Graham 85 Series Tires

The Graham 85 Series in this year range uses one tire size: 5.25-17 for 1937. That is a traditional numeric bias-ply size, and the 17 in the code indicates a 17-inch wheel diameter. For a buyer working with a single-year fitment, the size question is simpler than on many prewar models because there is no year-to-year size split within this range.

The practical step is to confirm that the car still wears its correct 17-inch wheels and has not been changed to another rim during restoration or past service. Once the wheel diameter is verified, you can focus on choosing the right construction style and appearance for the way the Graham 85 Series will be used.

On a Graham 85 Series, 5.25-17 is a numeric bias-ply tire size. The 5.25 is the nominal section width in inches, while 17 is the wheel diameter in inches. Unlike later metric sizing, this older format does not spell out aspect ratio in the code, so the tire's proportions reflect period bias-ply design rather than modern low-profile conventions.

That matters because a modern buyer may see the size as simple, yet the tire's profile, stance, and fit on the rim are all tied to that original numeric bias-ply format. Matching the size code exactly is the best starting point for preserving the proper look and road manners of the Graham 85 Series.

The Graham 85 Series uses a numeric bias-ply size, and with that type of prewar tire fitment, a tube is required. Tube-type construction was normal for vehicles of this era, especially on original-style steel wheels. When the tire size is 5.25-17 in traditional bias-ply form, the tube is part of the intended fitment rather than an accessory added only in special cases.

That means the wheel condition matters just as much as the tire itself. Before fitting new tires on a Graham 85 Series, inspect the rim for rust, pitting, bent flanges, or old repairs that could affect tube life, and make sure the wheel is suitable for continued use on a collector car.

For a 1937 Graham 85 Series, the size to confirm is 5.25-17. Since only one size appears for this year range, the main issue is not sorting through multiple listings but verifying that the wheel on the actual car remains the correct 17-inch type. Older cars sometimes picked up replacement rims during decades of service, storage, or restoration work.

A careful owner should compare the wheel diameter on the car with factory literature, restoration records, or recognized Graham reference material. If the car has been modified, the correct tire for the wheel currently installed may differ from the original fitment, so identify the wheel first and the intended restoration goal second.

Made-to-order on a Graham 85 Series tire means the tire is produced as a specialty collector application rather than treated like a high-volume modern replacement. That usually reflects the limited demand for prewar sizes such as 5.25-17 and the need to support historically correct fitments that serve restorers, drivers, and show-car owners.

For the buyer, the important point is that made-to-order status should be treated as part of the product's specialty nature, not as a sign that the size is incorrect. When evaluating a tire for a Graham 85 Series, focus first on the exact size, proper construction, and authentic appearance for your goals.

A Graham 85 Series should be stored in a cool, dry, dark space away from direct sunlight, ozone sources, and large temperature swings. Keep the car off damp ground, and if storage will be extended, move it occasionally or support it in a way that reduces long-term flat spotting. Prewar bias-ply tires are especially sensitive to age, environmental exposure, and long periods of static load.

Good storage habits help preserve both tire life and ride quality. If the Graham 85 Series is driven only seasonally, maintain proper inflation, keep the tires clean, and avoid petroleum-based dressings that can damage rubber or leave the sidewalls looking unnaturally glossy on a period car.

Tires on a Graham 85 Series should be inspected before every drive and more thoroughly at regular intervals even when the car is not being used much. On a low-mileage prewar collector car, age and storage conditions can matter more than tread wear. Look for cracking, sidewall stiffness, irregular wear, tube-related issues, and any signs that the bead area or rim may be causing trouble.

Routine inspection is one of the best habits an owner can develop with an older Graham 85 Series. A short walkaround before moving the car can catch low pressure, visible damage, or a developing problem early enough to prevent harm to the tire, tube, rim, or bodywork.

Tires on a Graham 85 Series should be replaced when age, cracking, hardening, vibration, repeated air loss, or structural deterioration appear, even if the tread still looks usable. Collector cars often age out their tires long before they wear them out. On a prewar application, the condition of the tube, flap if used, and rim should be considered alongside the outer tire.

The key point is that appearance alone is not a complete safety measure on an older Graham 85 Series. If the car has spent years parked or if the rubber feels dry and inflexible, replacement is usually the wiser path than trying to extract more service from a visibly aged tire.

The Graham 85 Series in this range is associated with the 5.25-17 size, which places it firmly in the prewar numeric bias-ply world. That gives restorers the correct size family to begin with, but original factory brand, tread, and sidewall presentation can vary depending on how a specific car was delivered or later serviced. Size is the most important first step in recreating an authentic stance.

If you are restoring a Graham 85 Series for high-level authenticity, compare your car against period sales literature, surviving photos, and marque-club knowledge before making a final tire choice. Once the 5.25-17 size is established, details such as sidewall treatment and tread style can be matched to your restoration standard.

Correct tire fitment can absolutely affect both presentation and judging on a Graham 85 Series. Tire size, sidewall style, and overall profile influence the car's stance as much as paint, trim, or wheel finish, and experienced judges often notice when a prewar car sits too tall, too low, or on an obviously modern-looking tire.

That does not mean every owner needs concours-level exactness, but the closer the Graham 85 Series stays to its proper tire size and period-correct appearance, the stronger the finished car usually looks. Marque clubs, period photos, and judged-event standards are useful references when authenticity is part of the goal.

A Graham 85 Series restoration should use a sidewall style that suits the late prewar period and the overall presentation of the car. On cars of this era, either blackwall or white sidewall can be appropriate depending on trim level, owner preference, and the character of the restoration. The correct choice is less about modern fashion and more about matching the period image you want the car to carry.

A formal or highly finished Graham 85 Series may look most at home with a period-style white sidewall, while a more restrained restoration can be very convincing on blackwalls. The best approach is to match sidewall style to period photography, original sales material, and the exact finish level of the car.

A properly fitted, correctly maintained collector tire can be suitable for public-road use on a Graham 85 Series when the car itself is also mechanically sound. That said, a 1937 prewar automobile was designed around braking, steering, suspension, and traffic conditions very different from those of modern roads. Tire choice is only one part of roadworthiness.

A sensible owner should treat the Graham 85 Series as a historic car, not as a modern commuter. Keep speeds conservative, leave extra following distance, and make sure the wheels, brakes, steering components, and alignment have all been inspected to the same standard as the tires.

Before driving a Graham 85 Series, check tire inflation, visible sidewall condition, tread condition, valve stems, and any signs of tube leakage or rim trouble. Also look at wheel fasteners, steering play, brake response, and whether the car has been sitting long enough to create flat spotting or stiffness in the tires. A short inspection matters more on a low-use collector car than on a regularly driven modern vehicle.

That routine becomes especially important after winter storage or a long layup. Giving the Graham 85 Series a careful pre-drive inspection helps catch small issues before they become a roadside problem and gives the driver a clearer sense of how the car will behave once it is moving.

A Graham 85 Series should be driven at speeds that respect both prewar vehicle design and the characteristics of period-style bias-ply tires. Even with new tires, the car's steering, braking, suspension geometry, and driver expectations belong to an earlier era. Safe speed is therefore governed by the complete condition of the automobile, not by tread depth alone.

In practical terms, that means conservative cruising, smooth lane changes, and avoiding the pace of aggressive modern freeway traffic whenever possible. A well-sorted Graham 85 Series is best enjoyed at moderate speeds where the car feels settled, the tires are not overstressed, and the driver has time to react.