1966 Toyota Tiara Tires

The 1966 Toyota Tiara uses two primary tire sizes: 560-13 and 590-13. Both are bias-ply sizes designed for 13-inch rims, and both are associated with the Tiara 1900. That means the correct choice is not determined by make and model alone, because the car may be set up for either of these two sizes.

A replacement decision should begin by reading the size on the tire currently installed and confirming the wheel dimensions on the car. Since both sizes are legitimate Tiara fitments, choosing between them comes down to matching the vehicle's actual setup, then selecting the sidewall style and construction approach that best suits restoration goals and driving plans.

The 1966 Toyota Tiara uses a 13-inch rim with both of its primary tire sizes, 560-13 and 590-13. The final number in each size code identifies the rim diameter, so both fitments are built around the same wheel diameter even though the tire widths differ.

Rim diameter is only one part of the fitment picture, so wheel width should also be checked before choosing a tire. Product options in these sizes use different rim-width ranges, and that matters whether the goal is a period-style bias-ply replacement or a radial equivalent on a collector car that may no longer be wearing its original wheels.

On a 1966 Toyota Tiara, 560-13 is a numeric bias-ply tire size. The 5.60 designation refers to the tire's nominal section width in inches, while the 13 indicates the wheel diameter. It is an older sizing system commonly seen on compact and imported cars from the period.

Understanding that format helps when comparing a bias-ply replacement to modern radial equivalents, because the replacement may use a completely different size code even when it serves the same general fitment role. Once the original size is confirmed, the next step is choosing the right whitewall style, brand, and wheel-width compatibility for the Tiara's actual setup.

For the 1966 Toyota Tiara, 560-13 is a bias-ply tire size. It is one of the primary original-style fitments used on the car and belongs to the older numeric sizing system rather than a modern radial format. Buyers keeping a traditional presentation usually start by looking at bias-ply products in this exact size.

A radial alternative can still be considered, but it should be treated as an equivalent rather than the same tire. The practical decision comes down to how the Tiara will be used, whether the goal is restoration-oriented appearance, and whether the wheel width and overall vehicle setup are suitable for the construction and size being considered.

Radial equivalents for 560-13 include 155R13, P155/75R13, and P155/70R13. Radial equivalents for 590-13 include 165R13, P165/75R13, and P175/70R13. In each group, the first option is an 80-series metric radial, the second is a 75-series P-metric radial, and the third is a 70-series P-metric radial.

These equivalents provide several modern radial sizing paths, but they are not automatic replacements. Wheel width, tire dimensions, and clearance around the fenders and suspension should be reviewed before making a change, especially on a vintage sedan that may have different wheels or suspension parts than it did when new.

A bias-ply-to-radial conversion on a 1966 Toyota Tiara starts with confirming the original tire size, then matching it to the proper radial equivalent. For 560-13, the equivalent choices are 155R13, P155/75R13, and P155/70R13. For 590-13, they are 165R13, P165/75R13, and P175/70R13.

Wheel width is especially important here, since the suggested rim width range for these equivalents is 4 to 5 inches. It also makes sense to inspect fender and steering clearance, verify the condition of suspension and alignment components, and compare the proposed radial to the wheel and overall stance already present on the car.

Start with the exact tire size already used on the car, because the 1966 Toyota Tiara is associated with both 560-13 and 590-13. Both are bias-ply sizes for 13-inch rims, but they are not the same fitment. Once the correct size is confirmed, the next comparison points are construction style, sidewall appearance, and wheel-width compatibility.

A buyer restoring a period-style sedan may focus on preserving the traditional look of a bias-ply tire, while a driver considering more regular road use may also compare radial equivalents. Product details such as rim-width range, load capacity, and whitewall treatment help narrow the choice without drifting away from the Tiara's correct size category.

The available sidewall styles for 1966 Toyota Tiara tires include narrow whitewall and wide whitewall treatments. In 560-13, both narrow whitewall and wide whitewall options are available. In 590-13, the available product uses a wide whitewall presentation, which keeps the selection more appearance-focused than performance-focused.

Sidewall style has a strong effect on the finished look of a compact 1960s sedan, especially when the tire profile and wheel diameter remain close to period specification. The best choice depends on whether the goal is a subtle vintage appearance or a more pronounced whitewall statement, while still staying with the correct size for the car's wheel setup.

The 1966 Toyota Tiara tire selection includes BFGoodrich and Firestone in the applicable bias-ply sizes. BFGoodrich appears in both 560-13 and 590-13 offerings, while Firestone is available in 560-13. The available tire series include Silvertown Classic Bias Ply and Firestone Classic Bias Ply.

Brand choice is best treated as one part of a larger fitment decision rather than the first decision. Once the correct size is established, compare the available brand options by sidewall style, rim-width range, and overall presentation so the tire matches both the Tiara's wheel setup and the type of restoration or road use planned.

A period-style 1966 Toyota Tiara usually starts with one of its original-style bias-ply sizes, 560-13 or 590-13, depending on the wheel and tire setup already on the car. Staying with a bias-ply tire preserves the older sizing convention and visual character that suit a mid-1960s imported sedan better than an obviously modern replacement.

After size is confirmed, the appearance decision centers on details such as narrow whitewall versus wide whitewall and the overall look of the tire series being considered. Buyers seeking strict historical accuracy should compare the car's build era, existing photographs, and marque-specific restoration references before settling on a particular sidewall treatment.

Tire construction changes the visual character of a restored 1966 Toyota Tiara more than many buyers expect. A bias-ply tire keeps the car in its original era of sizing and presentation, while a modern radial equivalent changes the size language and can alter the overall impression even when the rim diameter remains the same.

That matters most on a compact sedan where the tire and wheel package is visually prominent against relatively small body dimensions. Owners aiming for a restoration-oriented result often begin with the correct bias-ply size, then choose whitewall style carefully, while owners prioritizing modern road use may accept a more contemporary look in exchange for a radial alternative.

Yes, modifications can affect tire fitment on a 1966 Toyota Tiara even when the tire size itself is correct for the model. Aftermarket wheels, changes in wheel width, suspension alterations, or bodywork repairs can all influence how a 560-13 or 590-13 tire sits and clears the car under steering and normal suspension movement.

That is especially important when considering a radial equivalent, since a different construction and sizing system can change the fitment relationship in practical terms. A Tiara with non-original wheels or altered ride height should have wheel dimensions and clearance checked carefully before replacement tires are selected, mounted, and driven at road speed.

Before driving a 1966 Toyota Tiara on new tires, inspect the wheels for correct diameter and condition, confirm that the tire size matches the car's setup, and check that inflation is set appropriately for the tire being used. It is also wise to examine suspension, steering, and brake components on a low-use collector car before returning it to the road.

A short initial drive should be used to verify clearance, steering response, and any signs of rubbing or unusual vibration. Looking over the tires again after that first outing helps catch mounting issues, slow air loss, or contact problems early, which is especially valuable on an older car that may have sat for long periods.

Collector-car tires in 560-13 or 590-13 should be maintained with regular pressure checks, visual inspection, and careful storage habits. Even if tread wear is minimal, an older tire can still develop cracking, flat spotting, bulges, or weather-related deterioration. That matters on a 1966 Toyota Tiara because these smaller vintage sizes often see intermittent rather than daily use.

Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps preserve tire condition between drives. It also makes sense to inspect the sidewalls and tread before every outing and to rotate the car's position during storage when possible, especially if it spends long stretches parked without being driven.