By 1980, Jeep trucks covered a wide span of utility vehicles, from open CJ models built around off-road simplicity to the Cherokee and the heavier-duty J20 pickup. That breadth matters when sorting out tires, because 1980 Jeep Trucks did not use one universal size across the range. Four models share six distinct sizes, with the CJ5 and CJ7 overlapping heavily, the Cherokee mixing radial and bias-ply 15-inch options, and the J20 standing apart on 16.5-inch truck tires. The first thing to confirm is your exact model, then whether you want a radial or bias-ply tire where both types are available, before narrowing down the right size.
Which Tire Size Is Right for Your 1980 Jeep Trucks
Six tire sizes appear across 1980 Jeep Trucks, and they vary by model rather than carrying across the full lineup. The real decision starts with identifying whether you have a CJ5, CJ7, Cherokee, or J20, then confirming whether your wheels are 15-inch or 16.5-inch before comparing radial and bias-ply choices where both constructions exist. Understanding that distinction up front saves time and helps match the tire to the right vehicle and intended use.
Year(s): 1980|Fit(s): CJ5, CJ7, Cherokee|Construction: Radial|Rim: 15 in
225/75R15 is a radial size with a 225-millimeter section width, a stated 75-series aspect ratio, and fitment for a 15-inch wheel. This size is available from BFGoodrich, Coker Classic, and American Classic with wide whitewall and narrow whitewall styles, and load ratings run from 1,874 pounds at 35 psi to 2,094 pounds at 32 psi. Because it is used on the CJ5, CJ7, and Cherokee rather than the full 1980 Jeep Trucks range, it should be matched to those models only. It suits owners who want a more modern radial format while staying within a period-compatible 15-inch fitment.
Year(s): 1980|Fit(s): CJ5, CJ7|Construction: Bias Ply|Rim: 15 in
G78-15 is an alphanumeric bias-ply size in which the letter-number code denotes the tire's nominal size range and the 15 identifies a 15-inch wheel. Coker Classic offers it in wide whitewall form, while STA offers a blackwall version, and load capacity reaches 1,620 pounds at 32 psi on the Coker Classic versions. This size is specific to the CJ5 and CJ7 rather than universal across 1980 Jeep Trucks. It is the better fit for owners aiming for an older bias-ply look and feel on short-wheelbase Jeep models.
Year(s): 1980|Fit(s): CJ5, CJ7, Cherokee|Construction: Bias Ply|Rim: 15 in
L78-15 is an alphanumeric bias-ply size, with the L78 code identifying its nominal size range and the 15 calling for a 15-inch wheel. It is available from Coker Classic and BFGoodrich in blackwall, wide whitewall, and narrow whitewall styles, with load ratings of 1,970 pounds at 32 psi across the products carrying load information. This size fits the CJ5, CJ7, and Cherokee, but not the J20. It is a strong choice for drivers who want a fuller vintage bias-ply appearance on 15-inch Jeep wheels.
10-15 is a numeric bias-ply truck size in which the leading number identifies nominal section width and the 15 indicates a 15-inch wheel. No product range is attached to this size here, so sidewall style, tube status, speed rating, and load details are not part of the current product selection. This size is specific to the Cherokee and does not apply across the rest of 1980 Jeep Trucks. It belongs to a more utility-oriented, old-style truck fitment path than the radial 225/75R15 option.
Year(s): 1980|Fit(s): J20|Construction: Bias Ply|Rim: 16.5 in
875-16.5 is a numeric bias-ply truck size, using a nominal section-width code and mounting on a 16.5-inch wheel. STA offers this size in blackwall form through Traxion and Transport Highway versions, giving the J20 a distinctly truck-oriented tire selection. This size is specific to the J20 and is not shared with the CJ or Cherokee models. It suits owners keeping a heavy-duty bias-ply setup on the larger 16.5-inch wheel platform.
Year(s): 1980|Fit(s): J20|Construction: Bias Ply|Rim: 16.5 in
950-16.5 is a numeric bias-ply truck size with a larger nominal section-width code than 875-16.5, and it also fits a 16.5-inch wheel. STA offers it as blackwall Traxion and Super Transport tires, with load capacity reaching 2,780 pounds at 60 psi and a rim-width range of 6.50 to 6.75 inches. This size is exclusive to the J20 within the 1980 Jeep Trucks lineup. It is the heavier-duty choice for owners maintaining a period-style truck tire on the J20.
Four Jeep truck models are covered for 1980, and tire size changes with the model rather than staying the same across the range. That means year and make alone are not enough here: a CJ5 or CJ7 uses different tire families than a Cherokee, and the J20 moves into a separate 16.5-inch truck fitment altogether. Select your model below to narrow the fitment history and see the tire choices that apply to that specific Jeep.
1980 Jeep Trucks CJ5
The CJ5 was Jeep's compact, short-wheelbase open utility model, known for its simple body, removable top options, and strong off-road identity. Its tires mount on 15-inch wheels, and the available sizes mix a radial option with two bias-ply choices depending on how original or how road-friendly you want the setup to feel.
The CJ7 carried the classic Jeep formula into a slightly longer and more versatile package than the CJ5, making it especially popular with drivers who wanted trail use and everyday usability in the same vehicle. Like the CJ5, it uses 15-inch wheel fitments, with one radial size and two bias-ply sizes available across its tire choices.
The 1980 Cherokee sat in Jeep's full-size lineup and combined utility with a more enclosed, wagon-style body than the open CJ models. Its fitments stay on 15-inch wheels, but the size mix differs from the CJ line by pairing the radial 225/75R15 and bias-ply L78-15 with a 10-15 truck-type bias-ply option.
The J20 was Jeep's heavy-duty full-size pickup, built for payload and work use rather than the lighter recreational role of the CJ models. It stands apart from the rest of 1980 Jeep Trucks with 16.5-inch wheel fitments and two larger numeric bias-ply truck sizes that reflect its more serious load-carrying role.
Twenty-one products are available across six tire sizes for 1980 Jeep Trucks. The 225/75R15 has 7 radial options from BFGoodrich, Coker Classic, and American Classic in wide and narrow whitewall styles; G78-15 has 3 bias-ply choices from Coker Classic and STA in wide whitewall and blackwall; L78-15 has 7 bias-ply options from Coker Classic and BFGoodrich in blackwall, wide whitewall, and narrow whitewall; 875-16.5 and 950-16.5 are bias-ply blackwall truck tires from STA.
Radial Tires
BFGoodrich Silvertown Radial | 2.75 Inch Whitewall | 225/75R15
These FAQs sort out the model-by-model size differences across 1980 Jeep Trucks, the radial-versus-bias choice on 15-inch applications, sidewall style options, and the practical checks that matter before regular road use or long-term collector storage.
Size Basics & Fitment
What tire sizes fit 1980 Jeep Trucks vehicles?
1980 Jeep Trucks use six sizes across four models: 225/75R15, G78-15, and L78-15 on the CJ5; 225/75R15, G78-15, and L78-15 on the CJ7; 225/75R15, L78-15, and 10-15 on the Cherokee; and 875-16.5 and 950-16.5 on the J20. The CJ and Cherokee sizes mount on 15-inch wheels, while the J20 sizes mount on 16.5-inch wheels. Rim-width guidance appears on several sizes, including 6.00 to 8.00 inches or 6 to 7.5 inches for 225/75R15, 5.00 to 7.00 inches for G78-15, 5.50 to 8.00 inches for L78-15, and 6.50 to 6.75 inches for 950-16.5.
That spread means the first fitment step is identifying the exact model, not just the year and make. A CJ owner may be choosing between radial and bias-ply 15-inch sizes, a Cherokee owner may be comparing car-style and truck-style 15-inch options, and a J20 owner needs to stay within the 16.5-inch truck category. Confirm the wheel diameter already on the Jeep and compare it to the tire's required rim diameter before moving on to sidewall style or construction.
What does 225/75R15 mean on a 1980 Jeep Trucks tire?
On a 1980 Jeep Trucks tire, 225/75R15 is a metric radial size. The 225 is the nominal section width in millimeters, 75 is the aspect ratio, the R marks radial construction, and 15 means the tire fits a 15-inch wheel. Within the 1980 Jeep Trucks range, that size appears on the CJ5, CJ7, and Cherokee, but not on the J20.
That matters because 225/75R15 is a more modern sizing language than the older alphanumeric and numeric bias-ply codes also used in 1980. It gives Jeep owners a radial option on 15-inch applications without moving away from the factory wheel diameter. If your Jeep currently wears an older-size bias-ply tire, confirm wheel diameter and rim-width range before assuming the radial alternative is a direct substitute on every existing wheel.
What do G78-15, L78-15, 10-15, and 950-16.5 mean on 1980 Jeep Trucks tires?
On 1980 Jeep Trucks, G78-15 and L78-15 are alphanumeric bias-ply sizes, where the letter-number code identifies the tire's nominal size range and the 15 indicates a 15-inch wheel. The 10-15, 875-16.5, and 950-16.5 sizes are numeric bias-ply truck sizes, using a nominal section-width code followed by wheel diameter. G78-15 fits the CJ5 and CJ7, L78-15 fits the CJ5, CJ7, and Cherokee, 10-15 is Cherokee-specific, and 875-16.5 and 950-16.5 are J20-only sizes.
These older codes are easy to misread if you are used to metric radial sizing. The key point is that they describe different tire families and not just alternate brand names for the same dimensions. A 15-inch code still needs a 15-inch wheel, and a 16.5-inch code must stay on a 16.5-inch wheel. Once the wheel diameter is confirmed, you can compare whether the Jeep is better served by a vintage-style bias-ply appearance or by the radial option available on some 15-inch models.
Do all 1980 Jeep Trucks models use the same tire size?
No, 1980 Jeep Trucks models do not all use the same tire size. The CJ5 and CJ7 share 225/75R15, G78-15, and L78-15; the Cherokee shares 225/75R15 and L78-15 but also has a model-specific 10-15 size; and the J20 uses only 875-16.5 and 950-16.5. The lineup also splits by wheel diameter, with most models on 15-inch tires and the J20 on 16.5-inch truck tires.
That is why model identification matters before any product comparison begins. If you know only that you have a 1980 Jeep, you can still end up in the wrong size family, especially if you cross from CJ or Cherokee fitments into J20 territory. Check the model badge, body style, and current wheel diameter first. After that, decide whether originality, sidewall appearance, or regular road use is the main priority for the tire choice.
Buying the Right Tire
Should I choose the 225/75R15 or a bias-ply size for my 1980 Jeep Trucks?
For a 1980 Jeep Trucks CJ5, CJ7, or Cherokee running 15-inch wheels, the 225/75R15 is the radial option, while G78-15, L78-15, and 10-15 are bias-ply choices depending on model. A radial construction typically appeals to owners who want a more modern tire format for regular driving, while bias-ply construction appeals to owners who want a more period-style appearance and feel. The J20 does not enter this comparison because its sizes are 875-16.5 and 950-16.5 only.
The better choice depends less on the year and make than on how the Jeep is being finished and used. A restored CJ or Cherokee meant to look era-correct often points buyers toward an alphanumeric or numeric bias-ply size, especially with period-style sidewalls. A Jeep that will see more frequent road time often pushes the decision toward the 225/75R15 radial. Keep the comparison within the sizes that apply to your exact model rather than treating every 15-inch Jeep tire as interchangeable.
What sidewall styles are available for 1980 Jeep Trucks tires?
1980 Jeep Trucks tires cover a broad sidewall range depending on size. The 225/75R15 radial comes in wide whitewall and narrow whitewall versions. G78-15 is available in wide whitewall and blackwall, while L78-15 spans blackwall, wide whitewall, and narrow whitewall. The 875-16.5 and 950-16.5 J20 truck sizes are blackwall offerings.
That variety gives owners room to steer a Jeep toward either a more refined period look or a more work-truck, utility-oriented presentation. Whitewalls make the strongest visual statement on the 15-inch CJ and Cherokee sizes, while blackwalls fit naturally with the tougher personality of truck-duty applications. For an authenticity-focused restoration, sidewall style matters almost as much as size and construction, so compare the look you want with period photos, club guidance, and the specific model's intended character.
What brands make tires for 1980 Jeep Trucks vehicles?
Three brands cover the 1980 Jeep Trucks sizes with active product choices: BFGoodrich, Coker Classic, and American Classic on 15-inch passenger and utility fitments, plus STA on bias-ply Jeep and truck applications. The 225/75R15 is available from BFGoodrich, Coker Classic, and American Classic. G78-15 comes from Coker Classic and STA, L78-15 comes from Coker Classic and BFGoodrich, and both 875-16.5 and 950-16.5 are covered by STA.
Brand choice is useful once the size and construction are already settled, not before. A CJ owner comparing G78-15 options, for example, is really deciding between a more dressy whitewall presentation and a more truck-like blackwall presentation as much as between brand names. A J20 owner has a more focused path, since both 16.5-inch sizes stay in STA's truck-oriented range. Start with the right size family, then narrow by sidewall style and series character.
Fitting & Setup
What rim width do 1980 Jeep Trucks tires require?
Several 1980 Jeep Trucks sizes include clear rim-width ranges. The 225/75R15 radial fits 6.00 to 8.00-inch rims in some versions and 6 to 7.5-inch rims in others. G78-15 fits 5.00 to 7.00-inch rims, L78-15 fits 5.50 to 8.00-inch rims, and 950-16.5 fits 6.50 to 6.75-inch rims. Wheel diameter still has to match the tire size exactly: 15-inch tires on 15-inch wheels and 16.5-inch tires on 16.5-inch wheels.
The practical takeaway is to compare your actual wheel to the exact tire you are considering rather than assuming every product in the same nominal size has the same wheel requirement. That is especially important on the 225/75R15 radial, where the acceptable rim range changes slightly by series. Measuring the wheel before ordering helps avoid a situation where the size is correct in diameter but not ideal in rim width for the chosen tire.
Do 1980 Jeep Trucks tires require inner tubes?
Tube requirements are not universal across 1980 Jeep Trucks because the product range does not carry one consistent tube marking across every size. The 225/75R15 radial offerings are presented without tube-type markings, while the bias-ply Jeep and truck sizes are also not identified here with a single all-size tube status. That means tube use can vary by the exact tire and by the wheel being used, especially on older original rims.
The safest approach is to check the sidewall marking on the exact tire you intend to run and compare it to the wheel's condition and design. Older wheels may need more careful evaluation than the tire size alone suggests, particularly if the Jeep has seen wheel swaps over the years. If your tire choice or wheel setup calls for a tube, include the valve stem and spare in the same inspection so the whole package is ready for service.
Can the original 1980 Jeep Trucks wheels be used with all tire sizes?
Original 1980 Jeep Trucks wheels can only be used with the tire sizes that match their wheel diameter and acceptable rim width. CJ5, CJ7, and Cherokee fitments stay in the 15-inch family, while the J20 uses 16.5-inch sizes only. Even within the 15-inch group, the correct wheel still needs to fall within the tire's approved rim-width range, such as 5.00 to 7.00 inches for G78-15 or 5.50 to 8.00 inches for L78-15.
That means an original wheel can often support more than one size within its model family, but not automatically every size across the whole year and make. A CJ owner may have more flexibility among 15-inch options than a J20 owner, whose wheel diameter is unique to that model here. Before switching from one size or construction to another, verify the wheel dimensions directly so the tire and wheel remain compatible as a set.
Maintenance, Storage & Longevity
How should I store a 1980 Jeep Trucks when the tires are fitted?
A 1980 Jeep Trucks should be stored away from direct sunlight, standing water, and ozone sources such as electric motors, battery chargers, and welders. Clean, dry floors and stable temperatures help preserve the rubber, and keeping the tires properly inflated reduces casing stress while the vehicle sits. Because this year and make can use both radial and bias-ply tires, storage behavior matters: bias-ply tires tend to flat-spot more readily during long periods of inactivity.
If the Jeep will sit for months at a time, move it occasionally to change the tire contact patch or support it in a way that reduces constant load on one spot. That is especially worthwhile on a CJ or Cherokee running bias-ply tires. A J20's larger truck tires also benefit from regular pressure checks during storage. Tire covers add another layer of protection if the vehicle is kept in an area with daylight exposure.
How long do tires on a 1980 Jeep Trucks typically last?
Tires on a 1980 Jeep Trucks should be judged more by age and condition than by mileage, because collector and specialty vehicles often see limited use. A practical rule is to evaluate them closely once they reach about five to seven years of age and to treat around ten years as the point where replacement deserves serious consideration, even if tread depth still looks acceptable. The DOT date code on the tire sidewall is the starting point for that timeline.
That approach matters because an older Jeep can spend a great deal of time parked, and rubber ages even when the odometer does not move much. Sidewall cracking, hardening, recurring air loss, or vibration can move replacement higher on the priority list regardless of age. If the Jeep was acquired with older tires already installed, check the date codes first before putting much value on appearance alone.
How often should tires on a 1980 Jeep Trucks be inspected?
Tires on a 1980 Jeep Trucks should be inspected before every drive and given a more thorough once-over before any longer outing. Look for sidewall cracking, cuts, bulges, irregular tread wear, and signs that the tire has been run underinflated. Air pressure should be checked with a dependable gauge, and the spare deserves the same attention as the four road tires because a vintage or specialty tire is only useful if it is ready when needed.
A short local drive can hide problems that become obvious only at speed or under load, so a careful pre-drive inspection is part of responsible old-vehicle use. If your Jeep uses a tube-dependent setup, inspect valve stems and any slow leak behavior just as closely as the tire casing itself. Catching a cracked sidewall or weak stem in the garage is far easier than dealing with it on the shoulder.
Restoration & Authenticity
What tires were originally fitted to the 1980 Jeep Trucks CJ5?
For a 1980 Jeep Trucks CJ5, bias-ply sizes such as G78-15 and L78-15 align closely with the traditional construction style still associated with many Jeep applications of the period, while 225/75R15 represents the radial path available within the same 15-inch wheel family. That does not make one automatically correct for every individual Jeep, because dealer practice, package differences, and owner changes over time can affect what a vehicle wore when new.
If originality matters, start by matching the construction type and size family that best fits your CJ5's intended restoration standard, then confirm details against factory literature, unrestored examples, or a Jeep marque specialist. Sidewall style also affects authenticity, especially if you are trying to recreate a specific showroom or regional look. A club with CJ expertise is often the best source for settling trim- and market-specific questions.
Does correct tire fitment matter for showing a 1980 Jeep Trucks?
Correct tire fitment does matter when showing a 1980 Jeep Trucks, especially in judged classes where size, construction type, and sidewall style all contribute to the vehicle's overall authenticity. A CJ or Cherokee wearing a modern radial can look different from one wearing a period-style bias-ply, and a wide whitewall creates a very different impression than a blackwall. Judges and knowledgeable enthusiasts often notice those differences quickly.
The right choice depends on the standard you are chasing. A touring Jeep built to drive regularly may reasonably favor one path, while a show-oriented restoration may need a more era-appropriate size and sidewall presentation. Event rules vary, so compare your tire plan with the judging guide or club expectations for the class you intend to enter. That extra step can prevent a visually obvious mismatch after the restoration is otherwise complete.
What is the difference between the STA Traxion and STA Super Transport for the 1980 Jeep Trucks J20?
For the 1980 Jeep Trucks J20 in 950-16.5, STA Traxion and STA Super Transport share the same 16.5-inch rim diameter, the same 6.50 to 6.75-inch rim-width range, and the same load figure of 2,780 pounds at 60 psi. Their most visible difference here is series identity and a slight weight change, with the Traxion at 40 pounds and the Super Transport at 41 pounds. Both are blackwall bias-ply truck tires intended for the J20's heavier-duty role.
That means the decision is not about one carrying more load than the other in this size, but about choosing the series that best matches the look and service character you want on a period-style truck. When two products share key dimensions and load capacity, details such as tread character, visual style, and the way the tire fits the overall restoration theme become more important. Keep the comparison within the exact 950-16.5 size rather than generalizing across all J20 tires.
Safety & Road Use
Are 1980 Jeep Trucks tires safe for highway driving?
1980 Jeep Trucks tires can be suitable for highway driving when the size, condition, inflation, and wheel match are correct, but the answer depends on the exact tire chosen. The 225/75R15 radial is the most highway-familiar format in this range, while the bias-ply sizes reflect more traditional construction. No speed letters appear here for these Jeep sizes, so safe road use depends heavily on staying within the tire maker's intended service role and the vehicle's own condition.
A 1980 Jeep's brakes, steering, suspension, alignment, and age-related wear can influence real-world highway confidence just as much as the tire itself. That is especially true on short-wheelbase CJs and on heavier J20 trucks carrying larger bias-ply tires. Before spending time at sustained road speeds, make sure the tires are fresh and sound, the pressures are correct, and the rest of the chassis is ready for the same kind of use.
What inflation pressure should I use for 1980 Jeep Trucks tires?
Inflation pressure for 1980 Jeep Trucks should follow the vehicle recommendation for the application and the tire maker's rating for the exact product. Several sizes here include pressure-linked load figures: 225/75R15 ranges from 1,874 pounds at 35 psi to 2,094 pounds at 32 psi depending on the product, G78-15 carries 1,620 pounds at 32 psi, L78-15 carries 1,970 pounds at 32 psi, and 950-16.5 carries 2,780 pounds at 60 psi. Those figures should not be transferred from one size to another.
That is why inflation should never be guessed from appearance alone or copied from a different Jeep model. A CJ5 on 225/75R15 radial tires and a J20 on 950-16.5 truck tires live in very different pressure and load worlds. Use the owner's manual as the baseline for the vehicle and the tire sidewall or manufacturer's guidance for the tire itself, then fine-tune only within those limits for how the Jeep is actually used.
What should I check before taking a 1980 Jeep Trucks on a longer drive?
Before taking a 1980 Jeep Trucks on a longer drive, inspect every tire for cracking, cuts, bulges, tread wear, and correct inflation, and make sure the spare is just as roadworthy as the tires on the ground. If the Jeep uses an older-style setup that may involve tubes, pay close attention to valve stems and any history of slow air loss. Wheel-condition checks also matter, especially on older original rims or wheels that may have been repainted, repaired, or swapped years ago.
Tires are only one part of the pre-trip picture on a 1980 Jeep. Brake feel, steering play, wheel-bearing condition, cooling system health, and charging system reliability all matter on a vehicle of this age. A longer drive is the wrong time to discover a cracked sidewall or a weak spare. Treat the tire inspection as part of a broader mechanical readiness check, not as a separate cosmetic step.
