1991 Buick Riviera Tires

A 1991 Buick Riviera uses one of two radial tire sizes, depending on the sub-model. The Luxury model uses 205/70R15, while the Luxury w/Gran Touring Pkg. uses 215/65R15. Both are mounted on 15-inch rims, so the main difference is the tire size tied to the specific Riviera configuration.

That means the first step is identifying the exact sub-model rather than assuming every 1991 Riviera used the same tire. If the car has had wheel or suspension changes over the years, it also helps to confirm the actual wheel width and check clearance before selecting between available whitewall, blackwall, redline, OWL, or RWL options.

The 1991 Buick Riviera uses a 15-inch rim with both of its primary tire sizes. That applies whether the car is equipped with 205/70R15 on the Luxury model or 215/65R15 on the Luxury w/Gran Touring Pkg. The tire size changes by sub-model, but the rim diameter remains the same.

Rim diameter is only part of the fitment picture, so it is still worth checking the wheel itself before ordering tires. Width can vary by wheel design or replacement history, and that can affect which tire options are appropriate, especially when comparing sport-oriented sidewall styles against traditional whitewall tires for a restoration-minded Riviera.

The 1991 Buick Riviera has more than one tire size because fitment changes with the sub-model. The standard Luxury model uses 205/70R15, while the Luxury w/Gran Touring Pkg. uses 215/65R15. Both are radial tires for 15-inch rims, but they are tied to different Riviera configurations.

That variation matters because tire selection should follow the actual package on the car, not just the year and model name. A Riviera that has been modified, repainted, or had wheels swapped can be easy to misidentify, so checking the sub-model and the wheel setup first helps avoid choosing a tire with the wrong intended fitment or appearance.

Start with the correct primary size for the specific car: 205/70R15 for the Luxury model or 215/65R15 for the Luxury w/Gran Touring Pkg. From there, compare construction, sidewall style, rim-width compatibility where stated, load figures where relevant, and the overall character of the tire series offered in that size.

A Riviera aimed at a softer, more traditional presentation may call for a narrow or wide whitewall, while a Gran Touring car may suit OWL, RWL, redline, or blackwall styling better. It also helps to think about how the car is used, whether that means weekend cruising, a restoration-oriented display car, or regular fair-weather road use.

Sidewall choices for the 1991 Buick Riviera vary by tire size. In 205/70R15, available styles include blackwall, narrow whitewall, and wide whitewall. In 215/65R15, available styles include OWL, RWL, redline, and wide whitewall, giving the Gran Touring package a distinctly different appearance range from the standard Luxury model.

That choice affects the Riviera's overall presentation more than many buyers expect. Whitewalls tend to reinforce the car's personal-luxury look, while blackwall, raised white letter, and redline options create a more assertive visual tone. The right selection depends on the exact sub-model, the wheel style on the car, and whether the goal is a more formal or sport-oriented finish.

Brands available for the 1991 Buick Riviera include Maxxis, Michelin, Avon, American Classic, Coker Classic, Dunlop, Tornel, Travelstar, Goodyear, Cooper, and BFGoodrich. The exact brand selection depends on whether the car uses 205/70R15 or 215/65R15, since the two sub-model fitments have different product assortments.

Brand alone should not drive the decision. It is more useful to compare each tire within the correct size by sidewall style, tire series, construction details, and wheel compatibility. On this Riviera, the better question is usually whether the tire matches the car's intended look and setup rather than simply choosing by name on the sidewall.

A period-style 1991 Buick Riviera tire choice starts with the correct sub-model size. The Luxury model uses 205/70R15, where narrow and wide whitewall options are available alongside blackwalls. The Luxury w/Gran Touring Pkg. uses 215/65R15, where wide whitewall, redline, OWL, and RWL choices create a different visual direction.

The most appropriate look depends on how the car is being presented. A formal restoration-oriented Riviera often leans toward whitewall styling, while a more performance-flavored Gran Touring example may suit raised white letter or redline sidewalls. For exact originality, period photos, build paperwork, and marque-specific references are still worth checking before settling on one appearance treatment.

On the 1991 Buick Riviera, the primary fitment is radial, so the construction itself already matches the era of the car more naturally than a vintage-style bias-ply tire would. Appearance differences come less from changing construction and more from the sidewall treatment, brand character, and the tire series available in the correct size.

That gives a restored Riviera a fairly broad appearance range even while staying within proper radial fitment. A wide whitewall can emphasize the Buick's luxury-coupe personality, while blackwall, OWL, RWL, or redline options can move the look toward a more athletic late-model presentation. Matching the tire's visual tone to the wheel design helps the finished car look intentional.

Yes, modifications can affect tire fitment on a 1991 Buick Riviera even when the car retains one of its original 15-inch rim diameters. Aftermarket wheels, replacement suspension parts, lowering changes, or body and brake updates can alter the space available for a 205/70R15 or 215/65R15 tire and change which wheel widths are workable.

That is why the actual car should be checked before assuming the original sub-model fitment still applies without question. Wheel width, backspacing, steering clearance, and fender clearance all matter once a Riviera has been changed from stock. A close visual inspection with the wheels turned and the suspension settled can prevent expensive mistakes.

Before driving a 1991 Buick Riviera on new tires, inspect the wheels for damage, confirm the rim diameter and width, and make sure the installed tire size matches the correct sub-model. It also helps to look over valve stems, wheel hardware, and the general condition of suspension and steering components that influence how the tire sits and tracks.

Collector-era cars can hide age-related issues even when the tread looks fine. A careful check for alignment problems, rubbing marks, uneven wear, and air pressure consistency gives a much clearer picture before the car sees regular road use. After the first few drives, rechecking pressure and looking for any fresh contact marks is a sensible follow-up step.

Tires on a collector 1991 Buick Riviera should be maintained with regular pressure checks, visual inspections, and attention to age as well as tread depth. Radial tires that spend long periods parked can still develop cracking, flat spotting, or air loss over time, especially if the car sits in heat, sunlight, or damp conditions.

Routine care is especially important on a low-mileage Riviera that may look road-ready but is driven only occasionally. Clean storage, periodic movement of the car, and checking for sidewall cuts, bulges, or unusual wear help preserve both safety and appearance. Before any longer outing, it is wise to inspect all four tires and the spare rather than only the visible tread.