The 1959 Fiat 1100 belongs to an era when small European sedans were valued for efficiency, tidy dimensions, and everyday drivability rather than excess size or power. Its appeal today often comes from that honest postwar character, which makes tire choice an important part of preserving both the look and the road manners of the car. The 1959 Fiat 1100 uses either a 520-14 bias-ply tire or a 155R14 radial, both on 14-inch rims. That gives owners a real choice between traditional narrow whitewall bias-ply styling and blackwall radial presentation. The right selection depends on whether the goal is restoration-minded appearance, road use, or a change in construction.
Which Tire Size Is Right for The 1959 Fiat 1100
The 1959 Fiat 1100 uses two primary tire sizes, and the difference is centered on construction rather than wheel diameter. Both sizes fit a 14-inch rim, but one is a traditional 520-14 bias-ply and the other is a 155R14 radial, so the first step is deciding whether the car should retain a vintage-style bias-ply setup or use a radial configuration.
155R14 is a Euro-metric radial size in which 155 represents the nominal section width in millimeters, the R indicates radial construction, and 14 is the wheel diameter in inches. On a 1959 Fiat 1100, this size offers a period-appropriate metric radial format rather than a vintage domestic bias-ply designation. Available choices include Michelin and Firestone blackwall tires in radial series such as Michelin X Radial and F560 Radial. This size is worth considering when the car is set up for radial use and the goal is a narrow, traditional-looking radial on the correct rim diameter.
520-14 is a numeric bias-ply size, with 520 indicating an approximate 5.20-inch nominal section width and 14 identifying the wheel diameter. For the 1959 Fiat 1100, it represents the more traditional construction choice and carries the visual character many restoration-minded owners want from a small late-1950s European sedan. Available options center on Premium Sport Lowrider bias-ply tires with narrow whitewall treatments in different whitewall widths. This size deserves a close look when preserving vintage appearance matters as much as the tire's basic fitment.
Fitment is straightforward for the covered 1959 Fiat 1100 sub-model. The Base model uses the same two 14-inch tire-size paths, so the main decision is construction and appearance rather than sorting through different trim-level wheel diameters or separate size fitments.
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1959 Fiat 1100 Base
The 1959 Fiat 1100 Base can be fitted with either a 155R14 radial or a 520-14 bias-ply tire on a 14-inch rim. That means tire selection comes down to whether the car is being kept in a more traditional bias-ply presentation or set up around a classic radial configuration.
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 1959 Fiat 1100 Tires for Sale
Available 1959 Fiat 1100 tire choices include Michelin and Firestone radial blackwalls in 155R14, along with Premium Sport 520-14 bias-ply options in the Premium Sport Lowrider series. The main comparison points are construction, sidewall presentation, rim-width compatibility, and overall restoration versus road-use intent.
These 1959 Fiat 1100 tire FAQs focus on the two correct 14-inch size paths, how bias-ply and radial choices differ, and what to inspect before putting a collector-era Fiat back on the road.
Tire Size & Fitment
What tire size fits a 1959 Fiat 1100?
The 1959 Fiat 1100 uses two primary tire sizes: 155R14 in radial construction and 520-14 in bias-ply construction. Both are 14-inch fitments, so the size question is tied closely to whether the car is running a radial setup or a traditional bias-ply arrangement.
That makes the next step more important than simply matching the rim diameter. The tire should be chosen around the wheel in use, the car's current configuration, and the owner's priorities for appearance and road feel, especially if the Fiat has already been changed from one construction type to the other.
What size rim does a 1959 Fiat 1100 use?
The covered tire sizes for a 1959 Fiat 1100 both use a 14-inch rim diameter. That applies to the 155R14 radial and the 520-14 bias-ply, so wheel diameter remains consistent even though the tire sizing system and construction differ.
Rim diameter is only one part of the fitment picture. Before choosing between these tires, it still helps to confirm the actual wheel width on the car, since available products can carry different width ranges, and an older Fiat may no longer be wearing its original wheels after decades of service or restoration work.
Does the 1959 Fiat 1100 Base use the same tire size?
Yes. The 1959 Fiat 1100 Base uses the same two size paths covered here: 155R14 as a radial option and 520-14 as a bias-ply option. Both fit 14-inch rims, so the sub-model does not introduce a separate wheel diameter or a unique tire size.
That simplifies the buying decision, but it does not remove the need to verify the car's current setup. A Base model that has been restored, modified, or converted to a different wheel style should still be checked for wheel width, tire clearance, and the owner's intended use before choosing between bias-ply and radial construction.
Choosing the Right Tire
What should I consider when choosing a 1959 Fiat 1100 tire?
Start with the correct 14-inch size path for the car: 520-14 if the goal is a traditional bias-ply setup, or 155R14 if the Fiat is being equipped with a radial. That basic choice affects both appearance and construction, which is especially important on a compact late-1950s European sedan.
After that, compare the tires by sidewall style, brand, tire series, and wheel-width suitability where those details are available. A restoration-minded owner may lean toward the bias-ply whitewall presentation, while a driver-focused owner may prefer the classic blackwall radial format, provided the wheel and overall setup support it.
What sidewall styles are available for 1959 Fiat 1100 tires?
The available sidewall styles for the 1959 Fiat 1100 differ by tire size and construction. The 155R14 radial choices are blackwall tires, while the 520-14 bias-ply choices are offered with narrow whitewall styling, including different whitewall-width treatments within that vintage-style presentation.
Sidewall choice can change the visual character of the car as much as the construction itself. Blackwall radials keep the look simple and understated, while narrow whitewall bias-ply tires create a more decorative period-style appearance, so the better option depends on how original-looking or how restrained the finished Fiat should appear.
What brands offer tires for the 1959 Fiat 1100?
The 1959 Fiat 1100 has available tire choices from Michelin, Firestone, and Premium Sport. Michelin and Firestone appear in the 155R14 radial size, while Premium Sport covers the 520-14 bias-ply fitment with narrow whitewall options in the Premium Sport Lowrider series.
Brand matters most after the correct size and construction have already been settled. A buyer comparing these options should look at the brand together with sidewall treatment, tire series, load specification where shown, and compatible wheel width, since those details shape whether the tire suits a restoration-oriented car or a driver-focused setup.
Restoration & Appearance
Which tire should I choose for a period-style 1959 Fiat 1100?
For a period-style 1959 Fiat 1100, the 520-14 bias-ply size is the natural starting point because it preserves a vintage sizing format and is offered with narrow whitewall styling. That combination aligns closely with the visual language collectors often want from a late-1950s small sedan.
Appearance-focused selection still benefits from a little research beyond size alone. When exact originality matters, it is smart to compare the car against period photos, marque-club references, or restoration records so the chosen sidewall treatment and overall tire presentation match the way this Fiat is intended to be finished.
How does tire construction affect the appearance of a restored 1959 Fiat 1100?
Tire construction changes the visual impression of a restored 1959 Fiat 1100 in a noticeable way. A 520-14 bias-ply gives the car a more traditional vintage presentation, especially with a narrow whitewall, while a 155R14 radial delivers a cleaner blackwall look that reads as more subdued and more modern in profile.
That choice influences more than style at a glance. Owners trying to preserve a distinctly late-1950s feel often begin with the bias-ply route, while those prioritizing a classic radial appearance should still make sure the car's wheel setup supports the selected tire without assuming every 14-inch wheel is automatically the same.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1959 Fiat 1100?
Yes. Even though the 1959 Fiat 1100 uses 14-inch tire fitments, modifications can still affect which tire works best on the car. Aftermarket wheels, different wheel widths, suspension changes, or body and fender work can all influence clearance and how a radial or bias-ply tire sits on the vehicle.
That is why the current setup matters more than assumptions based on age alone. A Fiat that has been lowered, widened, or fitted with replacement wheels should be checked for steering clearance, fender space, and wheel dimensions before choosing between 155R14 and 520-14, especially when changing construction type at the same time.
What should I inspect before driving a 1959 Fiat 1100 on new tires?
Before driving a 1959 Fiat 1100 on new tires, inspect the wheels, valve stems, and overall mounting condition, then confirm that the tires hold air properly and clear the body and suspension through the full steering range. It also helps to check alignment-related wear points and make sure the car is sitting evenly.
A collector-era car deserves a broader look before road use. Brake condition, wheel-bearing health, suspension wear, and proper tire pressure should be reviewed so the new tires are not being asked to compensate for mechanical issues, and a short local test drive is a sensible way to catch rubbing or vibration early.
How should tires on a collector 1959 Fiat 1100 be maintained?
Tires on a collector 1959 Fiat 1100 should be maintained with regular pressure checks, routine visual inspection, and careful storage habits. Sidewall cracking, cuts, bulges, flat spotting, uneven wear, and slow air loss all deserve attention, especially on a car that may spend long periods parked between drives.
Good storage conditions make a real difference on a lightly used vintage car. Keeping the Fiat away from prolonged sunlight, moisture, and ozone sources helps preserve tire condition, and the car should be inspected before each outing rather than relying on tread alone, since age and inactivity can matter as much as mileage.
