1970 Triumph Spitfire Tires

The 1970 Triumph Spitfire is associated with two tire sizes: 560-13 in bias-ply construction and 155R13 in radial construction. Both sizes use a 13-inch rim, so the fitment question is less about wheel diameter and more about which construction and sizing format best matches the car's current setup and intended use.

A Spitfire kept close to a vintage presentation may lean toward 560-13, while a road-driven car may be set up around 155R13. The next step is to confirm the wheel width, check whether the car still has its original-style wheel setup, and compare the tire's appearance and construction to the way the car will actually be driven.

The tire sizes associated with the 1970 Triumph Spitfire both fit a 13-inch rim. That applies to the 560-13 bias-ply size and the 155R13 radial size, so rim diameter stays consistent even though the tire construction and sizing systems differ.

Rim diameter alone does not settle the fitment decision, because wheel width still matters when choosing among available tires or considering a radial equivalent. Measuring the actual wheel on the car is especially worthwhile if it has been restored, modified, or fitted with replacement wheels at some point in its life.

Yes. The 1970 Triumph Spitfire Base is associated with the same two tire-size paths for this model year: 560-13 in bias-ply construction and 155R13 in radial construction. That means the Base model does not introduce a separate wheel diameter or a different primary fitment pattern.

The practical choice still comes down to how the car is being equipped today. Owners comparing tires for a Base model should focus on construction type, sidewall appearance, and wheel-width compatibility rather than looking for a different sub-model-specific size that changes the overall fitment story.

560-13 is a bias-ply tire size for the 1970 Triumph Spitfire. It uses the older numeric sizing system, and the available 560-13 options for this application are bias-ply tires from BFGoodrich and Firestone in traditional vintage-style series and whitewall treatments.

That makes 560-13 the more traditional-looking fitment path for an owner who wants a distinctly vintage tire presentation. A change from 560-13 to a radial alternative should be approached as a conversion decision, with attention given to wheel width, clearance, and whether the car's steering and suspension condition suit the change in construction.

Radial equivalents for 560-13 on a 1970 Triumph Spitfire include 155R13 as an 80-series metric radial, P155/75R13 as a 75-series P-metric radial, and P155/70R13 as a 70-series P-metric radial. These options all stay within the 13-inch wheel family while offering different radial sizing conventions.

The recommended rim-width range for those equivalents is 4 to 5 inches, which makes wheel measurement an important part of the decision. Each equivalent should also be checked against the car's overall setup, since matching rim diameter does not by itself confirm that every radial alternative will suit the existing wheel and clearance conditions.

Either construction can be appropriate for a 1970 Triumph Spitfire, depending on the way the car is being used and presented. The main bias-ply fitment path is 560-13, while 155R13 represents the radial path for this model year and keeps the car on a 13-inch rim.

A restoration-oriented car may favor bias-ply for a more traditional look, while a regularly driven Spitfire may lead an owner toward the radial size family. The best approach is to match the tire to the car's wheel width, intended appearance, and actual driving use rather than treating either construction as automatically right for every Spitfire.

Start by deciding whether the car should stay with a traditional bias-ply presentation or use a radial-style fitment. On a 1970 Triumph Spitfire, that means comparing 560-13 bias-ply tires against 155R13 radial tires, both built around a 13-inch rim but differing in sizing format, construction, and product style.

After construction choice, compare the actual wheel width, sidewall appearance, and the way the car will be driven. A show-focused or period-style Spitfire may point one way, while a road-driven car may point another. Available product details such as rim-width range, load information, and tire series help narrow the decision responsibly.

The available sidewall styles for 1970 Triumph Spitfire tires include blackwall, narrow whitewall, and wide whitewall. The radial 155R13 options are blackwall tires, while the 560-13 bias-ply choices include both narrow whitewall and wide whitewall treatments depending on brand and tire series.

That sidewall variation matters because it changes the car's visual character more than many buyers expect on a small British sports car. Choosing between blackwall and whitewall is usually an appearance decision first, but it should still be made within the correct tire size and construction path for the wheel setup currently on the car.

Michelin, Dunlop, BFGoodrich, and Firestone all offer applicable tires for the 1970 Triumph Spitfire. Michelin and Dunlop cover the 155R13 radial side of the fitment, while BFGoodrich and Firestone supply 560-13 bias-ply options with vintage-style sidewall treatments.

Brand choice should be weighed alongside tire series, sidewall style, and wheel compatibility rather than treated as the only decision. A buyer comparing products for this Spitfire will usually get the clearest answer by first selecting the correct construction path, then comparing how each brand's available tire presentation fits the car's intended look and use.

For a period-style 1970 Triumph Spitfire, the 560-13 bias-ply size is the most traditional-looking starting point because it keeps the vintage numeric sizing format and bias-ply construction. Available options in this size include BFGoodrich and Firestone tires with whitewall treatments that can create a distinctly classic presentation.

A radial 155R13 can still suit a restoration-minded car if road use and classic radial appearance matter more than a bias-ply look. When exact originality is important, tire choice should be checked against marque references or period documentation, since a correct size alone does not prove that a specific sidewall treatment matches the car's original delivery.

Tire construction changes the look of a restored 1970 Triumph Spitfire as much as it changes the sizing language on the sidewall. A 560-13 bias-ply tire gives the car a more traditional vintage presentation, while a 155R13 radial introduces a later-style metric format and a more modern visual impression.

Sidewall treatment adds another layer to that decision. Blackwall radials keep the appearance restrained, while narrow whitewall or wide whitewall bias-ply tires create a more decorative period-style look. Matching the tire's visual character to the way the car is restored usually produces a better result than choosing by size code alone.

Yes. Modifications can affect tire fitment on a 1970 Triumph Spitfire even when the nominal tire size appears correct. Aftermarket wheels, suspension changes, altered ride height, or body and fender work can all change the space available around a 560-13 or 155R13 tire.

That is why the actual wheel diameter and width should be confirmed before choosing a tire, especially if the car has changed hands several times. Steering clearance at full lock and visible space around the tire are also worth checking, since a classic sports car's compact wheel openings leave less room for assumption.

Before driving a 1970 Triumph Spitfire on new tires, inspect the wheels for damage or excessive corrosion, confirm that the tire size matches the intended wheel setup, and make sure the tires are properly mounted and inflated. Lug hardware, valve stems, and overall tire seating deserve attention before the car goes back on the road.

A short initial drive should be followed by another look at air pressure and general clearance around the front suspension and bodywork. On an older sports car, it also makes sense to inspect steering and suspension condition, because worn components can affect how a fresh set of tires behaves once the car is moving again.

Collector-car tires on a 1970 Triumph Spitfire should be maintained with regular pressure checks, periodic visual inspection, and careful storage habits. Whether the car wears 560-13 bias-ply tires or 155R13 radials, low annual mileage does not prevent age-related issues such as cracking, flat spotting, air loss, or sidewall deterioration.

Keeping the car away from prolonged sunlight, moisture, and ozone sources helps preserve the tires between drives. It is also wise to inspect tread surfaces and sidewalls before each outing, since a lightly used vintage car can sit long enough for condition problems to develop even when the tires still look serviceable at a glance.