1970 Aston Martin Tire Fitment Guide

1970 Aston Martin vehicles use three sizes across two model lines: 8.25-15 and 815-15 for the 1970 Aston Martin DB, and 205R15 for the 1970 Aston Martin DBS. All three sizes mount on 15-inch wheels, but they are not interchangeable across the whole year-and-make range simply because the construction type and sizing convention differ by model. For wheel width, 815-15 fits a 5.00 to 6.50-inch rim range, and 205R15 fits a 5.50 to 6.00-inch rim range.

That means the first step is identifying whether your car is a DB or a DBS. Once the model is confirmed, you can narrow the choice to the correct size family and then verify the actual wheel width on the car before final selection, especially if the car has been restored, modified, or fitted with replacement wheels at some point in its life.

On a 1970 Aston Martin, 815-15 is an older numeric bias-ply size. The code uses a width-based convention rather than a modern metric format, and the 15 identifies a 15-inch wheel diameter. In available BFGoodrich versions, 815-15 carries a 1610-pound maximum load at 32 psi and fits wheels from 5.00 to 6.50 inches wide.

For a DB owner, that matters because 815-15 points you toward a traditional bias-ply tire with distinctly vintage proportions and sidewall styling. If your goal is a period-correct appearance, especially with whitewall or redline detail, this size keeps you in the right family of fitment rather than pushing the car toward a later radial look associated with the DBS.

On a 1970 Aston Martin, 205R15 is a euro-metric radial size used on the DBS. The 205 is the nominal section width in millimeters, the R identifies radial construction, and the 15 is the wheel diameter in inches. Because no aspect ratio is written into the code, this style of metric sizing is conventionally treated as an 80-series radial format.

That size places the DBS in a later tire vocabulary than the DB, even though both use 15-inch wheels. It also opens the door to different sidewall looks, since 205R15 is available in both wide whitewall and blackwall versions, so a DBS owner can balance era flavor, visual preference, and the general road manners associated with radial construction.

That choice depends first on model, not taste alone. The 815-15 belongs to the 1970 Aston Martin DB and is a bias-ply fitment, while the 205R15 belongs to the 1970 Aston Martin DBS and is a radial fitment. They share a 15-inch wheel diameter, but they represent different tire constructions and different fitment paths tied to different Aston Martin models.

If you own a DB, staying with its numeric bias-ply sizing supports an earlier, more traditional presentation. If you own a DBS, the 205R15 keeps you aligned with the model's radial-era direction. The practical takeaway is simple: identify the car correctly first, then choose within the size and construction family that matches that specific Aston Martin rather than comparing the two as universal substitutes.

1970 Aston Martin tire sidewall choices vary by size. The 815-15 for the DB is available as a Narrow Whitewall or a Whitewall-Redline in BFGoodrich bias-ply form. The 205R15 for the DBS is available as a Wide Whitewall from Phoenix or a Blackwall from Avon, both in radial construction.

For a 1970 Aston Martin, sidewall style affects the visual character of the car as much as the size itself. DB owners usually look for a more traditional period presentation, while DBS owners may prefer either a cleaner blackwall grand-touring look or a whitewall treatment depending on the restoration direction. If show authenticity matters, compare your intended sidewall style against period photos and marque-club guidance for your exact model.

Three brands cover 1970 Aston Martin tire fitments here. BFGoodrich supplies the 815-15 bias-ply size for the DB, while Phoenix and Avon supply the 205R15 radial size for the DBS. That keeps the DB and DBS in clearly different product families even though both use 15-inch wheels.

Brand choice becomes more important once you know which model you have. A DB owner choosing between BFGoodrich sidewall treatments is making a styling decision within a bias-ply format, while a DBS owner comparing Phoenix and Avon is choosing between radial products with different visual presentation and, in Avon's case, a stated V speed rating. Start with fitment, then narrow by brand character and appearance.

Rim width requirements for 1970 Aston Martin tires depend on size. The 815-15 used on the DB fits wheels from 5.00 to 6.50 inches wide. The 205R15 used on the DBS fits wheels from 5.50 to 6.00 inches wide. Both sizes use a 15-inch wheel diameter, but the acceptable rim-width window is not identical.

That makes wheel verification important before you settle on a specific tire. A car that still has its original wheels may be straightforward, but many older Aston Martins have seen wheel changes over the years. Measuring the actual wheel width gives you a cleaner answer than relying on assumption, and it helps avoid choosing a tire whose approved rim range does not suit the wheel currently on the car.

Inner-tube requirements on 1970 Aston Martin tires can vary by product. The 815-15 bias-ply products are shown without tube-type or tubeless marking in the size itself, while the 205R15 radial offerings are also presented without a uniform tube notation across both products. That means the tire size alone does not settle the question for every product in every case.

The practical step is to confirm the specific tire's sidewall marking and then match that to the wheel type on the car. Older wheel designs, wheel condition, and restoration choices can all influence whether a tube is appropriate, so tube use should be treated as a product-and-wheel decision rather than assumed from the year and make alone.

All 1970 Aston Martin sizes here use a 15-inch wheel diameter, so there is a basic diameter commonality across the DB and DBS range. That does not automatically mean every original wheel is appropriate for every size, because rim-width requirements differ between sizes and the DB and DBS do not share the same tire format or intended fitment.

In practice, a 15-inch wheel is only the starting point. Before reusing original wheels across different size choices, confirm the actual wheel width and make sure the tire belongs to your specific model. That approach respects both fitment accuracy and the way Aston Martin's range was transitioning from older numeric bias-ply sizing to radial metric sizing at this point in the marque's history.

A 1970 Aston Martin should be stored in a cool, dry space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can accelerate sidewall cracking. Keep the tires properly inflated, avoid prolonged contact with damp concrete if possible, and move the car periodically or support it in a way that reduces long static loading. Bias-ply tires are especially prone to temporary flat-spotting after long storage compared with radials.

That matters on both DB and DBS models, but the effect can be more noticeable on a DB fitted with bias-ply tires after the car has sat for weeks or months. A careful storage routine preserves ride quality, protects sidewalls, and reduces the chance that a collector car's next outing begins with vibration, pressure loss, or early age-related cracking.

Tire life on a 1970 Aston Martin should be judged by age and condition more than by mileage, since many collector cars cover relatively few miles each year. A good rule is to inspect closely once tires reach the five-to-seven-year range and to treat about ten years as the point where replacement deserves serious consideration regardless of remaining tread. The DOT date code on the tire helps establish actual age.

That approach is more useful than waiting for visible wear bars on a lightly driven grand tourer. A DB or DBS can spend long periods parked, and aging often shows up as sidewall cracking, hardening, or loss of flexibility before tread wear becomes significant. For a car that sees occasional highway use, age management is one of the simplest ways to reduce avoidable tire risk.

Tires on a 1970 Aston Martin deserve a quick inspection before every drive and a more thorough check before any extended outing. Look for sidewall cracking, tread separation, cuts, bulges, uneven wear, and pressure loss. If your chosen tire and wheel combination uses tubes, include the valve stem and tube-related sealing points in that routine rather than checking tread condition alone.

Frequent inspections matter because collector cars often spend more time parked than driven, and age-related issues can appear between outings. A brief walkaround before a local drive and a more careful pressure-and-condition check before a tour will catch most tire problems early, which is particularly worthwhile on a 1970 Aston Martin where replacement cost and originality concerns both reward preventive attention.

The 1970 Aston Martin DB belongs to an era when bias-ply construction was still central to many original-fitment expectations on established grand touring cars, and its associated sizes here are 8.25-15 and 815-15, both bias-ply. That places the DB firmly in the traditional size-and-construction camp rather than the later radial metric format used on the DBS. Original-equipment brand can vary by market, period, and restoration history, so size and construction are the safest authenticity anchors.

For a restoration, the priority is usually matching the DB to the correct bias-ply size family first, then choosing a sidewall style that suits the car's intended presentation. If you are preparing the car for judged events, compare your tire choice with period photography, factory literature, and Aston Martin marque specialists, since event standards often care as much about visual correctness as they do about the raw dimensions.

Correct tire fitment matters a great deal when a 1970 Aston Martin is judged for authenticity. Size, construction type, and sidewall treatment all affect whether the car looks era-appropriate. A DB on a later radial metric tire or a DBS on an obviously earlier-style bias-ply fitment can stand out for the wrong reasons, even if the tire physically mounts to a 15-inch wheel.

That is why show preparation should treat tire selection as part of the restoration story, not just a maintenance item. For casual touring, personal preference may lead the decision, but concours standards are often stricter about construction and visual detail. Check the judging guidelines for the event you plan to enter and use marque-club expertise to refine sidewall style and model-correct fitment before the car reaches the field.

For the 1970 Aston Martin DB, the BFGoodrich 815-15 options share the same basic bias-ply construction, size, load capacity of 1610 pounds at 32 psi, weight of 25 pounds, and 5.00 to 6.50-inch rim-width range. The main difference is sidewall appearance: one uses a 1.00-inch Narrow Whitewall, while the other combines a 1.00-inch whitewall with a 3/8-inch redline.

That means the decision is almost entirely visual rather than structural. A DB owner choosing between them should think about the car's restoration theme, period styling cues, and how restrained or sporty the finished car should look. If authenticity is the priority, period photos and marque references will help determine whether a plain whitewall or a redline treatment better suits the exact presentation you want.

1970 Aston Martin tires can be suitable for highway driving when they are the correct size for the model, properly inflated, and in sound age-related condition. The 205R15 Avon radial carries a V speed rating, which corresponds to 149 mph, while the 815-15 BFGoodrich bias-ply products do not show a speed rating in the size marking here. Even so, on a vintage Aston Martin, tire condition and the car's overall mechanical state usually matter more than theoretical top-speed capability in normal road use.

Highway safety comes down to matching the tire to the model, confirming condition before use, and driving within the realistic limits of a fifty-plus-year-old grand tourer. Fresh, properly maintained tires are only one piece of the picture; brakes, suspension, steering components, and alignment all deserve equal attention before regular higher-speed driving becomes part of the car's routine.

Inflation pressure for 1970 Aston Martin tires should start with the vehicle's factory recommendation for the specific model and then be checked against the tire manufacturer's pressure and load information for that exact size. The 815-15 BFGoodrich bias-ply tires carry a 1610-pound maximum load at 32 psi, and the 205R15 Phoenix radial carries a 1609-pound maximum load at 34 psi. Those figures describe the tire's rated condition, not necessarily the carmaker's preferred operating pressure.

That distinction matters because a reproduction or replacement tire may share the correct size while still having its own pressure guidance. Use the owner's manual or factory placard as your baseline, then confirm that your chosen tire's load-and-pressure rating supports the car properly. Avoid copying a pressure figure from one size to another, since the DB's bias-ply fitments and the DBS's radial fitment should be treated separately.

Before a longer drive in a 1970 Aston Martin, inspect all four tires and the spare for visible cracking, cuts, bulges, irregular wear, and proper inflation. Check that valve stems are sound, and if your tire-and-wheel setup uses tubes, make sure there are no signs of slow leakage or stem stress. On the road-test side, pay attention to vibration, pulling, or thumping that could point to flat-spotting, imbalance, or an internal tire issue.

A longer trip is also the right time to think beyond the tires themselves. A vintage Aston Martin benefits from a broader pre-drive check that includes fluids, brakes, steering, suspension, and charging system health, since any one of those can shape how the tires perform under load. A careful inspection routine helps preserve both safety and the driving enjoyment these cars are known for.