1967 Triumph GT6 Tires

The 1967 Triumph GT6 is associated with two tire sizes: 560-13 in bias-ply construction and 155R13 in radial construction. Both sizes use a 13-inch rim, but they belong to different sizing systems and represent two different approaches to equipping the car.

That means the first step is deciding whether the GT6 is staying with a traditional bias-ply presentation or using the radial fitment. The actual wheel width on the car should also be checked, especially if the wheels have been changed over the years, because the available bias-ply and radial products do not share the same rim-width ranges.

The tire fitments associated with a 1967 Triumph GT6 use a 13-inch rim diameter. Both the 560-13 bias-ply size and the 155R13 radial size are built for 13-inch wheels, so rim diameter stays consistent even though the tire constructions differ.

Rim diameter is only part of the check. Wheel width matters too, because the available 560-13 bias-ply options are built around narrower rims than the 155R13 radial products. A GT6 that has replacement wheels, aftermarket steel wheels, or older restorations should have the wheel measured before settling on either tire path.

560-13 is a vintage numeric bias-ply size. The 560 portion refers to a nominal section width of about 5.60 inches, and the 13 identifies the wheel diameter in inches. On a 1967 Triumph GT6, it represents the bias-ply fitment rather than a modern metric radial size.

That older size format matters because it points you toward a traditional bias-ply tire, not just any 13-inch tire. Owners considering a switch from 560-13 to a radial alternative should compare wheel width, overall tire dimensions, and clearance carefully, since an equivalent radial is an alternative to evaluate rather than an automatic one-for-one substitute.

On the 1967 Triumph GT6, 560-13 is a bias-ply tire size. It uses the older numeric sizing format and is offered in classic bias-ply series with whitewall sidewall treatments, which gives it a distinctly traditional appearance on a small British sports coupe.

Choosing 560-13 usually means keeping the car in a period-style construction and a narrower wheel-width range than the radial alternatives. Owners should still confirm the wheels on the car, because many vintage imports have been changed over time, and the best fitment decision depends on both the current wheel setup and the intended look.

Radial equivalents for 560-13 include 155R13, P155/75R13, and P155/70R13. In that group, 155R13 is the 80-series metric radial equivalent, P155/75R13 is the P-metric 75-series option, and P155/70R13 is the P-metric 70-series alternative.

Those sizes give the GT6 owner more than one radial direction, but they should be treated as alternatives to compare rather than automatic substitutions. A recommended rim-width range of 4 to 5 inches is associated with the equivalents, and the final choice should be checked against the car's wheel width, overall dimensions, and available clearance.

Start by confirming the wheel diameter and actual wheel width, then compare the intended radial size against the current 560-13 setup. For the 1967 Triumph GT6, radial alternatives tied to 560-13 include 155R13, P155/75R13, and P155/70R13, all of which should be evaluated on the correct 13-inch wheel.

The next checks are steering clearance, fender clearance, and the condition of suspension and steering components, since an older GT6 may no longer sit exactly as it did when new. A car with changed wheels, altered ride height, or previous restoration work deserves an especially careful fitment review before converting from bias-ply to radial construction.

The main considerations are construction, sidewall style, brand, and wheel compatibility. In 560-13, the 1967 Triumph GT6 has bias-ply options from BFGoodrich and Firestone, with narrow whitewall and wide whitewall treatments available across classic bias-ply series.

That makes 560-13 less about finding the size and more about deciding how traditional the car should look and which wheel width it actually has. BFGoodrich 560-13 options are built around 3.50 to 4.00-inch rims, while the Firestone 560-13 option uses a 4.00 to 4.50-inch rim range, so wheel measurement matters before choosing.

The available sidewall styles depend on which tire size path you choose. In 155R13 radial form, the GT6 uses blackwall tires. In 560-13 bias-ply form, available sidewall styles include narrow whitewall and wide whitewall options.

That split makes sidewall treatment an important part of the overall presentation. A blackwall radial keeps the look restrained and sports-car oriented, while whitewall bias-ply tires create a more overtly vintage appearance. Matching the sidewall to the car's restoration style, wheel design, and trim presentation usually leads to a more satisfying final result.

Michelin and Dunlop offer radial choices for the 1967 Triumph GT6 in the 155R13 range, while BFGoodrich and Firestone offer 560-13 bias-ply options. The available tire series include Michelin XAS-FF, SP Sport Aquajet, Silvertown Classic Bias Ply, and Firestone Classic Bias Ply.

Brand choice should come after the fitment decision, not before it. Once the car is set on either the radial or bias-ply path, compare the available series, sidewall styles, and rim-width specifications within that size. That approach keeps the selection grounded in correct fitment and the appearance goals for the GT6.

For a period-style 1967 Triumph GT6, the 560-13 bias-ply fitment is the more traditional visual starting point. It uses the older numeric sizing convention and is available in classic bias-ply series with narrow whitewall and wide whitewall sidewall treatments.

The best choice within that size depends on how restrained or how vintage you want the finished car to look. Owners pursuing exact historical accuracy should compare the selected sidewall treatment against marque references, period photos, or restoration records, because period-style appearance and exact original delivery appearance are not always the same thing.

Tire construction changes the visual character of a restored 1967 Triumph GT6 more than many owners expect. A 560-13 bias-ply keeps the car in a traditional vintage size format, while a 155R13 radial introduces a later-style metric presentation with blackwall-only product choices in the available assortment.

That difference affects how the car reads at a glance, especially on a compact coupe with relatively small 13-inch wheels. Bias-ply construction usually suits a more restoration-oriented look, while the radial path tends to look more understated and road-focused. The right answer depends on whether the GT6 is being finished for authenticity, touring, or a blended approach.

Yes. Wheel changes, suspension work, ride-height alterations, and body or fender repairs can all affect tire fitment on a 1967 Triumph GT6, even when the tire size itself is correct. That matters with both 560-13 bias-ply tires and 155R13 radial tires because each setup carries its own wheel-width expectations.

A GT6 with aftermarket wheels or earlier restoration work should have the actual wheel measured and the car checked for steering and fender clearance before new tires go on. Looking at lock-to-lock clearance in front and compression clearance in the wheel openings helps avoid selecting a size or construction that creates preventable interference.

Before driving, inspect wheel condition, lug hardware, valve stems, tire pressure, and visible clearance around the suspension and body. On a 1967 Triumph GT6, it also makes sense to verify that the tires match the intended wheel width and that there is no contact at full steering lock.

Collector cars often sit for long periods, so the tire check should be paired with a broader look at aging rubber parts, alignment condition, and any signs of uneven ride height. A short test drive followed by a second inspection for rubbing, air loss, or abnormal wear is a smart final step before regular road use.

Collector-car tire maintenance starts with regular pressure checks, visual inspections, and protection from long periods of heat, sunlight, moisture, and ozone exposure. Whether the 1967 Triumph GT6 is running 560-13 bias-ply tires or 155R13 radials, tread depth alone is not enough to judge condition on a low-mileage car.

Sidewall cracking, flat spotting from storage, bulges, cuts, and slow air loss are all worth watching for between drives. Moving the car periodically, storing it on a clean surface, and inspecting the tires before each outing helps preserve both appearance and safety. Any tire showing age-related deterioration deserves professional evaluation before continued use.