1961 Fairthorpe Electron Tires

The 1961 Fairthorpe Electron uses two primary tire sizes: 560-15 in bias-ply construction and 155R15 in radial construction. Both are 15-inch fitments, so the main distinction is not wheel diameter but tire type, sizing format, and the overall approach you want for the car.

That means the first decision is whether the Electron will stay with a traditional bias-ply setup or use a radial-size alternative. Wheel width, tire clearance, and the car's current wheel and suspension configuration should be confirmed before choosing between the two, especially if the car has been changed from stock over the years.

The 1961 Fairthorpe Electron uses a 15-inch rim diameter with both of its primary tire sizes. That applies to the 560-15 bias-ply size and the 155R15 radial size, so either route keeps the car on the same basic wheel diameter.

Rim diameter is only part of the fitment picture, though. Tire choice should also account for wheel width, since the available radial and bias-ply products do not all share the same rim-width specifications. Measuring the actual wheels on the car is worthwhile, particularly on a low-volume specialty vehicle that may have seen wheel changes during its life.

560-15 is a vintage numeric bias-ply size. The 560 refers to a nominal section width of about 5.60 inches, and the 15 refers to the wheel diameter in inches. On the 1961 Fairthorpe Electron, it represents the traditional bias-ply fitment rather than a modern metric radial size.

That matters because a numeric bias-ply size carries a different construction style and visual character than a metric radial. Buyers usually choose 560-15 when they want a more period-style look, with options such as blackwall, narrow whitewall, or wide whitewall. It is still important to confirm wheel width and compare the car's actual setup before ordering.

560-15 is the bias-ply tire size used on the 1961 Fairthorpe Electron. It is the vintage numeric-size fitment and represents the more traditional construction choice for this car, compared with the 155R15 radial alternative that also appears in the Electron's fitment picture.

Choosing 560-15 usually comes down to retaining a period-style look and staying with a classic bias-ply construction. Owners should still compare the actual wheel width and the car's present suspension and body clearances, especially if the Electron has been modified or if the existing wheels are not the original type.

Radial equivalents for 560-15 include 155R15 as an 80-series metric radial and 560R15 as a bias-look radial equivalent. Those are two different approaches: one uses a modern Euro-metric radial format, while the other keeps a more traditional visual theme while changing construction.

A recommended rim-width range of 4 to 5 inches is associated with these equivalents, which helps frame the wheel check before conversion. Even with the same 15-inch rim diameter, a radial equivalent should be treated as an alternative size choice rather than an automatic swap, so overall dimensions and clearance still deserve careful review.

That depends on how the 1961 Fairthorpe Electron is being used and how closely the owner wants to stay with a traditional presentation. The car supports both a 560-15 bias-ply route and a 155R15 radial route, so the decision is really about construction style as much as size.

Bias-ply tires usually appeal to owners focused on vintage appearance, while radial choices may suit drivers who want a more modern tire format on the road. The better answer comes from confirming wheel width, checking available clearance, and deciding whether the car is being finished for restoration-minded display, regular driving, or a balance between the two.

Start with the fact that 560-15 is the bias-ply fitment path for the 1961 Fairthorpe Electron. From there, the important choices are sidewall style, tire series, brand, and wheel compatibility. In this size, available products include blackwall, narrow whitewall, and wide whitewall options from several brands.

The right choice depends on how the car is meant to look and how its 15-inch wheels are configured. Some 560-15 products are intended for a narrow fixed rim width, while others cover a broader width range. Comparing rim specification, load figures where stated, and the intended use of the car will narrow the field quickly.

The 1961 Fairthorpe Electron has meaningful sidewall variety depending on size and construction. The 155R15 radial options are blackwall, while the 560-15 bias-ply choices include blackwall, narrow whitewall, and wide whitewall treatments across different brands and tire series.

That gives the car very different visual directions without changing the basic 15-inch fitment. A blackwall radial leans toward a cleaner, more understated presentation, while the whitewall bias-ply options create a stronger vintage look. Sidewall choice should be made alongside tire size and construction, not treated as a separate cosmetic decision.

Tires for the 1961 Fairthorpe Electron are available from Firestone, Michelin, Avon, Vredestein, US Royal, Coker Classic, and Pro-Trac. Those brands are spread across the car's 155R15 radial and 560-15 bias-ply sizes, so brand choice is tied closely to the construction and appearance direction you want.

A useful way to compare them is by looking beyond the name on the sidewall. Tire series, sidewall treatment, rim-width specification, and stated load figures where available will usually matter more in final selection than brand alone. Once the correct size path is chosen, those details help narrow the best-matched option for the car.

For a period-style 1961 Fairthorpe Electron, the 560-15 bias-ply size is the natural starting point because it preserves the vintage sizing format and construction associated with the car's era. Within that size, blackwall, narrow whitewall, and wide whitewall options create different restoration-oriented looks.

The most appropriate choice depends on the specific presentation the car is meant to have, rather than on a single universal answer. If exact originality matters, marque references and period photos are worth consulting before settling on a sidewall treatment. Wheel width and the car's actual stance should still be checked before final selection.

Tire construction changes the overall visual character of a restored 1961 Fairthorpe Electron more than many owners expect. A 560-15 bias-ply gives the car a more traditional vintage presentation, while a 155R15 radial moves it toward a later-style radial look even though the rim diameter remains 15 inches.

That difference becomes more noticeable on a lightweight British specialty car where the tires are a visible part of the stance. Owners trying to preserve a stronger early-1960s feel often begin with the bias-ply size, while those balancing appearance with radial construction may look at 155R15 or a 560R15 bias-look radial alternative.

Yes, modifications can affect tire fitment on a 1961 Fairthorpe Electron even when the car stays within its 15-inch wheel diameter. Changes such as aftermarket wheels, altered wheel width, suspension adjustments, ride-height changes, or body modifications can all influence how either 560-15 or 155R15 sits in the car.

That is especially important on a compact specialty sports car with limited room around the tire. A car that has been lowered, widened, or re-wheeled should be measured rather than assumed correct by size code alone. Steering clearance, fender clearance, and the actual wheel dimensions deserve verification before choosing a replacement tire.

Before driving a 1961 Fairthorpe Electron on new tires, inspect the wheels for correct diameter and width, make sure the tires are seated properly, and check inflation pressure carefully. It is also wise to confirm that the tires clear the fenders, suspension, and steering components through the full range of motion.

Collector cars often sit for long periods, so the rest of the running gear deserves attention too. Worn bushings, weak springs, old brake components, or loose steering parts can affect how a fresh set of tires behaves on the road. A short, cautious shakedown drive is a sensible final check after installation.

560-15 tires on a collector 1961 Fairthorpe Electron should be maintained with regular pressure checks, visual inspections, and clean storage conditions. Sidewall cracking, cuts, bulges, uneven wear, and slow air loss are all worth watching closely, especially on a car that spends more time parked than driven.

Bias-ply collector tires also benefit from being kept away from prolonged sunlight, moisture, and ozone-producing equipment during storage. The car should be inspected before each road outing rather than only by calendar interval. Even a lightly used tire can age materially, so condition matters just as much as remaining tread depth.