The 1968 Fiat 1500 sits in a European touring tradition that values tidy proportions, light steering feel, and balanced road manners over sheer size. Whether in Convertible or L Sedan form, it is the kind of car where tire choice affects both stance and character. Fitment for this model year spans 14-inch bias-ply and radial options, with the Convertible using 520-14 or 145R14 and the L Sedan using 5.90-14 or 165R14. That gives owners a meaningful choice between traditional bias-ply presentation and more modern radial construction. The right decision starts with the exact sub-model, then moves to appearance, wheel compatibility, and how the car will actually be driven.
Which Tire Size Is Right for The 1968 Fiat 1500
The 1968 Fiat 1500 uses four primary tire sizes, and the correct one depends on the sub-model rather than a one-size-fits-all fitment. All of them mount on 14-inch rims, but the Convertible and L Sedan use different size pairings and can be equipped with either bias-ply or radial construction. Identifying the exact body style is the first step before choosing a tire.
145R14 is a Euro-metric radial size that uses a 145 millimeter nominal section width, radial construction, and a 14-inch rim diameter. On the 1968 Fiat 1500, this radial fitment applies to the Convertible and gives buyers a more modern sizing format than the older numeric bias-ply alternative. Available choices include Firestone and Camac blackwall radials in the F560 Radial and BN313 Radial series. This size makes sense for Convertible owners who want a radial tire in the proper rim diameter while preserving a compact, vintage European tire profile.
520-14 is a numeric bias-ply size in which the 5.20 designation refers to the tire's nominal section width in inches, paired with a 14-inch rim. For the 1968 Fiat 1500 Convertible, it represents the traditional bias-ply fitment and a more period-style presentation than the radial alternative. Product choices center on Premium Sport Lowrider bias-ply tires with narrow whitewall treatments in different whitewall widths. This size is the one to evaluate when the goal is to keep the Convertible's tire appearance closer to an earlier bias-ply look and feel.
165R14 is a Euro-metric radial size with a 165 millimeter nominal section width, radial construction, and a 14-inch rim diameter. On the 1968 Fiat 1500, this size applies to the L Sedan and gives that sub-model a wider radial fitment than the Convertible's 145R14. Choices include blackwall radials from Pirelli, Michelin, and Vredestein across the Cinturato CA67, Michelin XAS, and Sprint Classic series. This size is worth choosing when the L Sedan has the corresponding wheel setup and the owner wants a radial option aligned with the sedan's specific fitment.
5.90-14 is a numeric bias-ply size in which the 5.90 figure denotes nominal section width in inches and the 14 identifies the wheel diameter. For the 1968 Fiat 1500, this bias-ply size belongs with the L Sedan rather than the Convertible, making sub-model confirmation especially important. Its main appeal is maintaining the sedan's traditional construction style and vintage tire profile on a 14-inch wheel. Buyers considering this size should use it as the starting point for a restoration-oriented or period-style L Sedan tire choice, then confirm the actual wheel setup on the car.
Sub-model fitment matters on the 1968 Fiat 1500 because the Convertible and L Sedan do not share the same tire sizes. Both body styles use 14-inch wheels, but each has its own bias-ply and radial pairing, so identifying the exact sub-model is the key first step.
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1968 Fiat 1500 Convertible
The 1968 Fiat 1500 Convertible uses either a 145R14 radial or a 520-14 bias-ply tire on a 14-inch rim. That gives Convertible owners a clear choice between a modern radial format and a more traditional bias-ply appearance, with wheel width and overall presentation guiding the final decision.
The 1968 Fiat 1500 L Sedan uses a different pair of 14-inch tire sizes: 165R14 in radial form or 5.90-14 in bias-ply form. That means sedan owners should focus on the broader L Sedan fitment first, then choose between traditional construction and radial product options that match the car's current wheel setup.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1968 Fiat 1500 Tires for Sale
Available 1968 Fiat 1500 tire choices span Firestone, Camac, Pirelli, Michelin, Vredestein, and Premium Sport, depending on size and sub-model. Buyers can compare blackwall radials in several European-style series alongside 520-14 bias-ply narrow whitewall options for a more traditional look.
These 1968 Fiat 1500 FAQs focus on the exact issues owners usually need to sort out first: sub-model-specific tire size, 14-inch rim fitment, bias-ply versus radial choices, appearance, and the checks worth making before putting a collector car back on the road.
Tire Size & Fitment
What tire size fits a 1968 Fiat 1500?
The 1968 Fiat 1500 does not use one universal tire size across every version. The Convertible uses either 145R14 in radial form or 520-14 in bias-ply form, while the L Sedan uses either 165R14 in radial form or 5.90-14 in bias-ply form.
That makes the exact sub-model the first thing to confirm before choosing a tire. Once the body style is established, the next step is deciding whether to stay with the traditional bias-ply format or select the radial size associated with that same sub-model and 14-inch wheel setup.
What size rim does a 1968 Fiat 1500 use?
The 1968 Fiat 1500 uses 14-inch rims across its covered tire fitments. Both Convertible and L Sedan sizes are built around a 14-inch wheel diameter, even though the actual tire sizes differ between the two sub-models and between bias-ply and radial choices.
Rim diameter is only part of the fitment picture, so it should not be the only check. Wheel width still matters, especially when moving between older bias-ply sizing and radial construction, and any car with replacement wheels should be measured before a tire is selected.
Why does the 1968 Fiat 1500 have more than one tire size?
More than one tire size appears because the 1968 Fiat 1500 is represented by two sub-models with different fitment pairings. The Convertible uses 145R14 or 520-14, while the L Sedan uses 165R14 or 5.90-14, and each sub-model can be equipped in either radial or bias-ply form.
The important takeaway is that the size difference is not random product variation. It reflects a real distinction between body styles, so choosing a tire starts with the exact Fiat 1500 version in front of you and the wheel setup actually mounted on the car.
Bias-Ply & Radial Options
Is 520-14 a bias-ply or radial tire for the 1968 Fiat 1500?
520-14 is a bias-ply tire size for the 1968 Fiat 1500 Convertible. It is the vintage numeric bias-ply option associated with that sub-model, while 145R14 is the Convertible's radial-size alternative on the same 14-inch rim diameter.
That distinction matters because a bias-ply tire affects both appearance and construction choice. Anyone selecting 520-14 should confirm the actual wheel width on the car and decide whether the goal is a more traditional presentation or a move toward radial behavior through the corresponding radial size.
Should I use bias-ply or radial tires on a 1968 Fiat 1500?
A 1968 Fiat 1500 can be set up with either bias-ply or radial tires, but the correct size depends on the sub-model. The Convertible uses 520-14 in bias-ply or 145R14 in radial form, while the L Sedan uses 5.90-14 in bias-ply or 165R14 in radial form.
The better choice depends on how the car is being used and how closely the owner wants to preserve a traditional tire look. Construction changes should be matched to the proper sub-model size, and the wheel width, clearance, and overall setup should be checked before making the switch.
What should I check before converting my 1968 Fiat 1500 from bias-ply to radial tires?
The first check is making sure the radial size matches the correct sub-model. On a 1968 Fiat 1500, that means 145R14 for the Convertible or 165R14 for the L Sedan rather than simply choosing any 14-inch radial that seems close in diameter.
Wheel width deserves close attention because the radial products in these sizes do not all share the same rim-width range as older bias-ply tires. It is also smart to inspect clearance at the fenders and steering, especially if the car has replacement wheels, suspension changes, or a stance different from stock.
Choosing the Right Tire
What should I consider when choosing a 1968 Fiat 1500 tire?
Start with the exact sub-model, because the Convertible and L Sedan use different size pairings. After that, the main decision is whether the car should stay with its traditional bias-ply format or move to the radial size associated with that same body style and 14-inch rim diameter.
Beyond size and construction, compare the visible product differences that affect how the car will look and sit. Blackwall radials suit a more European touring presentation, while the available 520-14 bias-ply options focus on narrow whitewall styling for owners who want a more traditional visual treatment.
What sidewall styles are available for 1968 Fiat 1500 tires?
Sidewall style depends on the tire size you choose for the 1968 Fiat 1500. The radial options in 145R14 and 165R14 are offered as blackwall tires, while the available 520-14 bias-ply choices are narrow whitewall tires in more than one whitewall width.
That means sidewall appearance is tied closely to both sub-model and construction choice. A buyer trying to preserve a restrained European look may lean toward blackwall radials, while someone pursuing a stronger vintage visual statement may prefer one of the narrow whitewall bias-ply options.
What brands offer tires for the 1968 Fiat 1500?
Brand selection varies by size on the 1968 Fiat 1500. Firestone and Camac offer 145R14 radial choices for the Convertible, Pirelli, Michelin, and Vredestein appear in 165R14 for the L Sedan, and Premium Sport covers the available 520-14 bias-ply options.
The useful way to compare brands here is by matching them to the correct sub-model and tire format first. Once the size is settled, look at tire series, sidewall presentation, and wheel-width suitability instead of assuming one brand applies equally well across every Fiat 1500 configuration.
Restoration & Appearance
Which tire should I choose for a period-style 1968 Fiat 1500?
For a period-style 1968 Fiat 1500, the traditional starting point is the bias-ply size tied to the correct sub-model: 520-14 for the Convertible or 5.90-14 for the L Sedan. Those sizes preserve the older numeric sizing format and the construction style most closely associated with vintage tire presentation.
A restoration-focused choice should still be checked against the car's current wheels, since many older Fiats have been changed over time. When exact historical originality matters, period photos, marque-club guidance, and other vehicle-specific references can help narrow down the most appropriate final appearance.
How does tire construction affect the appearance of a restored 1968 Fiat 1500?
Tire construction changes more than ride feel on a restored 1968 Fiat 1500; it also changes the car's visual character. Bias-ply sizes such as 520-14 and 5.90-14 give the car a more traditional vintage presentation, while 145R14 and 165R14 radials read as a more modern European-style setup.
Sidewall treatment adds another layer to that choice. The available radials are blackwalls, while the 520-14 bias-ply options use narrow whitewall styling, so the final appearance can shift noticeably even before wheel details or stance are taken into account.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1968 Fiat 1500?
Yes, modifications can affect tire fitment on a 1968 Fiat 1500 even when the tire size itself is correct for the sub-model. Replacement wheels, altered wheel width, suspension changes, or body and fender work can all change how a 14-inch tire sits and clears the car.
That is especially important on a compact vintage Fiat, where small setup changes can matter. Any car with aftermarket wheels or a changed ride height should be checked for steering clearance, fender clearance, and actual wheel dimensions before finalizing either a bias-ply or radial selection.
What should I inspect before driving a 1968 Fiat 1500 on new tires?
Before driving a 1968 Fiat 1500 on new tires, inspect the wheels, valve stems, and general condition of the suspension and steering components. It also helps to confirm that the mounted tire size matches the correct sub-model and that the tires seat properly on the 14-inch rims being used.
A short, careful initial drive is a smart way to confirm there is no rubbing, pull, or unusual vibration. Collector cars that sit for long periods also deserve a quick review of inflation pressure and visible condition before use, even when the tires themselves are recently installed.
How should tires on a collector 1968 Fiat 1500 be maintained?
Tires on a collector 1968 Fiat 1500 should be checked regularly for inflation, visible cracking, cuts, bulges, and uneven wear, especially if the car spends long periods parked. Low-use vintage cars can age tires quietly, so condition matters just as much as tread depth.
Storage habits make a difference as well. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve tire condition, and it is wise to inspect the tires again before longer drives so any age-related issues are caught before road use.
