1981 Buick Tire Fitment Guide

1981 Buick vehicles used nine tire sizes across seven model lines: 185/75R14, 195/75R14, and 205/70R14 for Century; 195/75R14 and 205/70R14 for Regal; 225/75R15 and 215/75R15 for Electra; 225/75R15 for Estate Wagon; 205/75R15 and 215/75R15 for LeSabre; 205/75R15 and GR70-15 for Riviera; and 185/80R13 and 205/70R13 for Skylark. Rim diameters span 13, 14, and 15 inches, so there is no one-size Buick fitment for the 1981 model year.

That means year and make alone are not enough when you start comparing tires. Confirm the exact model first, then confirm the wheel diameter already on the car, and finally compare the rim-width range for the specific size you want to use. A Century or Regal owner can stay within 14-inch sizes, while a Riviera, LeSabre, Electra, or Estate Wagon owner belongs in 15-inch territory, and a Skylark owner needs the 13-inch group.

GR70-15 is an alphanumeric radial size used on the 1981 Buick Riviera. In that older sizing system, the letter-and-number combination identifies the tire's size class and profile family, while the 15 means it mounts on a 15-inch wheel. It differs from a modern metric size such as 205/75R15 because the width is not stated in millimeters right in the code, even though both are radial-type fitments for the same model year.

Riviera owners usually encounter GR70-15 when they want the visual character of an early-1980s premium coupe preserved. Goodyear versions in this size also bring period-style sidewall treatments such as pin white stripe or raised white letters, which can matter just as much as the raw dimensions on a personal luxury car. If your Riviera already wears metric radials, compare wheel width and overall appearance before switching formats.

No. 1981 Buick models split across compact, midsize, full-size, wagon, and personal-luxury platforms, and their tires reflect that spread. Skylark uses 13-inch sizes, Century and Regal use 14-inch sizes, and LeSabre, Electra, Estate Wagon, and Riviera use 15-inch sizes, with several models carrying more than one original-size option within their own line.

That model-by-model variation affects more than appearance. It changes wheel diameter, rim-width compatibility, available sidewall styles, and even whether an alphanumeric period size is part of the picture, as with the Riviera. If you are unsure whether your Buick has been re-wheeled over the years, check the actual tire sidewall and wheel diameter before choosing a replacement, especially on cars that may have passed through several owners.

1981 Buick tires cover a wide visual range. Whitewall choices dominate many Buick sizes, with narrow and wide whitewalls appearing in 185/75R14, 195/75R14, 225/75R15, 215/75R15, 205/75R15, and 185/80R13. Sportier or more specialized sidewalls also appear, including redline, dual redline, raised white letter, goldline, pin white stripe, blackwall, and RBL depending on the size.

For most 1981 Buicks, whitewall radials are the most natural visual fit because Buick still leaned heavily toward comfort and formal styling in this era. A Riviera can also carry more assertive sidewall themes without looking out of place, especially in GR70-15. The right choice depends on whether you want your Buick to read as luxury, sporty personal coupe, or compact commuter, not simply on what will mount on the wheel.

1981 Buick fitments are covered by Tornel, Maxxis, Travelstar, Coker Classic, BFGoodrich, American Classic, Goodyear, and Michelin. Brand coverage varies by size: for example, 185/75R14 comes from Tornel, Maxxis, and Travelstar; 205/70R14 comes from Maxxis and BFGoodrich; GR70-15 is a Goodyear-only fitment; and 205/70R13 is covered by Michelin.

That spread gives Buick owners room to prioritize appearance and period character as much as brand preference. A buyer restoring a Riviera may gravitate toward a Goodyear alphanumeric look, while a Regal owner comparing 205/70R14 choices may focus on whether a whitewall, redline, or raised white letter better matches the car. Once you narrow the size, the brand question becomes much easier to answer in a meaningful way.

Both series are available in GR70-15 for the 1981 Buick Riviera, and both use a bias-look radial construction with a 15-inch rim diameter. GM Custom Tread appears with a pin white stripe and a 7.0- to 8.0-inch rim-width range, while Steelgard appears in both raised white letter and pin white stripe versions, with rim-width figures spanning 7.5 to 8.0 inches or a single 8-inch application depending on the product.

The practical difference is mostly visual and wheel-specific rather than a wholesale change in fitment concept. Riviera owners chasing a very GM-flavored early-1980s presentation may prefer the GM Custom Tread appearance, while Steelgard gives another factory-style sidewall personality in the same size family. Check your actual wheel width before choosing between them, since the accepted rim-width range is not identical across every GR70-15 product.

Rim-width requirements vary by size on 1981 Buick vehicles. 185/75R14 fits wheels from 4.50 to 7.50 inches depending on product, 195/75R14 from 5.00 to 7.00, 205/70R14 from 5.00 to 7.50, 225/75R15 from 6.00 to 8.00, 215/75R15 from 5.5 to 7.5, 205/75R15 from 5.50 to 7.50, GR70-15 from 7.0 to 8.0, 185/80R13 from 5.00 to 6.50, and 205/70R13 from 5.50 to 7.50 inches.

Those ranges are wide enough to cover many original Buick wheels, but not every product within a size accepts the same wheel width. A 205/70R14 redline may call for a slightly different wheel range than another 205/70R14 from a different brand, and GR70-15 products are especially worth checking closely. Measure or confirm the wheel before choosing a tire instead of assuming every tire in the same nominal size fits every original rim equally well.

Most 1981 Buick tires in these sizes are presented as modern radial passenger tires without tube-type markings, and the 205/70VR13 Michelin XDX is explicitly marked TL for tubeless use. None of the other Buick fitments here carry a TT tube-type marking. That points the 1981 Buick range toward tubeless radial service, with the caveat that wheel condition and the exact sidewall marking on the tire should always be checked before final installation.

The important distinction is between the tire's design and the wheel's condition. A clean, sound tubeless wheel can usually stay in tubeless service, while a pitted or damaged original wheel may need further attention before any new radial is fitted. If you are reviving a long-stored Riviera, Electra, or Skylark, include the valve stems and wheel bead seats in the inspection rather than focusing only on the tread and sidewall.

A stored 1981 Buick should be kept out of direct sunlight, away from ozone sources such as electric motors and battery chargers, and on a dry surface rather than bare dirt. Radial tires generally tolerate storage better than older bias-ply designs, but they still age from heat, ultraviolet exposure, and long periods of static loading. Inflation should be maintained during storage so the casing is not left underinflated for months at a time.

Moving the car slightly from time to time helps avoid prolonged pressure on one contact patch, especially on heavier Buicks such as Electra, Estate Wagon, and Riviera. If the car will sit for an extended season, many collectors use tire cradles or stands to reduce stress on the tires and suspension. A breathable indoor cover protects the body, but tire life depends more on climate control, pressure maintenance, and keeping ozone away from the rubber.

Tires on a 1981 Buick should be judged more by age than by mileage. Collector cars often wear tread very slowly, yet the rubber, casing, and sidewall still age over time. A good rule is to begin close evaluation once tires are in the five- to seven-year range and to treat around ten years as the point where replacement deserves serious consideration, even if the tires still look presentable from a distance.

The DOT date code on the sidewall is the best quick reference for age, and it matters on all Buick sizes from 185/80R13 up through 225/75R15. Cars that spend long periods parked can appear to have healthy tread while developing internal age-related issues, small sidewall cracks, or hardening. If your Buick sees occasional tours rather than short local drives, age becomes even more important than visible tread depth when planning replacement.

Tires on a 1981 Buick should be checked before every drive and given a closer inspection before any longer outing. Look for sidewall cracking, weather checking, cuts, bulges, uneven wear, and air-pressure loss. On tubeless applications, pay attention to valve stems and bead-seat sealing as well, especially if the car still uses older wheels that may have seen years of inactivity.

A quick walk-around catches most of the problems that strand hobby cars: a soft tire, a new crack, or a slow leak that was not present on the last drive. A second, more deliberate inspection before a road trip is wise on larger full-size Buicks because their weight places more demand on the tires. Keep a close eye on the spare too, since a decades-old spare is often unusable when you finally need it.

A 1981 Buick Century would have been a radial-era car from new, not a bias-ply application. Within the Century line, 185/75R14, 195/75R14, and 205/70R14 all appear as year-correct fitment paths depending on the specific car. Whitewall radials are especially consistent with how many Buicks of the period were presented, although the exact sidewall treatment could vary by trim, wheel package, and market emphasis.

That means restoration accuracy starts with matching the exact Century configuration rather than assuming every midsize Buick used the same tire. Check original paperwork, surviving window stickers, period photos, or marque-club resources if you are aiming for a highly accurate car. For show use, getting the size family right matters first, then the sidewall style, and only after that does it make sense to compare brand personalities within the available radial choices.

Yes. On a shown 1981 Buick, judges and knowledgeable enthusiasts will notice whether the tire size, construction family, and sidewall treatment fit the model's character and era. A Skylark on a wide whitewall may read very differently from one on a blackwall 205/70R13, and a Riviera on a GR70-15 carries a more period-specific look than the same car on a generic modern sidewall style.

The level of scrutiny depends on the event. A local cruise night may reward clean presentation, while marque judging can be much stricter about width, profile, whitewall proportion, and whether a special alphanumeric size belongs on that model. If you are building for points, use Buick literature and club guidance to confirm what was appropriate for your exact model and presentation rather than choosing solely by visual preference.

In 205/75R15 for the 1981 Buick Riviera, the main difference is sidewall presentation rather than size or basic radial construction. BFGoodrich offers both a wide whitewall Silvertown Radial and a Goldline Silvertown Radial in this fitment, each with the same 15-inch rim diameter and the same 5.50- to 7.50-inch rim-width range. Tornel and American Classic also cover the size in narrow whitewall form.

That makes the decision largely an authenticity and styling question. A whitewall leans toward Buick's traditional luxury identity, while a goldline can push the car toward a more upscale period-custom or specialty look that some owners prefer on personal luxury coupes. If the Riviera is being judged, check event standards and period references first, because sidewall treatment can influence how correct the finished car appears even when the dimensions are right.

Yes, provided the tires are in good condition, properly inflated, and matched to the correct size and wheel. The speed-rated examples here include S-rated tires in 185/75R14, 205/70R14, and 215/75R15, which carry a 112 mph ceiling, and a V-rated Michelin 205/70VR13 for the Skylark, which carries a 149 mph ceiling. Many other 1981 Buick tires do not show a speed letter in the sidewall marking, so the exact product should always be checked individually.

For normal highway use, the age and condition of the Buick often matter more than extreme tire-speed capability. Brakes, steering, suspension bushings, alignment, and cooling-system health all influence whether an older Century, Electra, or Riviera is ready for sustained road speed. If the car has been sitting, treat the tires as one part of a complete roadworthiness inspection rather than the only variable in the safety equation.

Inflation pressure should follow the vehicle recommendation for the Buick model and the operating limits of the tire itself. Among these Buick sizes, maximum load and pressure figures include 1279 to 1290 pounds at 35 to 44 psi for 185/75R14, 1400 to 1521 pounds at 32 to 35 psi for 195/75R14, 1433 pounds at 35 psi for 205/70R14, 1874 to 2094 pounds at 32 to 35 psi for 225/75R15, 1742 to 1874 pounds at 32 to 35 psi for 215/75R15, 1598 pounds at 35 psi for 205/75R15, and 1301 to 1323 pounds at 32 to 35 psi for 185/80R13.

Those figures are not a blanket recommendation to inflate every Buick tire to the maximum on the sidewall. Use the Buick placard or owner's manual as the starting point for normal driving pressure, then verify that the tire you choose supports the vehicle correctly at that setting. Keep front and rear pressures where Buick intended for the model, since ride, steering feel, and tread wear can all change quickly when a full-size or midsize Buick is over- or underinflated.

Before a longer drive in a 1981 Buick, inspect each tire for cracks, cuts, bulges, unusual wear, and proper cold inflation pressure. Check the valve stems, look for signs of slow leakage around the bead area, and make sure the spare is serviceable. If your Buick wears an unusual fitment such as GR70-15 on a Riviera or 205/70VR13 on a Skylark, confirm that the sidewall markings and wheel match what you expect before setting out.

A longer trip also calls for a broader mechanical review because tires are only one part of the equation on a four-decade-old car. Verify wheel-lug torque, brake feel, steering response, shock behavior, and whether the car tracks straight at speed. Full-size Buicks and wagons place more sustained load on their tires, so uneven wear or age cracks that seem minor in the garage can become much more important once the car is carrying passengers and highway heat builds.