The 1967 Fiat 1800 sits in the era when European family cars were blending practical sedan and wagon usefulness with increasingly modern road manners. For owners today, tire choice is tied closely to that split, because the sedan uses 15-inch fitments while the wagon uses 14-inch fitments, and each appears with both radial and bias-ply size conventions. That means the decision is not just about replacing an old tire, but about matching the correct size, wheel diameter, and construction for the exact body style. Available choices also range from blackwall to whitewall presentations, with both period-style bias-ply options and modern radial alternatives worth considering before the car goes back on the road.
Which Tire Size Is Right for The 1967 Fiat 1800
The 1967 Fiat 1800 uses four primary tire sizes across two sub-models, with both 14-inch and 15-inch rim diameters represented. The first step is confirming whether the car is a B Sedan or a Wagon, because that determines both the wheel diameter and the correct radial or bias-ply size family to evaluate before choosing a specific tire style or brand.
165R15 is a Euro-metric radial size in which 165 refers to nominal section width in millimeters, R indicates radial construction, and 15 identifies a 15-inch rim diameter. On the 1967 Fiat 1800, this size belongs with the B Sedan rather than the wagon fitment. Available choices include blackwall, narrow whitewall, and wide whitewall designs from brands such as Coker Classic, American Classic, Firestone, BFGoodrich, Michelin, and Vredestein across several tire series. This size suits owners who want a radial tire in the sedan’s 15-inch fitment while still choosing the appearance and brand character that best matches the car.
590-15 is a numeric bias-ply size where 5.90 represents the nominal section width in inches and 15 refers to the rim diameter. For the 1967 Fiat 1800, it is the bias-ply 15-inch fitment associated with the B Sedan and gives the car a more traditional construction and period-style presentation. Product choices include blackwall and wide whitewall versions, with BFGoodrich offerings in the Silvertown Classic Bias Ply series and an Avon Turbospeed Mk4 option. This size is the right starting point for sedan owners who want to stay with a vintage bias-ply look rather than move to a radial alternative.
175R14 is a Euro-metric radial size in which 175 is the nominal section width in millimeters, R identifies radial construction, and 14 is the rim diameter. On the 1967 Fiat 1800, this size is tied to the Wagon and should not be confused with the sedan’s 15-inch fitments. Available products center on blackwall radial designs from Michelin and Vredestein, including XAS, Sprint Plus, and Sprint Classic series. This size is the correct path for wagon owners using the 14-inch radial setup and comparing among touring-oriented radial tire lines.
6.40-14 is a numeric bias-ply size where 6.40 describes nominal section width in inches and 14 identifies the wheel diameter. For the 1967 Fiat 1800, this is the wagon’s bias-ply 14-inch fitment, making it distinct from both sedan sizes and from the wagon’s radial alternative. Its practical relevance is preserving the older bias-ply sizing convention and the traditional look that often matters on a restoration-oriented car. Wagon owners considering this size should confirm that the vehicle still carries the correct 14-inch wheel setup and decide whether they want a vintage-style bias-ply presentation or a radial construction instead.
Sub-model fitment matters on the 1967 Fiat 1800 because the B Sedan and Wagon do not share the same wheel diameter or tire sizes. Identifying the exact body style is the first step before comparing bias-ply and radial options or narrowing down sidewall and brand choices.
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1967 Fiat 1800 B Sedan
The 1967 Fiat 1800 B Sedan uses 15-inch tire fitments, with a choice between 165R15 radial and 590-15 bias-ply sizing. That gives sedan owners a clear split between a modern radial format and a traditional numeric bias-ply presentation when selecting tires for appearance and road use.
The 1967 Fiat 1800 Wagon uses 14-inch tire fitments rather than the sedan’s 15-inch setup, with 175R14 radial and 6.40-14 bias-ply sizes associated with it. Tire selection starts with confirming the wagon’s wheel diameter, then deciding whether to stay with the bias-ply style or use the radial option.
Bias-Ply to Radial Tire Conversion for the 1967 Fiat 1800
For the 1967 Fiat 1800, the original 590-15 bias-ply size has three radial-equivalent options. Those alternatives are 165R15 as an 80-series metric radial, P165/75R15 as a 75-series P-metric radial, and P175/70R15 as a 70-series P-metric radial. Together they cover different sizing conventions and profile families while remaining tied to the same 15-inch wheel diameter. A recommended rim-width range of 4 to 5 inches applies to this equivalent group, and wheel width plus vehicle clearance should be checked before changing sizes or construction.
Modern Radial Equivalents
165R15
Equivalent 80-series Metric Radial (590-15)
P165/75R15
Equivalent P-metric 75-series Radial (590-15)
P175/70R15
Equivalent P-metric 70-series Radial (590-15)
Important Considerations When Replacing Bias Ply With Radial
Compare overall diameter and section width carefully to ensure proper fit.
Verify recommended rim range (4-5 in) and load needs match your vehicle specifications.
Check fender clearance, steering clearance, and stance before installation.
Consider suspension condition and intended road use when choosing equivalents.
Important Fitment Notes
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 1967 Fiat 1800 Tires for Sale
Available 1967 Fiat 1800 tire choices span radial and bias-ply constructions, with brands including Coker Classic, American Classic, Firestone, BFGoodrich, Michelin, Avon, and Vredestein. Buyers can compare blackwall, narrow whitewall, and wide whitewall styles along with series such as XAS, XZX, Sprint Classic, Snow Classic, and Silvertown Classic Bias Ply.
These 1967 Fiat 1800 FAQs focus on the questions owners usually need answered first: correct tire size by sub-model, 14-inch versus 15-inch wheel fitment, bias-ply versus radial choices, appearance differences, and the basic checks worth making before road use.
Tire Size & Fitment
What tire size fits a 1967 Fiat 1800?
The 1967 Fiat 1800 does not use one universal tire size across every sub-model. The B Sedan uses 165R15 in radial form or 590-15 in bias-ply form, while the Wagon uses 175R14 in radial form or 6.40-14 in bias-ply form.
The practical decision starts with identifying whether the car is a B Sedan or a Wagon, because that also determines whether the wheel diameter is 15 inches or 14 inches. After that, the next choice is whether the car will stay with its traditional bias-ply size or move to the corresponding radial fitment used with that sub-model.
What size rim does a 1967 Fiat 1800 use?
A 1967 Fiat 1800 can use either a 15-inch rim or a 14-inch rim, depending on the sub-model. The B Sedan is tied to 15-inch tire sizes, while the Wagon is tied to 14-inch tire sizes.
That makes wheel confirmation especially important before ordering tires, since a 14-inch and a 15-inch fitment are not interchangeable simply because the car shares the same model name. Checking the actual wheel diameter on the car matters even more if the Fiat has had replacement wheels fitted at some point in its life.
Do all 1967 Fiat 1800 sub-models use the same tire size?
No. The 1967 Fiat 1800 B Sedan and the 1967 Fiat 1800 Wagon use different tire sizes and different rim diameters. The sedan uses 15-inch sizes, while the wagon uses 14-inch sizes, and each sub-model appears with both a radial and a bias-ply size option.
That difference means the exact sub-model should be confirmed before comparing brands, sidewall styles, or tire series. Once the body style is settled, the buyer can focus on the more detailed decision of whether to keep the car in a traditional bias-ply size format or select the radial fitment associated with that same sub-model.
Bias-Ply & Radial Options
Is 590-15 a bias-ply or radial tire for the 1967 Fiat 1800?
590-15 is a bias-ply tire size for the 1967 Fiat 1800 B Sedan. It is the sedan’s traditional numeric bias-ply fitment and differs from 165R15, which is the sedan’s radial fitment in Euro-metric format.
That distinction matters because staying with 590-15 keeps the car in a vintage bias-ply size convention, while moving to a radial means evaluating a different size format on the same 15-inch wheel diameter. Owners should also confirm wheel width and overall vehicle setup before converting, rather than assuming every 15-inch wheel will suit every alternative equally well.
What radial tire sizes are equivalent to 590-15?
Radial equivalents for 590-15 include 165R15 as an 80-series metric radial, P165/75R15 as a 75-series P-metric radial, and P175/70R15 as a 70-series P-metric radial. These options keep the discussion within 15-inch radial alternatives for the original 590-15 bias-ply size.
Each equivalent uses a different sizing convention, so the choice is not only about switching from bias-ply to radial but also about selecting the radial format you want to run. A 4 to 5 inch rim-width range is relevant to this equivalent group, and wheel compatibility plus clearance should be verified before any conversion is treated as suitable for the car.
Should I use bias-ply or radial tires on a 1967 Fiat 1800?
A 1967 Fiat 1800 can be approached either way, depending on the sub-model and the owner’s goals. The B Sedan has both 590-15 bias-ply and 165R15 radial fitments, while the Wagon appears with 6.40-14 bias-ply and 175R14 radial fitments.
Bias-ply sizing usually appeals to owners seeking a more traditional visual presentation, while radial sizing often appeals to owners who want to stay with the radial fitment associated with the car’s wheel setup. The key is to match the correct sub-model and wheel diameter first, then evaluate whether appearance, driving use, and wheel compatibility support one construction choice over the other.
Choosing the Right Tire
What should I consider when choosing a 165R15 tire for a 1967 Fiat 1800?
A 165R15 tire for a 1967 Fiat 1800 belongs with the B Sedan, so the first consideration is confirming that the car is the sedan and that it still has the correct 15-inch wheel setup. After that, construction is already settled because 165R15 is the radial fitment in this application.
Selection then comes down to details such as blackwall versus whitewall appearance, preferred brand, tire series, and wheel-width compatibility. Options in this size include products from Coker Classic, American Classic, Firestone, BFGoodrich, Michelin, and Vredestein, so the buyer can compare appearance and specification character without changing away from the sedan’s radial size.
What sidewall styles are available for 1967 Fiat 1800 tires?
1967 Fiat 1800 tire choices include blackwall, narrow whitewall, and wide whitewall sidewall styles, depending on the tire size and product line. The broadest variety appears in 165R15, while 590-15 includes blackwall and wide whitewall options, and the 14-inch radial choices shown for the wagon are blackwall.
Sidewall style changes the car’s visual character more than many buyers expect, especially on a 1960s European sedan or wagon. A whitewall can give the car a more formal restoration-oriented look, while blackwall keeps the presentation simpler and often sportier, so the best choice depends on whether the Fiat is being finished for period-style appearance or regular road use.
What brands offer tires for the 1967 Fiat 1800?
Tires for the 1967 Fiat 1800 are available from Coker Classic, American Classic, Firestone, BFGoodrich, Michelin, Avon, and Vredestein. Brand availability depends on the tire size, with the largest assortment appearing in 165R15 and smaller groups tied to 590-15 and 175R14.
Brand choice should be considered alongside size, construction, sidewall style, and tire series rather than as a separate decision. A buyer comparing products for a sedan may see a wide spread of whitewall and blackwall radial options, while someone choosing a wagon radial or a 590-15 bias-ply fitment will be working from a narrower but still meaningful group of offerings.
Restoration & Appearance
Which tire should I choose for a period-style 1967 Fiat 1800?
For a period-style 1967 Fiat 1800, the starting point is the correct size and wheel diameter for the specific sub-model. That usually means choosing between the sedan’s 590-15 bias-ply or 165R15 radial fitment, or the wagon’s 6.40-14 bias-ply or 175R14 radial fitment, depending on how traditional or updated the presentation should be.
A bias-ply size often supports the most vintage-looking overall effect, while a radial in the correct sub-model fitment can still preserve a classic appearance, especially with an appropriate sidewall treatment. When exact originality matters, comparing the car against marque references, period photography, or restoration records is the safest way to narrow the final appearance choice.
How does tire construction affect the appearance of a restored 1967 Fiat 1800?
Tire construction changes the look of a restored 1967 Fiat 1800 because bias-ply and radial sizes present the car differently even when they serve the same general wheel diameter. The sedan’s 590-15 bias-ply and 165R15 radial pairing is the clearest example, with one using a vintage numeric format and the other a modern Euro-metric radial format.
That visual difference often matters as much as the mechanical fitment. A bias-ply choice tends to suit owners chasing a more traditional stance and period flavor, while a radial can give the car a more modernized yet still classic appearance, especially when blackwall, narrow whitewall, or wide whitewall options are matched carefully to the overall restoration theme.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1967 Fiat 1800?
Yes. Modifications can affect tire fitment on a 1967 Fiat 1800 even when the tire size itself is correct for the original sub-model. Changes to wheel width, wheel offset, suspension height, springs, or body clearance can all alter how much space the tire has once it is mounted and loaded.
That is especially important here because the car already spans both 14-inch and 15-inch fitments depending on body style. A Fiat with aftermarket wheels or altered suspension should have actual wheel dimensions and clearances checked before a new tire is chosen, particularly when moving between bias-ply and radial constructions or when considering an equivalent radial size.
What should I inspect before driving a 1967 Fiat 1800 on new tires?
Before driving a 1967 Fiat 1800 on new tires, inspect the wheels for damage, confirm the rim diameter and width match the intended tire size, and make sure the tires are inflated properly for the setup being used. It also helps to check valve stems, wheel hardware, and visible suspension condition before the first road test.
A short, careful initial drive is a smart way to confirm there is no rubbing during steering, braking, or suspension movement. On a collector-era car, it is also worth checking for uneven stance, old alignment issues, or brake pull, since fresh tires can highlight problems that were less noticeable when the previous tires were worn or aged.
How should 1967 Fiat 1800 tires be maintained for collector-car use?
Collector-car tire maintenance for a 1967 Fiat 1800 starts with regular pressure checks, routine inspection for cracking, cuts, bulges, and uneven wear, and keeping the car on the correct tire size for its sub-model. Low-use cars still need attention because age and storage conditions can matter as much as mileage.
Good storage habits help preserve both bias-ply and radial tires, especially if the Fiat spends long periods parked indoors. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources is useful, and the tires should be inspected before longer drives so any slow air loss, sidewall deterioration, or clearance issue is caught before road use.
