1978 Aston Martin AM Tires

The 1978 Aston Martin AM uses a GR70-15 tire size. This is a radial fitment, and it is the primary size associated with the covered vehicle configuration, including the Base sub-model.

That means the first step is not choosing between multiple sizes, but confirming that the car still has the correct 15-inch wheels and a wheel width compatible with the tire being considered. If the car has been changed with aftermarket wheels or suspension alterations, the GR70-15 size should still be checked against actual wheel dimensions and body clearance before installation.

The 1978 Aston Martin AM uses a 15-inch rim with its GR70-15 tire size. That 15-inch diameter is the key wheel measurement tied to the vehicle's primary tire fitment.

Rim diameter should be confirmed before anything else, because a GR70-15 tire is built for a 15-inch wheel. Wheel width matters too, especially when comparing specific product options, since available GR70-15 tires do not all share the exact same rim-width specification. Checking the stamping on the wheel or measuring the wheel already on the car helps avoid choosing a tire that suits the size designation but not the actual wheel.

Yes. The 1978 Aston Martin AM Base uses the same GR70-15 radial tire size as the covered 1978 Aston Martin AM fitment. There is no separate primary tire size to sort through for that sub-model here.

That keeps the buying decision focused on product choice rather than sub-model size differences. Once the Base configuration is confirmed, attention can shift to the tire's sidewall appearance, the series you prefer, and whether the wheel on the car matches the rim-width requirements of the GR70-15 product under consideration. That is especially important on collector cars that may no longer wear their original wheel setup.

Start with the confirmed fitment: the 1978 Aston Martin AM uses GR70-15 on a 15-inch rim. From there, the main selection points are tire construction style, wheel-width compatibility, sidewall treatment, and the overall look you want the car to carry.

Available GR70-15 choices for this application are Goodyear bias-look radial designs, so the decision is really about matching the tire to the car's presentation and setup. A pin-white-stripe version gives a different visual effect than raised white letters, and rim-width specifications vary by product. Comparing those details before purchase helps keep the tire choice aligned with both the wheel and the character of the car.

GR70-15 tires for the 1978 Aston Martin AM are available with pin-white-stripe and RWL sidewall styling. RWL refers to raised white letters, which gives the tire a more overt performance-era presentation than a finer stripe treatment.

Sidewall style changes the car's look more than many buyers expect, especially on a late-1970s grand touring car with a strong visual presence. A pin-white-stripe usually leans more understated and formal, while raised white letters create a sportier period-style appearance. The best choice depends on how the car is being presented, whether the goal is subtle restoration-minded styling or a more assertive road-going look.

The available GR70-15 tires for the 1978 Aston Martin AM include Goodyear GM Custom Tread, Steelgard, and Custom Wide Tread series. All are offered in a vintage-style radial format aimed at buyers who want the right era feel in a 15-inch fitment.

Series names help separate the available choices when size alone does not. Once GR70-15 is established, the practical comparison becomes sidewall appearance, wheel-width specification, and the general visual character each series brings to the car. Looking at those factors together is more useful than choosing by series name alone, especially when trying to balance a period-style presentation with the wheel setup currently on the vehicle.

A period-style 1978 Aston Martin AM should begin with the correct GR70-15 size on a 15-inch rim. Within that fitment, the available choices are Goodyear bias-look radial tires, which suit buyers who want a traditional late-1970s presentation without moving away from the known radial size.

The finer decision comes down to visual character and wheel compatibility. A pin-white-stripe tire will read differently on the car than a raised white letter version, and different GR70-15 products carry different rim-width specifications. Buyers pursuing exact historical authenticity should also compare the chosen style against marque references, period photos, or restoration documentation rather than assuming any one sidewall treatment is automatically correct.

Tire construction influences both stance and visual tone, even when the size remains the same. On the 1978 Aston Martin AM, the primary fitment is GR70-15 radial, and the available products are bias-look radial designs that aim to preserve a more traditional appearance than a visibly modern tire.

That matters on a restored car because the tire is one of the first details the eye reads against the body, wheel opening, and wheel design. A bias-look radial can help keep the presentation appropriate to the period while still staying within the known radial fitment. Sidewall styling then becomes the finishing touch, making the overall result look either more restrained or more performance-oriented.

Yes. Even though the primary tire size is GR70-15 on a 15-inch rim, modifications can change how well that fitment works on an individual 1978 Aston Martin AM. Wheel width, offset, ride height, and suspension changes can all alter clearance.

A car with aftermarket wheels may still accept the correct tire size designation but react differently at the fender, steering, or suspension compared with a stock setup. That is why the wheel already on the car should be measured before choosing among GR70-15 products, especially since available tires in this size do not all share the same rim-width requirement. A careful clearance check is worthwhile before road use.

Before driving a 1978 Aston Martin AM on new tires, inspect the wheels, valve stems, lug hardware, and the overall condition of the suspension and steering components. Tire pressure should be set correctly, and the mounted tires should be checked for proper seating and visible clearance around the body and chassis.

Collector cars often sit for long periods, so it also makes sense to look for old wheel damage, worn bushings, brake drag, or alignment issues that could affect a fresh set of GR70-15 tires. A short initial road test is a smart final step. It helps confirm that the car tracks properly, clears at full steering lock, and does not show rubbing under normal movement.

GR70-15 tires on a collector 1978 Aston Martin AM should be kept properly inflated, inspected regularly for cracking, cuts, bulges, and uneven tread wear, and protected from long exposure to heat, sunlight, and ozone sources. Even low-mileage tires need condition checks because age can matter as much as use.

Storage habits make a real difference on a car like this. Clean, dry conditions and periodic movement help reduce flat spotting and help the tires wear more evenly over time. It also helps to check air pressure before each drive rather than assuming it has held steady in storage. Any sign of persistent air loss or sidewall deterioration deserves attention before the car returns to the road.