1974 American Motors covered a surprisingly broad slice of the market, from compact economy cars like the Gremlin and Hornet to the sporty Javelin and the larger Ambassador and Matador lines. That spread means tire choice for 1974 American Motors is not one-size-fits-all, because five models use twelve different sizes and not every size crosses over from one model to another. Some cars stay within 14-inch fitments, while the Javelin also reaches into a 15-inch performance size, and a few models pair period-style bias-ply options with radial alternatives. The first thing to confirm is your exact model, then whether you want original-style construction or a later radial-style fitment where applicable.
Which Tire Size Is Right for Your 1974 American Motors
Twelve tire sizes appear across 1974 American Motors vehicles, and they vary by model rather than being shared across the full lineup. The real decision starts with identifying your model and wheel diameter first, then deciding whether your car calls for a traditional bias-ply size or one of the radial options used on certain Ambassador, Matador, and Javelin applications. Understanding that split before choosing a product saves time and helps you match the tire to the car you actually own.
Year(s): 1974|Fit(s): Ambassador, Matador|Construction: Bias Ply|Rim: 14 in
F78-14 is an alphanumeric bias-ply size, with F identifying the size class and 14 indicating a 14-inch rim. It is available from Coker Classic with a wide whitewall sidewall style. This size is specific to Ambassador and Matador models, and it suits owners who want a traditional bias-ply look and feel that fits the character of a mid-1970s full-size American car.
Year(s): 1974|Fit(s): Ambassador, Matador|Construction: Bias Ply|Rim: 14 in
G78-14 is an alphanumeric bias-ply size, with G marking the size class and 14 showing the 14-inch rim diameter. It is available from BFGoodrich and Coker Classic in dual-white-stripe, narrow whitewall, and wide whitewall styles. This size is specific to Ambassador and Matador models, and it gives buyers several period-correct sidewall looks for restoration or era-appropriate road use.
Year(s): 1974|Fit(s): Ambassador, Matador|Construction: Bias Ply|Rim: 14 in
H78-14 is an alphanumeric bias-ply size, with H designating the size class and 14 denoting a 14-inch rim. It is available from Coker Classic with a wide whitewall sidewall style. This size is specific to Ambassador and Matador models, and it fits buyers aiming for a substantial full-size appearance with a traditional bias-ply construction.
HR78-14 is an alphanumeric radial size, with the R identifying radial construction and 14 indicating a 14-inch rim. This radial size appears on Ambassador and Matador applications, though no products are shown here under that exact size code. For buyers focused on keeping the car within its later-era radial fitment path, HR78-14 is the model-specific radial reference point to confirm before moving deeper into product selection.
6.45-14 is a numeric bias-ply size in which 6.45 refers to nominal section width and 14 is the rim diameter in inches. This size is specific to the Gremlin, and no products are shown here under that exact size code. It is the kind of compact-car bias-ply sizing that matters most to owners trying to stay close to the Gremlin's original small-car proportions.
C78-14 is an alphanumeric bias-ply size, with C identifying the size class and 14 marking the 14-inch rim diameter. This size is shared by Gremlin and Hornet applications, though no products are shown here under that exact size code. It is a useful reference for buyers comparing compact AMC fitments, especially when sorting out whether their car uses the alphanumeric option or the alternate numeric size.
Year(s): 1974|Fit(s): Gremlin, Hornet|Construction: Bias Ply|Rim: 14 in
695-14 is a numeric bias-ply size, with 6.95 indicating nominal section width and 14 identifying the rim diameter in inches. It is available from BFGoodrich and US Royal in blackwall, dual-redline, and narrow whitewall styles. This size is shared by Gremlin and Hornet models, and it gives compact AMC owners a strong mix of stock-looking sidewalls and sportier period styling cues.
D78-14 is an alphanumeric bias-ply size, with D identifying the size class and 14 denoting a 14-inch rim. This size is specific to the Javelin, and no products are shown here under that exact size code. It serves as one of the Javelin-only fitment references to verify before choosing between the model's several 14-inch and 15-inch performance-oriented options.
Year(s): 1974|Fit(s): Javelin, Matador|Construction: Bias Ply|Rim: 14 in
E78-14 is an alphanumeric bias-ply size, with E marking the size class and 14 indicating a 14-inch rim. It is available from Coker Classic and STA in wide whitewall and blackwall styles, and tubeless construction varies by product. This size is shared by Javelin and Matador models, so buyers should confirm not just the model but also whether they want a passenger-car appearance or a more utilitarian blackwall bias-ply option.
Year(s): 1974|Fit(s): Javelin, Matador|Construction: Bias Ply|Rim: 14 in
F70-14 is an alphanumeric bias-ply size, with F identifying the size class, 70 indicating the lower-profile alphanumeric series, and 14 showing the rim diameter. It is available from Firestone and Goodyear in pin-white-stripe, redline, and RWL styles. This size is shared by Javelin and Matador applications, and it is the clear choice for buyers chasing a strong mid-1970s performance look in a bias-ply construction.
FR78-14 is an alphanumeric radial size, with R indicating radial construction and 14 identifying a 14-inch rim. This radial size appears on Javelin and Matador applications, though no products are shown here under that exact size code. Buyers comparing it to F70-14 should treat FR78-14 as the model-specific radial fitment path and confirm that they are following the correct size for their particular car.
Year(s): 1974|Fit(s): Javelin|Construction: Bias Ply|Rim: 15 in
E60-15 is an alphanumeric bias-ply size, with E marking the size class, 60 indicating a lower-profile alphanumeric series, and 15 denoting a 15-inch rim. It is available from Goodyear with an RWL sidewall style. This size is specific to the Javelin and stands apart from the 14-inch AMC fitments, making wheel diameter confirmation especially important before choosing it.
Five American Motors models are covered for 1974, and tire size varies meaningfully from one model to the next. Compact Gremlin and Hornet fitments differ from the larger Ambassador and Matador choices, while the Javelin spans several sport-oriented 14-inch options and a distinct 15-inch size. Select your model below to narrow the fitment history and see which sizes apply to that specific 1974 American Motors application.
1974 American Motors Ambassador
The Ambassador was AMC's upscale full-size offering, aimed at buyers who wanted traditional American comfort and presence in the final years before the nameplate disappeared. Its tires mount on 14-inch rims, with both bias-ply and radial-era fitments appearing within that larger AMC family.
The Gremlin was AMC's distinctive compact hatchback, known for its short wheelbase proportions and budget-minded, youth-oriented appeal. Its tire fitments stay on 14-inch rims, with both numeric and alphanumeric bias-ply sizing tied to compact-car use.
The Hornet was one of AMC's core compact platforms and came in body styles that balanced practicality with a slightly more conventional look than the Gremlin. Its tires mount on 14-inch rims, using compact bias-ply sizes shared with Gremlin applications.
The Javelin was AMC's sporty pony car, and by 1974 it still carried the styling and stance buyers associate with early-1970s American performance. Javelin fitments span 14-inch and 15-inch rims, which makes wheel diameter especially important before choosing a tire.
The Matador carried AMC through the mid-size segment and, depending on body style, could lean toward family transportation or dramatic personal-luxury styling. Its fitments stay on 14-inch rims but cover a wide spread of full-size, mid-size, and sport-leaning bias-ply choices plus radial alternatives.
Thirty-one products are available across twelve tire sizes for 1974 American Motors vehicles. F78-14, G78-14, H78-14, 695-14, E78-14, F70-14, and E60-15 carry current product coverage from Coker Classic, BFGoodrich, US Royal, STA, Firestone, and Goodyear in bias-ply construction with sidewall styles ranging from blackwall and redline to RWL and wide whitewall.
These FAQs sort out how 1974 American Motors tire sizes change from Gremlin to Ambassador to Javelin, when radial and bias-ply fitments enter the picture, and what sidewall, tube, load, and storage details matter for a collector-driven AMC.
Size Basics & Fitment
What tire sizes fit 1974 American Motors vehicles?
1974 American Motors vehicles use twelve sizes across five model lines: F78-14, G78-14, H78-14, and HR78-14 for Ambassador; 6.45-14, C78-14, and 695-14 for Gremlin; 695-14 and C78-14 for Hornet; D78-14, E78-14, F70-14, FR78-14, and E60-15 for Javelin; and E78-14, F78-14, G78-14, H78-14, HR78-14, F70-14, and FR78-14 for Matador. Most of the range uses 14-inch rims, while E60-15 is the one 15-inch fitment. Rim-width guidance appears on several covered sizes, including 5.00-7.00 inches for F78-14 and G78-14, 5.50-8.00 for H78-14, 5.00-6.00 for 695-14, 4.50-7.00 or 5.0-6.0 for E78-14, 6.00-7.00 for F70-14, and 7 inches for E60-15.
The practical takeaway is that year and make alone are not enough for 1974 American Motors fitment. A Gremlin owner is choosing among compact 14-inch sizes, an Ambassador owner is working within larger 14-inch full-size fitments, and a Javelin owner may need to separate a 14-inch performance tire from a true 15-inch setup. Matching the model first and the wheel diameter second will eliminate most ordering mistakes before you compare brands or sidewall styles.
What does 695-14 mean on a 1974 American Motors tire?
On a 1974 American Motors tire, 695-14 is a numeric bias-ply size. The 6.95 portion refers to the nominal section width in inches, and the 14 identifies the wheel diameter in inches. For 1974 American Motors applications, that size appears on Gremlin and Hornet models, and the covered products fit 14-inch wheels with a 5.00-6.00 inch rim-width range. It is available in classic bias-ply construction from BFGoodrich and US Royal with blackwall, dual-redline, and narrow whitewall sidewall treatments.
That matters because 695-14 reads very differently from a modern metric radial code. If your Hornet or Gremlin still follows an original-style compact bias-ply fitment, 695-14 points you toward the right family of tires and sidewall looks for the era. It is also worth checking the actual tire on the car, because Gremlin and Hornet both also appear with C78-14 in some applications, and those two size systems are not simply different ways of printing the same code.
Do all 1974 American Motors models use the same tire size?
No, 1974 American Motors models do not all use the same tire size. The compact Gremlin and Hornet use smaller 14-inch bias-ply fitments such as 6.45-14, C78-14, and 695-14, while the Ambassador and Matador use larger 14-inch sizes such as F78-14, G78-14, H78-14, and HR78-14. The Javelin adds its own mix of D78-14, E78-14, F70-14, FR78-14, and the 15-inch E60-15. That spread reflects the very different roles those cars played within AMC's lineup.
For a buyer, that means model identification is the first checkpoint, not a finishing detail. A tire that suits a Matador may be completely wrong for a Gremlin, even though both wear 14-inch wheels in many cases. Javelin owners need to be especially careful, because the model spans multiple 14-inch sport sizes and one 15-inch fitment. If the car has changed hands or wheels over the years, compare the current tire code and wheel diameter against the model-specific fitment path before moving on.
Buying the Right Tire
Should I choose the F70-14 or the FR78-14 for my 1974 American Motors?
For a 1974 American Motors application that uses one of those two sizes, the choice is primarily about construction and the exact fitment path for the model. F70-14 is a bias-ply performance size used on Javelin and Matador, while FR78-14 is a radial size also used on Javelin and Matador. F70-14 is available in Firestone and Goodyear offerings with redline, pin-white-stripe, and raised white letter looks. FR78-14 serves as the radial reference size for those same AMC model families.
Choose F70-14 when the goal is a strong mid-1970s performance appearance with the traditional feel and visual stance associated with bias-ply tires. Choose FR78-14 when your car is supposed to follow the radial-size path for that model and wheel setup. The key is not to treat them as interchangeable just because both fit 14-inch wheels. Confirm what your particular Javelin or Matador is equipped to use, then match the construction style to how closely you want the finished car to reflect its original-era tire character.
What sidewall styles are available for 1974 American Motors tires?
1974 American Motors tires cover a wide span of period sidewall styles. G78-14 appears in dual-white-stripe, narrow whitewall, and wide whitewall versions, while 695-14 is available as blackwall, dual-redline, and narrow whitewall. F70-14 brings distinctly sporty pin-white-stripe, redline, and RWL choices, and E60-15 is also available in RWL form. E78-14 crosses between wide whitewall and blackwall, and F78-14 plus H78-14 stay in wide whitewall territory in the covered products.
That variety matters because sidewall style often says as much about the finished car as the size code itself. Whitewalls fit naturally on Ambassador and many Matador or upscale AMC restorations, while blackwalls, redlines, and raised white letters align better with performance-leaning Javelin themes or simpler compact-car presentations. If the goal is authenticity, use photos, factory literature, or marque-club guidance to narrow the exact look your car should wear. If the goal is simply era-appropriate style, the sidewall can be chosen to suit the personality of the model.
What brands make tires for 1974 American Motors vehicles?
Six brands cover 1974 American Motors applications in the available products: Coker Classic, BFGoodrich, US Royal, STA, Firestone, and Goodyear. Coker Classic appears on F78-14, G78-14, H78-14, and E78-14; BFGoodrich covers G78-14 and 695-14; US Royal appears on 695-14; STA appears on E78-14; Firestone appears on F70-14; and Goodyear appears on F70-14 and E60-15. The brand spread also reflects the different personalities of the AMC range, from compact stock-style tires to full-size whitewalls and muscle-era performance bias-ply options.
That means brand choice should follow size and visual goal, not the other way around. If you own an Ambassador and want a classic whitewall look, your path is different from a Javelin owner seeking RWL or redline styling. Some sizes have only one brand and one sidewall treatment, while others open up several period-correct directions. Narrow the model and exact size first, then compare brands within that size for the appearance and construction character that best match your AMC.
Fitting & Setup
What rim width do 1974 American Motors tires require?
Rim-width guidance for 1974 American Motors tires depends on the exact size. F78-14 and G78-14 fit 5.00-7.00 inch rims, H78-14 fits 5.50-8.00 inch rims, 695-14 fits 5.00-6.00 inch rims, E78-14 appears with 4.50-7.00 inch and 5.0-6.0 inch guidance depending on product, F70-14 fits 6.00-7.00 inch rims, and E60-15 fits a 7-inch rim. Those ranges are tied to the individual tire size and product family, not to American Motors as a whole.
That is why wheel measurement matters before you commit to a tire, especially on cars that may have had wheels swapped over the decades. A Javelin with a 7-inch wheel opens different possibilities than a compact AMC still on a narrower factory-type rim. If more than one tire size could plausibly fit your model family, confirm the wheel width and diameter on the actual car first. That step is often the difference between a straightforward installation and a mismatch in stance or mounting suitability.
Do 1974 American Motors tires require inner tubes?
Tube requirements on 1974 American Motors tires vary by size and sometimes by product. E78-14 includes at least one explicitly tubeless option, while another E78-14 product family is presented without a tube marking that resolves the question across the whole size. Other covered sizes such as F78-14, G78-14, H78-14, 695-14, F70-14, and E60-15 do not show a uniform tube-type or tubeless marker across every product name. That makes the correct answer product-specific rather than universal to the entire year and make.
The practical move is to check the exact sidewall marking and the wheel you plan to use together, rather than assuming all reproduction bias-ply tires are mounted the same way. Original wheels, wheel condition, and the tire's own construction all affect whether a tube is appropriate. If your AMC is being restored on stock steel wheels, confirm the recommendation for that exact tire before mounting. That is especially important for a collector car that may sit for long periods and needs dependable air retention.
Can the original 1974 American Motors wheels be used with both or all tire sizes?
Original 1974 American Motors wheels can only be shared across multiple tire sizes when the wheel diameter and width line up with the size you want to use. Most AMC applications here are built around 14-inch tires, so some model-specific sizes share a common rim diameter. Even within the 14-inch group, however, rim-width guidance changes by size: 695-14 favors 5.00-6.00 inch rims, F70-14 uses 6.00-7.00 inch rims, and H78-14 runs as wide as 5.50-8.00 inches. E60-15 stands apart because it requires a 15-inch wheel.
That means diameter compatibility alone is not enough. A Matador owner comparing F78-14 and G78-14 may find both work with the same basic wheel diameter, while a Javelin owner moving between F70-14 and E60-15 is crossing from 14-inch to 15-inch hardware. Before reusing original wheels, verify the stamped wheel size or measure the wheel directly. On restored cars, it is also wise to make sure the wheels have not been changed to a different width or diameter at some point in the car's life.
Maintenance, Storage & Longevity
How should I store a 1974 American Motors when the tires are fitted?
A 1974 American Motors should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, chargers, and other ozone-producing equipment that can age sidewalls. Keep the tires at proper pressure, avoid letting the car sit on damp ground, and move it periodically if practical. Because many AMC fitments here are bias-ply, long stationary storage can encourage temporary flat-spotting more readily than many radials. Cars using the radial-size AMC fitments still benefit from the same basic storage discipline.
If the car will sit for months, rolling it occasionally or placing it on stands to reduce long-term loading can help preserve tire shape. That is especially worthwhile on collector vehicles with fresh restorations or show-quality sidewalls that you want to keep clean and free of stress marks. Tire covers add another layer of protection from light exposure. Good storage habits do not just preserve the rubber; they also make the first drive back on the road smoother, quieter, and less likely to reveal age-related issues after the car has been parked.
How long do tires on a 1974 American Motors typically last?
Tires on a 1974 American Motors should be judged more by age and condition than by mileage, because collector cars often accumulate very few miles while still aging in place. A sensible rule is to evaluate them closely beginning around five to seven years of service and to give serious replacement consideration as they approach ten years, even if the tread still looks good. The DOT date code on the tire is the starting point for that timeline. Bias-ply and radial tires both age, and low use does not stop that process.
That matters because a car that only attends shows or weekend cruises can still develop sidewall cracking, hardening, or internal deterioration long before the tread is worn out. A beautiful wide whitewall or redline can be visually impressive yet still be aged beyond what you would want for regular road use. If you recently acquired the car and the tire age is unclear, checking date codes should happen before planning any extended driving. Appearance, age, and driving plans all need to be weighed together.
How often should tires on a 1974 American Motors be inspected?
Tires on a 1974 American Motors should be inspected before every drive and again before any longer outing. Look for sidewall cracking, weather checking, cuts, bulges, uneven tread wear, punctures, and signs that the tire is losing pressure between uses. Check the spare as well, since many collector cars still carry an old but unused spare that may no longer be roadworthy. If your setup uses tubes, inspect valve stems and look for any signs of leakage around the stem area during routine maintenance.
Frequent inspection matters more on older hobby cars because they may sit for weeks and then go straight onto public roads at modern traffic speeds. A quick visual walk-around can catch issues before they become a roadside problem or cause damage to a freshly restored wheel opening or quarter panel. It also helps you spot alignment or suspension issues early if one tire begins wearing differently from the others. Tire inspection should be part of the same routine as checking fluids, belts, and brake feel before use.
Restoration & Authenticity
What tires were originally fitted to the 1974 American Motors Ambassador?
A 1974 American Motors Ambassador would have been associated first and foremost with period-correct bias-ply sizing, and the size family for the model includes F78-14, G78-14, and H78-14, with HR78-14 also appearing as a radial-era fitment. In practical restoration terms, that means a buyer should expect the Ambassador to live in the larger 14-inch full-size AMC range rather than the compact sizes used on Gremlin or Hornet. No single original-equipment brand should be assumed without factory literature or surviving-car evidence for the exact build and market.
For an accurate restoration, the important checkpoints are size, construction type, and sidewall treatment. A wide whitewall bias-ply look is much more in character for an upscale AMC full-size sedan or wagon than a performance-oriented raised white letter tire. If the car is being judged, consult marque specialists, original brochures, and event rules to confirm whether your specific Ambassador should wear a particular width of whitewall or whether a radial-era fitment is acceptable for that class. Those details can matter as much as the size code itself.
Does correct tire fitment matter for showing a 1974 American Motors?
Correct tire fitment matters a great deal when showing a 1974 American Motors, especially if the car is judged for originality. Size, construction, wheel diameter, and sidewall style all contribute to whether the car looks right for its model and role in the AMC lineup. A Hornet on compact-style blackwalls or narrow whitewalls presents very differently from an Ambassador on larger wide whitewalls, and a Javelin usually calls for a more performance-oriented visual theme. Judges and knowledgeable enthusiasts often notice those differences immediately.
The main risk is using a tire that is technically mountable but visually out of step with the car's era and purpose. A modern-looking radial treatment on a car restored to strict factory-bias standards, or an overly sporty sidewall on an upscale full-size model, can break the authenticity of the build. If the event has formal judging, consult that club's standards before final selection. If the goal is a respectful driver-quality restoration, staying within the proper size family and choosing an era-appropriate sidewall usually gets the look where it needs to be.
What is the difference between Firestone Wide Oval and Goodyear Custom Wide Tread for the 1974 American Motors?
For a 1974 American Motors using F70-14, Firestone Wide Oval and Goodyear Custom Wide Tread share the same basic size, bias-ply construction, 14-inch rim diameter, 6.00-7.00 inch rim-width range, and 1500-pound load rating at 32 psi. The main differences are in branding and sidewall presentation. Firestone Wide Oval appears in pin-white-stripe, redline, and RWL versions, while Goodyear Custom Wide Tread appears in RWL form. Their published weights are also close, with Firestone at 24 pounds and Goodyear at 25 pounds.
That means the choice usually comes down to the exact muscle-era look you want on the car. A buyer restoring a Javelin to a very specific visual theme may prefer the sidewall treatment that best matches factory literature, period photos, or personal memory of the era. The difference is less about basic compatibility and more about presentation. If your car is a driver rather than a concours restoration, pick the sidewall and brand character that fit the personality of your AMC while keeping the correct F70-14 size.
Safety & Road Use
Are 1974 American Motors tires safe for highway driving?
1974 American Motors tires can be suitable for highway driving when they are the correct size, properly mounted, correctly inflated, and in sound condition. The covered products here are largely bias-ply designs, with radial-size fitments also appearing in the year-make range for HR78-14 and FR78-14. No speed letters are shown on the covered product sizes in this set, so highway suitability comes back to the tire's condition, the exact product's sidewall markings, and the mechanical condition of the AMC itself. On older cars, brakes, steering, suspension, and wheel condition are often as important as the tire.
That means a healthy, properly prepared AMC can cruise safely at normal road speeds, but a freshly mounted tire is not a substitute for a broader roadworthiness check. Bias-ply tires also have their own on-road feel that may be unfamiliar to drivers used to modern radials, especially in tracking and response. Before taking a collector AMC onto faster roads, give the whole car a realistic evaluation and keep speeds appropriate to the vehicle's age, setup, and overall condition. Safe use is always a system-level question, not just a tire question.
What inflation pressure should I use for 1974 American Motors tires?
Inflation pressure on 1974 American Motors tires should follow the original vehicle recommendation for the car and the manufacturer's guidance for the exact reproduction tire you choose. The covered load-and-pressure figures vary by size: F78-14 is rated at 1500 pounds at 32 psi, G78-14 at 1620 pounds at 32 psi, H78-14 at 1770 pounds at 32 psi, 695-14 at 1230 pounds at 32 psi, F70-14 at 1500 pounds at 32 psi, and E60-15 at 1400 pounds at 32 psi. E78-14 also varies by product, including a 1400-pound at 32 psi passenger-style version and an STA 8-ply option rated much higher at 60 psi.
The important point is not to transfer one pressure figure from one AMC size to another just because the wheel diameter matches. A compact Gremlin tire, a full-size Ambassador tire, and a truck-style E78-14 do not belong on the same inflation assumption. Start with the vehicle recommendation when preserving original drivability, then make sure the actual tire's rated sidewall information supports the setup. If the car has been modified, loaded differently, or fitted with a specialty product, verify the final pressure strategy before regular use.
What should I check before taking a 1974 American Motors on a longer drive?
Before taking a 1974 American Motors on a longer drive, inspect all four tires and the spare for cracking, cuts, punctures, bulges, irregular wear, and proper inflation. Make sure the wheel diameter and tire size are consistent side to side, and verify that valve stems are sound, especially if your setup uses tubes. On a collector AMC, it is also wise to check lug-nut torque, wheel condition, and whether the tires have been losing air during storage. A long drive is the wrong time to discover an aging spare or a weather-checked sidewall.
Tires are only one piece of the preparation, but they are the only part of the car touching the road. Once the rubber checks out, move on to brakes, steering, cooling, fluids, belts, lights, and fuel-system condition, because a 1974 AMC asks for a more holistic pre-trip inspection than a modern daily driver. Pack simple emergency basics and give the car a short local shakedown if it has been sitting. That routine helps you catch small issues early and makes longer touring far more enjoyable.
