G20’s 195/60R14 is available in blackwall. The M30’s 215/60R15 expands into blackwall, wide whitewall, redline, and RWL choices, while the Q45’s 215/65R15 is available in OWL, RWL, and redline. That means the visual tone can shift from understated original-style touring appearance to a more personalized period look.

For a factory-leaning early-1990s Infiniti restoration, blackwall is usually the most conservative direction, especially on the G20 and Q45. Whitewall, redline, and raised-letter treatments are more style-driven choices and can suit owners building a custom, boulevard, or nostalgia-inspired presentation. If appearance matters as much as fitment, use the model first and sidewall treatment second when narrowing the field.

Several brands cover the 1991 Infiniti range, but they split by size. Michelin covers 195/60R14 for the G20. American Classic, BFGoodrich, and Dunlop cover 215/60R15 for the M30. Goodyear, Cooper, and BFGoodrich cover 215/65R15 for the Q45. All of these offerings are radial tires, but the brand mix changes as the size changes.

That brand split matters because a buyer may prefer a certain look or period feel, only to find that it belongs to a different model’s size. It is also why 1991 Infiniti shopping works best when size is confirmed first. Once you know whether you need 195/60R14, 215/60R15, or 215/65R15, the realistic brand options become much clearer and easier to compare.

For the 1991 Infiniti M30’s 215/60R15 size, BFGoodrich Radial T/A and Dunlop Sport Classic differ most clearly in sidewall presentation, speed rating, and load figure. The BFGoodrich uses an RWL sidewall, carries a 93S rating, and supports 1,411 pounds at 35 psi. The Dunlop uses a blackwall sidewall, carries a 94V rating, and supports 1,477 pounds. Both are radial 15-inch tires in the correct M30 size.

The practical choice comes down to the character you want from the car. The Radial T/A leans into a more visually assertive raised-letter look, while the Sport Classic keeps a cleaner blackwall appearance and carries the higher speed-rating ceiling. On an M30, that can matter as much for period style as for road-use intent, so compare both the sidewall and the service description rather than shopping by size alone.

Rim width guidance is available for the 15-inch 1991 Infiniti sizes. For 215/60R15 on the M30, compatible ranges run from 5.50 to 7.50 inches or 6.00 to 7.50 inches depending on the tire. For 215/65R15 on the Q45, offerings span 5.50 to 7.50 inches, 6.00 to 7.50 inches, and 6 inches on certain tires. The 195/60R14 G20 tire shown here does not add a rim-width range, so the safe approach is to confirm the actual wheel against the specific tire’s fitment guidance.

Rim width affects sidewall shape and the way the tire sits on the wheel, so it is more than a technical detail. If your 1991 Infiniti still has its original wheels, the correct size usually narrows the fitment quickly. If the car has aftermarket wheels, measure the wheel width before finalizing the tire choice, especially on the M30 and Q45 where multiple sidewall styles are available in the same nominal size.

1991 Infiniti fitments are fundamentally modern radial applications, and the 195/60R14 Michelin tire for the G20 is explicitly marked TL for tubeless use. The 215/60R15 and 215/65R15 offerings are also modern radial designs, but their size markings do not all spell out tube status in the same way on every product. That means tube use should be confirmed against the specific tire marking and the wheel condition rather than assumed from size alone.

On original one-piece late-model luxury car wheels, tubeless operation is usually the baseline expectation when the wheel is sound and the tire is built for it. The better habit is to inspect the wheel bead area, verify valve stem condition, and read the actual sidewall markings before installation. That is especially worthwhile on a 1991 Infiniti that has seen long-term storage, refinished wheels, or wheel changes over the years.

No, not across the whole 1991 Infiniti lineup. The G20 uses a 14-inch tire, while both the M30 and Q45 use 15-inch tires, so wheel diameter alone prevents one universal fitment. Even between the M30 and Q45, both of which mount 15-inch tires, the profile differs: one uses 215/60R15 and the other uses 215/65R15.

Original wheels can still be used successfully when they match the model and correct tire size. The key is treating the wheel-and-tire package as model-specific instead of assuming any 1991 Infiniti wheel can swap across the range. If you are evaluating a used set of original wheels, confirm both diameter and width before trying to pair them with the tire size intended for your particular car.

A stored 1991 Infiniti should be kept away from direct sunlight, standing moisture, and ozone sources such as electric motors, battery chargers, welders, and furnaces. Maintain proper inflation, keep the tires clean, and move the car periodically so one section of the tread is not carrying the load for months at a time. Radial tires generally resist flat-spotting better than older bias-ply designs, but they still benefit from periodic movement during long storage.

If the car will sit for an extended season, consider placing it on tire cradles or stands that relieve some load without letting the suspension hang unnaturally. A breathable car cover and a cool, dry garage help preserve both the rubber and the rest of the vehicle. Storage habits matter on a 1991 Infiniti because a low-mile collector car can age its tires out long before it wears them out.

On a collector-driven 1991 Infiniti, tire life is usually determined more by age than by mileage. A sensible rule is to evaluate tires closely once they reach the five- to seven-year range and to treat ten years as a serious replacement point regardless of remaining tread. The DOT date code on the sidewall is the quickest way to establish the tire’s actual age.

That approach is especially important on cars like the G20, M30, and Q45 because they are often driven occasionally, stored indoors, and can look fine long after the rubber has hardened. A tire with good tread depth but advanced age may still lose wet-weather grip, crack at the sidewall, or become less trustworthy on longer drives. Age should always outrank appearance when judging serviceability.

Tires on a 1991 Infiniti should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, embedded objects, uneven wear, and any sign that the tire is losing pressure. Because these are radial tires used on older luxury cars, it is also smart to inspect valve stems and the bead area regularly, especially if the wheels have been refinished or the car has sat for long periods.

A quick walk-around catches more problems than many owners expect, and it helps separate a safe afternoon drive from a roadside issue. On an older Infiniti, tire inspection should sit alongside checks for brakes, belts, hoses, and fluids rather than being treated as a stand-alone task. If a tire shows age cracking or repeated pressure loss, address it before putting highway miles on the car.

The 1991 Infiniti G20 uses a 195/60R14 radial tire, and radial construction was the normal factory-era standard for a luxury-sport compact of that period. That size places the G20 squarely in the modern metric radial era rather than the older numeric or alphanumeric eras associated with mid-century American cars. A blackwall presentation is the most natural match to the G20’s original-market character.

If you are restoring a G20 for factory-correct appearance, start with the exact size, then look closely at sidewall treatment and overall visual restraint. Market-specific details can vary, especially on imported luxury cars, so owners pursuing top-level originality should compare against period photos, brochures, or marque specialists. Size and construction are the first authenticity filters; sidewall style is the finishing detail.

Yes, correct tire fitment matters on a shown 1991 Infiniti because judges and knowledgeable enthusiasts notice whether the car carries the proper size, the correct radial construction for the era, and an appropriate sidewall appearance. A G20 wearing a 15-inch muscle-car style tire, or a Q45 wearing a profile meant for an M30, would stand out immediately. Even when the wheel diameter is shared, the wrong profile can alter the car’s stance in a way that looks off.

For most show settings, the safest path is to match the exact size tied to the model and choose a sidewall style that suits a premium Japanese luxury car from the early 1990s. Event standards can vary between casual shows and marque-focused judging, so owners aiming for high authenticity should check club guidance and period imagery. Getting the basics right helps the whole restoration look intentional.

For the 1991 Infiniti M30, American Classic offers both wide whitewall and redline versions in 215/60R15. Both are radial tires in the correct size, both use the same 15-inch rim diameter, both support 1,411 pounds at 35 psi, and both fit rim widths from 5.50 to 7.50 inches. The main difference is visual presentation rather than casing type or basic fitment.

That makes the decision an appearance question tied to the kind of M30 you want to present. A whitewall gives the car a more formal, luxury-oriented look, while a redline creates a sportier custom-period flavor. Neither changes the fact that 215/60R15 is the proper M30 size, so the choice comes down to how closely you want to echo factory restraint versus period personalization.

1991 Infiniti tires can be appropriate for highway driving when they are the correct size, in sound condition, properly inflated, and matched to the car’s intended use. The available fitments here are all radial tires, and where speed ratings appear they include S at 112 mph and V at 149 mph. That covers normal U.S. highway use comfortably on paper, assuming the tire is not aged out and the rest of the car is equally roadworthy.

On a 1991 Infiniti, real-world safety usually depends as much on age, maintenance, alignment, suspension condition, and braking system health as on the tire itself. A V-rated tire does not override worn shocks, old brake hoses, or dried-out suspension bushings. Before a highway trip, think of the tire as one part of a full mechanical picture, not as the sole safety margin.

Inflation pressure for a 1991 Infiniti should start with the vehicle manufacturer’s recommendation, then be cross-checked against the tire’s own service limits. Within the available 15-inch sizes, several products show load-and-pressure figures such as 1,411 pounds at 35 psi for 215/60R15, 1,477 pounds for one 215/60R15 Sport Classic, and 1,510 pounds at 35 psi for several 215/65R15 options. Those figures describe the tire’s rated capacity, not a blanket inflation target for every model and every use case.

The best approach is to use the original door-jamb or owner’s-manual recommendation as the baseline for the car, then confirm that the chosen tire’s operating range supports it. Do not transfer a pressure figure from the M30 to the Q45, or from a reproduction-style tire to a different series in the same size. Pressure affects wear, ride quality, and heat buildup, so it deserves model-specific attention.

Before a longer drive in a 1991 Infiniti, inspect each tire for cracking, bulges, sidewall damage, cuts, punctures, uneven wear, and correct cold inflation pressure. Check the valve stems, confirm the spare is usable, and make sure the tires are age-appropriate for the trip you have planned. On cars that have sat often, pressure retention and sidewall condition deserve extra scrutiny even when tread depth still looks strong.

A longer trip also calls for a broader mechanical review because these cars are now firmly in collector territory. Wheel-bearing noise, brake feel, fluid levels, belts, hoses, and cooling-system condition all matter alongside the tires. If the car passes those checks and the tires match the correct model-specific size, a 1991 Infiniti can be a far more relaxed highway companion than its age might suggest.