The 1991 Buick Regal came at the end of Buick’s front-wheel-drive coupe and sedan era, when comfort, clean styling, and trim-level variety shaped the car more than overt nostalgia. That matters for tire selection, because this Regal uses three different radial sizes depending on the sub-model and wheel package: 205/70R14, 205/70R15, or 225/60R16. The available choices range from traditional whitewall presentations to blackwall, redline, dual redline, pin-white-stripe, raised yellow letter, and bias-look radial styles across several well-known series. The right choice comes down to confirming the exact sub-model and wheel diameter first, then matching the tire’s appearance and road-use character to the car you own.
Which Tire Size Is Right for The 1991 Buick Regal
Three tire sizes apply to the 1991 Buick Regal, and the first step is confirming both the exact sub-model and the wheel diameter on the car. Custom and Limited models use either 205/70R14 or 205/70R15, while Gran Sport versions use 225/60R16. Since all three are radial sizes on different rim diameters, tire selection starts with the actual wheel setup before comparing sidewall style, series, or period-inspired appearance.
205/70R14 is a metric radial size in which 205 identifies the nominal section width in millimeters, 70 is the aspect ratio, R indicates radial construction, and 14 is the wheel diameter in inches. On the 1991 Buick Regal, this size serves certain Custom and Limited configurations and keeps the car in a fully radial fitment. Available choices include blackwall, narrow whitewall, redline, and dual-redline treatments from Maxxis, BFGoodrich, and Michelin. It is the size to evaluate when your Regal has 14-inch wheels and you want to balance proper fitment with a specific visual style.
205/70R15 uses the same 205-millimeter section width and 70-series profile as the 14-inch version, but it is built for a 15-inch wheel. This radial size appears on certain 1991 Buick Regal Custom and Limited applications, so it is important to confirm the car’s actual wheel diameter before selecting a tire. The range here is broad, with blackwall, narrow whitewall, wide whitewall, and bias-look radial choices from brands such as Maxxis, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, and Travelstar. It is the right size to review when the car has 15-inch wheels and appearance choice matters as much as fitment.
Fit(s): Gran Sport and Gran Sport w/Towing Suspension
Construction: Radial|Rim: 16 in
225/60R16 is a metric radial size with a wider 225-millimeter section width, a 60-series profile, and a 16-inch wheel diameter. On the 1991 Buick Regal, this size belongs to the Gran Sport and Gran Sport w/Towing Suspension models, making it distinct from the 14-inch and 15-inch fitments used elsewhere in the line. Product choices include raised yellow letter, redline, pin-white-stripe, wide whitewall, and narrow whitewall options from Goodyear, BFGoodrich, and Travelstar. This is the size to focus on when preserving the Gran Sport’s specific wheel-and-tire character rather than adapting one of the smaller Regal fitments.
Sub-model fitment matters on the 1991 Buick Regal because tire size changes with both trim and wheel package. Custom and Limited models share the 205/70R14 and 205/70R15 fitments, while Gran Sport versions move to 225/60R16, so identifying the exact model and wheel diameter comes before choosing a tire style.
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1991 Buick Regal Custom
The 1991 Buick Regal Custom uses either 205/70R14 or 205/70R15, both in radial construction. Tire selection starts with confirming whether the car carries 14-inch or 15-inch wheels, then narrowing the choice by sidewall style, brand, and the kind of traditional or sport-oriented appearance you want.
The 1991 Buick Regal Gran Sport uses 225/60R16 radial tires. That makes the decision more focused: confirm the 16-inch wheel setup, then compare the available sidewall treatments and tire series that best match the car’s intended appearance and driving use.
The 1991 Buick Regal Gran Sport w/Towing Suspension also uses 225/60R16 radial tires. Tire selection centers on keeping the correct 16-inch fitment in place while comparing available sidewall styles and checking wheel width and clearance before choosing a replacement.
The 1991 Buick Regal Limited uses either 205/70R14 or 205/70R15 in radial construction. The practical step is to verify the wheel diameter on the car first, then decide whether a narrow whitewall, wide whitewall, blackwall, or redline-style presentation best suits the Regal’s 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 1991 Buick Regal Tires for Sale
Available 1991 Buick Regal tires cover all three primary radial sizes and include choices from Maxxis, BFGoodrich, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, Travelstar, and Goodyear. Depending on size, buyers can compare blackwall, narrow whitewall, wide whitewall, redline, dual-redline, pin-white-stripe, raised yellow letter, and bias-look radial presentations.
Common 1991 Buick Regal tire questions usually come down to identifying the correct size by sub-model and wheel diameter, then comparing sidewall style, radial construction, and product choices. Fitment checks, maintenance, and the effect of wheel or suspension changes also matter on these cars.
Tire Size & Fitment
What tire size fits a 1991 Buick Regal?
A 1991 Buick Regal uses one of three radial tire sizes: 205/70R14, 205/70R15, or 225/60R16. Custom and Limited models use either 205/70R14 or 205/70R15, while the Gran Sport and Gran Sport w/Towing Suspension use 225/60R16.
The practical step is to verify the exact sub-model and the wheel diameter currently on the car before ordering tires. Two Custom and Limited cars may not use the same size if their wheel packages differ, and a Gran Sport should stay matched to its 16-inch setup unless the entire wheel-and-tire combination has been changed and carefully checked.
What size rim does a 1991 Buick Regal use?
The 1991 Buick Regal uses 14-inch, 15-inch, or 16-inch rims depending on the sub-model and tire size. A 205/70R14 tire belongs on a 14-inch rim, a 205/70R15 tire belongs on a 15-inch rim, and a 225/60R16 tire belongs on a 16-inch rim.
Rim diameter is the first thing to confirm because tires cannot be mounted across different wheel diameters. After that, wheel width also deserves attention, especially if the Regal has aftermarket wheels or has been changed from its original setup. Matching the tire size to the actual wheel on the car avoids wasted time and helps protect clearance and handling.
Why does the 1991 Buick Regal have more than one tire size?
The 1991 Buick Regal has more than one tire size because the fitment changes by sub-model and wheel package. Custom and Limited versions use either 205/70R14 or 205/70R15, while Gran Sport versions use the larger 225/60R16 radial size.
That means tire choice is not just a year-make-model question. A Regal owner should confirm the trim level, then inspect the wheels actually on the car, since many older vehicles have had replacements over the years. Once the wheel diameter is verified, it becomes much easier to compare the right radial options and choose a sidewall style that fits the look of the car.
Choosing the Right Tire
What should I consider when choosing a 1991 Buick Regal tire?
Start with the correct size for the car’s exact setup: 205/70R14, 205/70R15, or 225/60R16. From there, compare radial construction details that matter to you, such as sidewall style, tire series, brand, and wheel-width compatibility for the size you need.
A Regal being kept in a more traditional presentation may lean toward whitewall or redline styling, while a sportier look may point to blackwall, raised white letter, or raised yellow letter options where available. It also helps to check load figures and wheel-width recommendations within that size so the tire matches both the wheel and the car’s intended road use.
What sidewall styles are available for 1991 Buick Regal tires?
1991 Buick Regal tires are available in several sidewall styles, depending on size. The choices include blackwall, narrow whitewall, wide whitewall, redline, dual-redline, pin-white-stripe, raised white letter, and raised yellow letter.
The best choice depends on which tire size the Regal uses and the appearance you want the car to carry. A Custom or Limited may suit a whitewall or redline-style presentation, while a Gran Sport owner may be drawn to a more aggressive lettered or stripe treatment. Sidewall style should always be chosen after the correct size and wheel diameter are confirmed.
What brands offer tires for the 1991 Buick Regal?
Tires for the 1991 Buick Regal are available from Maxxis, BFGoodrich, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, Travelstar, and Goodyear. Brand availability changes with the tire size, so the selection for 205/70R14 is different from 205/70R15 or 225/60R16.
Brand comparison works best after the correct size is established. Once that is settled, the meaningful differences usually come from series character, sidewall treatment, rim-width compatibility, and overall presentation rather than the brand name alone. A Regal owner shopping for a quieter stock-style look may prioritize different details than one building a more performance-oriented or period-inspired appearance.
Restoration & Appearance
Which tire should I choose for a period-style 1991 Buick Regal?
A period-style 1991 Buick Regal should begin with the correct radial size for the exact sub-model and wheel diameter, then move to a sidewall treatment that matches the car’s character. Depending on size, that can include narrow whitewall, wide whitewall, blackwall, redline, dual-redline, pin-white-stripe, or lettered options.
The right visual choice depends on whether the car is being presented as a conservative personal car, a sharper sport-oriented Regal, or a custom restoration. Exact originality questions go beyond size alone, so owners pursuing highly accurate presentation should compare the tire choice against marque references, original photos, or other vehicle-specific historical material before making a final decision.
How does tire construction affect the appearance of a restored 1991 Buick Regal?
On a restored 1991 Buick Regal, construction affects appearance less through overall type than through how the tire is styled, since the primary fitments are radial. The visual difference usually comes from sidewall design, with options ranging from blackwall and whitewall treatments to redline, pin stripe, or lettered presentations.
A tire that looks right on a Custom or Limited may feel out of place on a Gran Sport, even when the size is correct for that car. Paying attention to wheel diameter, sidewall treatment, and tire series helps preserve the Regal’s intended personality. The goal is a tire that supports the car’s era and trim character without forcing an obviously mismatched look.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1991 Buick Regal?
Yes, modifications can affect tire fitment on a 1991 Buick Regal. Aftermarket wheels, wheel-width changes, altered offset, lowered suspension, replacement springs, or brake and body changes can all influence which tire size clears properly, even when the nominal size matches an original Regal fitment.
That matters most when a car no longer carries its original 14-inch, 15-inch, or 16-inch wheel setup. A modified Regal should be checked for steering travel, inner-fender clearance, and suspension clearance before tires are selected. Even within the correct size family, the car’s current wheel and chassis setup determines whether a given tire remains a sensible fitment choice.
What should I inspect before driving a 1991 Buick Regal on new tires?
Before driving a 1991 Buick Regal on new tires, inspect the wheels for the correct diameter and condition, confirm the tires are properly mounted and inflated, and look over the suspension and steering components for looseness or wear. It also helps to verify that each tire clears through a full steering sweep.
Collector and older driver cars often sit for long periods, so road readiness involves more than fresh rubber alone. Check for uneven ride height, rubbing marks, vibration sources, and any air loss after installation. A short local drive followed by another inspection is a smart way to confirm that the new tires and the Regal’s existing chassis condition are working together properly.
How should tires on a collector 1991 Buick Regal be maintained?
Tires on a collector 1991 Buick Regal should be kept at appropriate pressure for the tire in use, inspected regularly for cracking, cuts, bulges, and uneven wear, and checked for slow air loss during storage. Even a lightly driven Regal benefits from routine visual inspection because age and storage conditions matter as much as mileage.
Long-term care also includes protecting the car from prolonged sunlight, moisture, and ozone sources such as electric motors or heaters in enclosed storage areas. Moving the vehicle occasionally helps avoid prolonged flat spotting, and any Regal that has been parked for an extended time deserves a close inspection before a longer trip. Older cars often need that extra step before returning to regular road use.
