In 1979, Oldsmobile still spanned a remarkably broad range, from compact and sporty cars to full-size sedans, personal luxury coupes, and family wagons. That breadth matters on a year-make tire page because 1979 Oldsmobile models did not all use the same size, and the lineup mixes both radial and bias-ply fitments depending on the model. Across seven models and thirteen distinct sizes, the real choice can come down to identifying your exact model first, then deciding whether you want an era-correct bias-ply look where applicable or a radial with more familiar road manners. Before choosing a tire, confirm the model name on the car and the wheel diameter it actually carries.
Which Tire Size Is Right for Your 1979 Oldsmobile
1979 Oldsmobile vehicles use thirteen distinct tire sizes, and those sizes vary significantly by model rather than carrying across the whole range. The first decision is identifying the exact model and wheel diameter, since this year includes 13-, 14-, and 15-inch fitments, and some models also cross between bias-ply and radial-era sizing conventions. Understanding that difference before choosing a product saves time and helps match the tire to the right car and wheel.
Year(s): 1979|Fit(s): Custom Cruiser, Ninety-Eight|Construction: Radial|Rim: 15-in rim
HR78-15 is an alphanumeric radial size, with the H-series width/profile code, the R indicating radial construction, and the 15 indicating a 15-inch rim. This size is shared by the 1979 Oldsmobile Custom Cruiser and 1979 Oldsmobile Ninety-Eight. It suits owners who want a radial in the larger full-size Oldsmobile family and should be selected only for those two models rather than across the entire 1979 Oldsmobile range.
Year(s): 1979|Fit(s): Cutlass|Construction: Radial|Rim: 14 in
195/75R14 is a metric radial size that measures 195 millimeters in nominal section width, uses a 75-series aspect ratio, and fits a 14-inch rim. It is available from Coker Classic, Tornel, and Maxxis in wide whitewall and narrow whitewall form, with load ratings ranging from 1,399 pounds at 35 psi to 1,521 pounds at 32 psi. This size is specific to the 1979 Oldsmobile Cutlass and fits buyers aiming for a clean late-1970s radial look with whitewall styling choices.
Year(s): 1979|Fit(s): Cutlass|Construction: Radial|Rim: 14 in
205/70R14 is a metric radial size with a 205-millimeter nominal section width, a 70-series aspect ratio, and a 14-inch rim diameter. It is available from Maxxis and BFGoodrich with narrow whitewall, RWL, dual-redline, and redline sidewall treatments; speed rating varies by product, with one BFGoodrich Radial T/A carrying an S rating to 112 mph. This size is specific to the 1979 Oldsmobile Cutlass and appeals to owners who want a more assertive late-1970s performance-oriented radial appearance.
Year(s): 1979|Fit(s): Cutlass|Construction: Radial|Rim: 14 in
185/75R14 is a metric radial size with a 185-millimeter nominal section width, a 75-series aspect ratio, and a 14-inch rim diameter. It is available from Tornel, Maxxis, and Travelstar in narrow whitewall form, and speed rating varies by product, with Travelstar carrying an S rating to 112 mph; load ratings range from 1,279 pounds at 35 psi to 1,280 pounds at 44 psi. This size is specific to the 1979 Oldsmobile Cutlass and is a sensible choice for owners staying with a narrower radial fitment.
Year(s): 1979|Fit(s): Delta 88|Construction: Radial|Rim: 15-in rim
FR78-15 is an alphanumeric radial size, where the F-series code identifies the size family, the R denotes radial construction, and the 15 indicates a 15-inch rim. This size is specific to the 1979 Oldsmobile Delta 88 rather than universal across the full 1979 Oldsmobile line. It fits buyers restoring or maintaining a full-size Delta 88 on its correct radial-type 15-inch fitment.
Year(s): 1979|Fit(s): Delta 88, Ninety-Eight|Construction: Radial|Rim: 15-in rim
GR78-15 is an alphanumeric radial size with a G-series width/profile code, radial construction signaled by the R, and a 15-inch rim diameter. This size is shared by the 1979 Oldsmobile Delta 88 and 1979 Oldsmobile Ninety-Eight. It is the right direction for owners of those larger Oldsmobile cars who want to stay with a period radial format on a 15-inch wheel.
Year(s): 1979|Fit(s): Omega|Construction: Bias Ply|Rim: 14 in
E78-14 is an alphanumeric bias-ply size, with the E-series code indicating the size family and the 14 identifying a 14-inch rim, while the absence of an R marks it as bias-ply. It is available from Coker Classic and STA in wide whitewall and blackwall form, and tube status varies by product because one STA Traxion is identified as tubeless; load figures reach as high as 1,710 pounds at 60 psi in single-load service on one application. This size is specific to the 1979 Oldsmobile Omega and best suits owners pursuing a traditional bias-ply look where originality and vintage character matter more than radial feel.
Year(s): 1979|Fit(s): Omega|Construction: Radial|Rim: 14-in rim
ER78-14 is an alphanumeric radial size, combining an E-series size code with radial construction and a 14-inch rim diameter. This size is specific to the 1979 Oldsmobile Omega rather than shared across the rest of the 1979 Oldsmobile lineup. It is the Omega choice for owners who want radial construction instead of a bias-ply presentation.
Year(s): 1979|Fit(s): Omega|Construction: Radial|Rim: 14-in rim
FR78-14 is an alphanumeric radial size that uses an F-series code, radial construction, and a 14-inch rim diameter. This size belongs only to the 1979 Oldsmobile Omega within the 1979 Oldsmobile range. It gives Omega owners another radial-era fitment path and should be matched to the specific car and wheel rather than chosen by make and year alone.
Year(s): 1979|Fit(s): Starfire|Construction: Bias Ply|Rim: 13-in rim
A78-13 is an alphanumeric bias-ply size, where the A-series code defines the size family and the 13 indicates a 13-inch rim, with no R because it is not a radial. This size is specific to the 1979 Oldsmobile Starfire. It is the kind of fitment a Starfire owner would choose when preserving a distinctly period small-car bias-ply appearance.
Year(s): 1979|Fit(s): Starfire|Construction: Bias Ply|Rim: 13-in rim
B78-13 is an alphanumeric bias-ply size with a B-series code and a 13-inch rim diameter, and its lack of an R identifies it as bias-ply. This size is specific to the 1979 Oldsmobile Starfire and is not shared with the other 1979 Oldsmobile models. It points toward a restoration-minded Starfire fitment where period style takes precedence over switching to a later radial format.
Year(s): 1979|Fit(s): Starfire|Construction: Radial|Rim: 13-in rim
BR78-13 is an alphanumeric radial size, with the B-series code, an R for radial construction, and a 13-inch rim diameter. This size is specific to the 1979 Oldsmobile Starfire within the model range. It is a good direction for Starfire owners who want to stay with a compact 13-inch fitment while using a radial-format tire.
Year(s): 1979|Fit(s): Starfire|Construction: Radial|Rim: 13-in rim
BR70-13 is an alphanumeric radial size that combines a B-series code with a 70-series profile and a 13-inch rim diameter. This size applies only to the 1979 Oldsmobile Starfire and is one of the more model-specific fitments in the 1979 Oldsmobile family. It suits Starfire owners comparing compact radial options and should be matched carefully to the exact wheel and intended appearance.
Year(s): 1979|Fit(s): Toronado|Construction: Radial|Rim: 15 in
205/75R15 is a metric radial size with a 205-millimeter nominal section width, a 75-series aspect ratio, and a 15-inch rim diameter. It is available from BFGoodrich, Tornel, and American Classic in wide whitewall, goldline, and narrow whitewall form, with load figures reaching 1,598 pounds at 35 psi on several products. This size is specific to the 1979 Oldsmobile Toronado and gives that front-drive personal luxury coupe several distinctly period sidewall presentations in radial construction.
Seven Oldsmobile model lines are covered for 1979, ranging from compact hatchback and sedan platforms to large sedans, a wagon, and a personal luxury coupe. Tire size does vary by model, and in several cases the construction type varies too, so identifying the exact model matters before narrowing to a specific tire. Select a model below to see model-specific fitment history and the tires that apply to it.
1979 Oldsmobile Custom Cruiser
The Custom Cruiser was Oldsmobile's full-size family wagon, built for comfort, cargo room, and long-distance road use in the traditional American station wagon mold. Its tires mount on 15-inch rims, placing it with Oldsmobile's larger 1979 offerings rather than the compact and intermediate cars.
The Cutlass was one of Oldsmobile's most important late-1970s nameplates, covering personal luxury and mainstream intermediate-duty roles with broad buyer appeal. Its fitments stay on 14-inch rims, but the available sizes vary within the model family, so the exact Cutlass configuration matters when narrowing the choice.
The Delta 88 was a full-size Oldsmobile aimed at buyers who wanted roomy American comfort without stepping all the way into the brand's most upscale flagship territory. Its tires mount on 15-inch rims, and its fitments sit squarely in the large-car radial era.
The Ninety-Eight was Oldsmobile's senior full-size passenger car, known for a more luxurious presentation than the Delta 88 and aimed at traditional premium American buyers. Its tires also mount on 15-inch rims, but it uses larger full-size radial sizes than the smaller Oldsmobile lines.
The Omega filled Oldsmobile's compact-car slot and reflected the industry's late-1970s transition from older sizing conventions toward more modern radial practice. Its tires mount on 14-inch rims, and this is one of the few 1979 Oldsmobile models where buyers may encounter both bias-ply and radial-type fitments.
The Starfire was Oldsmobile's small sporty entry, closely tied to the compact hatchback trend of the era and positioned well below the larger rear-drive cars in the lineup. Its tires mount on 13-inch rims, and it spans both bias-ply and radial-style compact fitments depending on the exact application.
The Toronado remained one of Oldsmobile's signature personal luxury cars, notable for its front-wheel-drive layout and distinctive market position in the American luxury coupe field. Its tire fitment uses a 15-inch rim and stands apart from the rest of the lineup with a single metric radial size.
Associated Tire Sizes:
205/75R15 — radial, personal luxury touring fitment
Thirty-one products are available across five tire sizes for 1979 Oldsmobile vehicles. 195/75R14 has four radial choices from Coker Classic, Tornel, and Maxxis in wide and narrow whitewall; 205/70R14 has four radial choices from Maxxis and BFGoodrich in narrow whitewall, RWL, redline, and dual-redline; 185/75R14 has three radial choices from Tornel, Maxxis, and Travelstar in narrow whitewall; E78-14 has three bias-ply choices from Coker Classic and STA in wide whitewall and blackwall; 205/75R15 has four radial choices from BFGoodrich, Tornel, and American Classic in wide whitewall, goldline, and narrow whitewall. Confirm your size and construction first, since tube status and speed rating can vary within some sizes.
Radial Tires
Coker Classic Star Series | 2.25 Inch Whitewall | 195/75R14
These answers focus on the questions 1979 Oldsmobile owners actually face: which models share sizes, how bias-ply and radial choices affect the Omega and Starfire, what sidewall styles exist for Cutlass and Toronado fitments, and how to care for collector-car tires between drives.
Size Basics & Fitment
What tire sizes fit 1979 Oldsmobile vehicles?
1979 Oldsmobile vehicles use thirteen sizes across seven model lines. Custom Cruiser uses HR78-15; Cutlass uses 195/75R14, 205/70R14, or 185/75R14; Delta 88 uses FR78-15 or GR78-15; Ninety-Eight uses GR78-15 or HR78-15; Omega uses E78-14, ER78-14, or FR78-14; Starfire uses A78-13, B78-13, BR78-13, or BR70-13; and Toronado uses 205/75R15. Rim diameters span 13, 14, and 15 inches, so year and make alone are not enough to choose correctly.
That spread means the first fitment checkpoint is the exact model, followed by the wheel diameter on the car today. Where product coverage is available, 14-inch sizes commonly call for rims in the 4.50- to 7.50-inch range depending on size, while 15-inch metric radial products commonly suit 5.50- to 7.50-inch rims. If your car has changed wheels over the years, verify the actual rim before settling on a tire size.
What does HR78-15 mean on a 1979 Oldsmobile tire?
On a 1979 Oldsmobile, HR78-15 is an alphanumeric radial size. The H identifies the size family, the R means radial construction, and the 15 means the tire fits a 15-inch wheel. Within the 1979 Oldsmobile range, HR78-15 belongs to the Custom Cruiser and Ninety-Eight, both of which are larger full-size models that use 15-inch rims.
That code matters because it is not interchangeable with metric 15-inch sizes or with other alphanumeric sizes simply because the rim diameter matches. Section width and profile family are built into the letter-number code, so the right approach is to confirm the exact model and then compare the actual tire now on the car, the wheel diameter, and the intended driving style before making a final choice.
Do all 1979 Oldsmobile models use the same tire size?
No. 1979 Oldsmobile models vary widely in tire size because the lineup ranged from compact cars to full-size sedans, wagons, and the Toronado luxury coupe. Some sizes are shared by two models, such as GR78-15 for Delta 88 and Ninety-Eight, and HR78-15 for Custom Cruiser and Ninety-Eight, but most sizes are model-specific.
That means a buyer who only knows the car is a 1979 Oldsmobile is still one step short of a useful tire decision. The Starfire alone crosses four different 13-inch fitments, and the Omega mixes bias-ply and radial-era options on 14-inch rims. Identifying the model first prevents choosing a tire that may look similar on paper but belongs to a very different Oldsmobile platform.
Buying the Right Tire
What sidewall styles are available for 1979 Oldsmobile tires?
1979 Oldsmobile tires span a broad sidewall range where product coverage exists. Cutlass metric radials appear in narrow whitewall, wide whitewall, RWL, redline, and dual-redline form depending on size, while Toronado 205/75R15 choices include wide whitewall, narrow whitewall, and goldline. Omega E78-14 bias-ply products appear in wide whitewall and blackwall, which creates a distinctly different presentation from the radial whitewall options used elsewhere in the lineup.
For a late-1970s Oldsmobile, sidewall style often shapes the car's visual character almost as much as the wheel cover or trim level. Full-size luxury cars and personal luxury coupes often look most natural with whitewall treatments, while performance-leaning Cutlass applications may suit RWL or redline styling. The right choice depends on whether your goal is factory-style presentation, period customization, or simply a look that matches the car's personality.
What brands make tires for 1979 Oldsmobile vehicles?
1979 Oldsmobile fitments are available from several vintage and specialty tire brands. 195/75R14 comes from Coker Classic, Tornel, and Maxxis; 205/70R14 comes from Maxxis and BFGoodrich; 185/75R14 comes from Tornel, Maxxis, and Travelstar; E78-14 comes from Coker Classic and STA; and 205/75R15 comes from BFGoodrich, Tornel, and American Classic.
Brand choice usually affects the look and character of the tire more than the raw fitment itself. Some brands emphasize traditional whitewall presentation, some lean toward muscle-era styling such as redlines or raised white letters, and others focus on straightforward touring-style radials. Once the correct size is confirmed, comparing brand by sidewall treatment, construction, and load or speed markings is the most useful next step.
Should I choose the E78-14 or a radial size for my 1979 Oldsmobile Omega?
For a 1979 Oldsmobile Omega, E78-14 is the bias-ply option, while ER78-14 and FR78-14 are radial-type fitments. The practical difference is not wheel diameter, since all three mount on 14-inch rims, but construction type and the kind of driving experience you want. Bias-ply maintains a more traditional period presentation, while a radial-format choice aligns with the direction passenger-car tire design had already taken by the late 1970s.
If the Omega is being restored with originality in mind, the bias-ply route may better suit the look and judging expectations for a period-style engine bay and stance. If the car will see more frequent road use, many owners prefer to stay within a radial format. The key is to confirm which size belongs on your exact Omega configuration before deciding between restoration character and a more familiar modern-feeling construction.
Fitting & Setup
What rim width do 1979 Oldsmobile tires require?
Rim width depends on the specific 1979 Oldsmobile tire size. Among sizes with published wheel recommendations, 195/75R14 commonly fits 5.00- to 7.00-inch rims, 205/70R14 fits 5.00- to 7.50-inch rims depending on product, 185/75R14 spans from 4.50- to 7.50-inch rims depending on product, E78-14 fits ranges such as 4.50- to 7.00 or 5.0- to 6.0 inches, and 205/75R15 commonly fits 5.50- to 7.50-inch rims.
Those ranges show why wheel measurement matters even when the size code looks correct. A tire can share the right rim diameter but still be happier on a narrower or wider wheel within the approved range. If the wheels are original, a restoration specialist or factory literature can help confirm width; if the wheels have been changed, measuring the actual rim is the safest way to avoid a mismatch.
Do 1979 Oldsmobile tires require inner tubes?
Inner tube requirements vary by size and sometimes by product on a 1979 Oldsmobile. The E78-14 Omega fitment includes at least one tubeless bias-ply product, so that size does not point to a single tube answer across every tire. The metric radial sizes shown for Cutlass and Toronado do not carry tube-type markings in their size descriptions, which is consistent with tubeless passenger radial practice of the era.
The best approach is to confirm the sidewall marking on the exact tire you plan to use and then match that to the condition and design of the wheel. Tube decisions also depend on whether the wheel itself is suitable for tubeless service. If originality work, older rims, or specialty wheels are involved, checking with the tire maker and a restoration-savvy installer avoids preventable mounting issues.
Can the original 1979 Oldsmobile wheels be used with all tire sizes?
No single original wheel can cover all 1979 Oldsmobile tire sizes because the lineup uses 13-, 14-, and 15-inch rim diameters. A Starfire wheel does not interchange by tire size with a Cutlass or Omega wheel, and a Cutlass 14-inch fitment does not interchange by size with a full-size 15-inch Delta 88, Ninety-Eight, Custom Cruiser, or Toronado application.
Original wheels can often continue in service when the tire size remains within that model's correct diameter and approved width range, but cross-model assumptions are risky on a year with this much variety. Before mounting anything new, verify the wheel diameter stamped on the rim or measure it directly. That simple check prevents mixing a correct-looking tire code with the wrong actual wheel.
Maintenance, Storage & Longevity
How should I store a 1979 Oldsmobile when the tires are fitted?
A stored 1979 Oldsmobile should be kept out of direct sunlight, away from electric motors and other ozone sources, and in a space that stays dry and reasonably temperature-stable. Clean tires last better when road grime, dressings, and chemical residues are kept off the sidewalls. On models that can use bias-ply tires, especially Omega or Starfire applications, long static storage can create more noticeable flat-spotting than on radial-equipped cars.
Rolling the car periodically helps, and many collectors reduce stress on the tires during longer layups by slightly repositioning the car or supporting the vehicle appropriately. Avoid leaving a collector Oldsmobile parked for months with low tire pressure. Good storage habits preserve sidewalls, reduce vibration on the first drive, and help reproduction tires age more gracefully even when annual mileage is very low.
How long do tires on a 1979 Oldsmobile typically last?
On a 1979 Oldsmobile, age matters more than mileage. Collector-car tires should usually be evaluated closely once they reach about five to seven years of age, and many owners treat ten years as the point where replacement deserves serious consideration regardless of remaining tread. The DOT date code on the tire sidewall is the reference point for age, not the date the car was restored.
A low-mileage weekend Oldsmobile can still have tires that are overdue simply because the rubber has hardened or begun to crack with time. Long periods of sitting, heat cycles, and storage conditions all affect service life. If the car has been off the road for several seasons, inspect the tires before returning it to regular use rather than assuming deep tread means the tires are still healthy.
How often should tires on a 1979 Oldsmobile be inspected?
Tires on a 1979 Oldsmobile should be given a quick inspection before every drive and a more thorough check before longer trips or event travel. Look for sidewall cracking, bulges, cuts, irregular wear, and any sign that the tire is losing pressure between outings. On applications that may involve tubes or older-style wheels, valve stems and the area around the bead deserve extra attention.
Routine inspection is especially important on collector cars because they often spend far more time parked than driven. A problem can develop quietly in storage and only become obvious when the car is finally back on the road. Catching a weak valve stem, a cracked sidewall, or a slowly aging spare at home is far better than discovering it after the highway miles have already begun.
Restoration & Authenticity
What tires were originally fitted to the 1979 Oldsmobile Cutlass?
A 1979 Oldsmobile Cutlass belongs to the late 1970s period when passenger-car radial tires had become firmly established, and its fitments here are all radial metric sizes: 195/75R14, 205/70R14, and 185/75R14. That makes radial construction the historically appropriate starting point for most Cutlass restorations. Sidewall treatment can still vary widely, from whitewalls to raised white letters or redlines depending on the look you are trying to recreate.
Factory-correct details can still shift by body style, package, market, and original wheel equipment, so serious restoration work benefits from checking original manuals, window stickers, or marque-club references. The important point is that a Cutlass owner is not deciding between bias-ply and radial in the same way an Omega or Starfire owner might be. The restoration question is usually which radial size and sidewall style best match the specific car.
Does correct tire fitment matter for showing a 1979 Oldsmobile?
Correct tire fitment does matter when showing a 1979 Oldsmobile, especially in classes that reward originality. Judges and knowledgeable enthusiasts often notice size, construction type, and sidewall style immediately because they affect stance, visual proportion, and era correctness. A radial where a bias-ply presentation is expected, or an aggressive modern sidewall treatment on a formal luxury Oldsmobile, can look out of character even if the tire physically fits.
The most accurate choice depends on the model and the standard of the event. A Cutlass may suit a very different sidewall presentation than a Ninety-Eight or Toronado, and a Starfire's compact proportions can be changed noticeably by the wrong profile. For top-level authenticity, use marque-club guidance and period photos to confirm what your exact model and trim should wear before finalizing the tire choice.
What is the difference between BFGoodrich Radial T/A and BFGoodrich Silvertown Radial for a 1979 Oldsmobile Cutlass?
For a 1979 Oldsmobile Cutlass in 205/70R14, BFGoodrich Radial T/A and BFGoodrich Silvertown Radial differ mainly in sidewall presentation and some wheel-range details rather than basic size. Radial T/A uses raised white letters and carries a 93S speed rating, while Silvertown Radial appears in redline and dual-redline form. Radial T/A is paired with a 5.00- to 7.00-inch rim range, while the redline Silvertown versions pair with a 5.50- to 7.50-inch rim range.
That makes the decision more about the character of the car than about whether one is inherently more correct. A sporty Cutlass build may favor the RWL appearance, while a period-custom or muscle-era visual theme may lean toward redlines. Because the approved rim ranges are not identical, wheel width should be verified before choosing purely on looks.
Safety & Road Use
Are 1979 Oldsmobile tires safe for highway driving?
1979 Oldsmobile tires can be appropriate for highway driving when the tire is the correct size, in sound condition, and used within its construction and speed rating limits. Among the sizes with published speed markings here, some 185/75R14 and 205/70R14 products carry an S rating, which corresponds to 112 mph. Many other fitments are reproduction-style collector tires without a speed letter visible in the size description, so the specific product's sidewall marking should be checked before sustained high-speed use.
In real-world collector use, the tire is only one part of the equation. Brake condition, steering components, suspension wear, and alignment on a 1979 Oldsmobile may matter just as much as the tire's theoretical speed ceiling. A well-maintained car on fresh, properly inflated tires is far more confidence-inspiring than one relying on old rubber simply because the tread still looks good.
What inflation pressure should I use for 1979 Oldsmobile tires?
Inflation pressure for a 1979 Oldsmobile depends on the exact tire size and the product selected. Examples include 195/75R14 products rated at 1,399 pounds at 35 psi and 1,521 pounds at 32 psi, 205/70R14 products at 1,433 pounds at 35 psi, 185/75R14 products from 1,279 pounds at 35 psi to 1,280 pounds at 44 psi, E78-14 products reaching 1,400 pounds at 32 psi or 1,710 pounds at 60 psi in single-load service, and 205/75R15 products at 1,598 pounds at 35 psi.
Those figures are load-and-pressure ratings for the tires themselves, not a blanket setting for every 1979 Oldsmobile. Use the original owner's manual or factory placard as the baseline for the car, then compare that with the tire maker's rating for the exact product you are running. Pressure should never be transferred casually from one size to another, especially across such a varied model range.
What should I check before taking a 1979 Oldsmobile on a longer drive?
Before a longer drive in a 1979 Oldsmobile, inspect each tire for cracking, cuts, bulges, uneven wear, and proper inflation, then check that every valve stem is in good condition. If the car uses a tube-related or older-style setup, pay close attention to any slow pressure loss or signs of wheel-seal trouble. The spare should be inspected too, because collector-car spares are often older than the road tires and easily overlooked.
A sound tire inspection should be part of a broader pre-drive review that includes brakes, belts, hoses, fluid levels, lights, and steering feel on a short test drive. Older cars can be mechanically willing but let down by small neglected items. Taking ten minutes to check the tires and the rest of the chassis before departure is one of the best ways to enjoy the trip rather than troubleshoot it roadside.
