1937 Graham 120 Supercharger Tires

The 1937 Graham 120 Supercharger uses two primary tire sizes: 6.25-16 and 650-16. Both are bias-ply fitments designed for 16-inch rims, and the covered 6 Cyl. sub-model can use either size depending on the wheel and tire setup on the car.

That makes the first job simple but important: verify the size already mounted and confirm the wheel diameter before choosing a replacement. A buyer comparing these two fitments should also consider the car’s current stance, wheel width, and whether the goal is a narrower prewar look or a broader selection of available 650-16 tire styles.

The tire fitments for the 1937 Graham 120 Supercharger are built around a 16-inch rim diameter. Both 6.25-16 and 650-16 use that same 16-inch wheel size, so the rim diameter itself does not change between the two primary fitments.

Rim diameter is only part of the fitment picture, though. A replacement tire should also be matched to the actual wheel width on the car, especially when comparing products in 650-16 that may call for different rim-width ranges. Looking at the stamped wheel size and the tire currently installed helps prevent choosing the right diameter but the wrong overall setup.

The 1937 Graham 120 Supercharger can be found with both 6.25-16 and 650-16 bias-ply fitments, even within the covered 6 Cyl. sub-model. Those sizes are close in vintage format, but they are still distinct tire sizes and should be treated as separate fitment choices rather than interchangeable by assumption.

For the owner, that means the tire already on the car is an important clue, but the wheel itself should also be checked. Older vehicles may have had wheels, tires, or restoration choices changed over time, so selecting by year and model alone is not enough. Confirm the actual 16-inch wheel setup before deciding which bias-ply size to continue using.

Start with the basics: confirm that 650-16 is the size already used on the car, then compare the available bias-ply options by sidewall style, tread character, and rim-width suitability. In this size, the selection ranges from traditional blackwalls to wide whitewalls, with both passenger-car and truck-style series available.

That means the right choice depends on how the Graham will be presented and driven. A restoration-oriented car may call for a more formal whitewall appearance, while a different build may suit a blackwall or utility-style tread. Checking wheel width, load figures where stated, and the tire’s overall visual character will help narrow the choices sensibly.

For the available 650-16 fitment, sidewall choices include blackwall and wide whitewall. That gives the 1937 Graham 120 Supercharger owner a meaningful appearance decision, especially on a prewar car where sidewall treatment has a strong effect on the finished stance and overall period presentation.

The better choice depends on the car’s restoration direction rather than a universal rule. Wide whitewalls create a more formal, dress-era look, while blackwalls keep the presentation simpler and more restrained. Before settling on either style, make sure the size itself is correct for the wheels on the car, since appearance should come after fitment is confirmed.

In 650-16, the 1937 Graham 120 Supercharger has tire choices from BFGoodrich, Coker Classic, Firestone, Garfield, Lester, Goodyear, STA, and Tornel. Those offerings span classic bias-ply passenger-car lines along with some more specialized truck and utility-oriented patterns in the same size.

Brand choice should be viewed as one part of a larger fitment decision. It helps to compare each tire’s sidewall style, series character, rim-width specification when shown, and whether the tread design matches the way the car will be used. Staying with the correct size and construction matters more than chasing a name alone.

The available 650-16 choices include series such as Silvertown Classic Bias Ply, Coker Classic Bias Ply, Firestone Classic Bias Ply, Garfield Classic Bias Ply, Lester Classic Bias Ply, Deluxe All-Weather, Transport, STA Classic Military, Super Traxion, Transport Highway, Tornel Classic Truck, and Firestone Classic Truck.

Those series matter because they reflect different visual and use-case directions within the same size. Some lean toward traditional passenger-car presentation, while others carry a more truck-style or utility tread character. Once the correct 650-16 fitment is confirmed, the series name becomes a useful shortcut for narrowing the tire to the car’s intended look and use.

A period-style 1937 Graham 120 Supercharger should begin with the correct vintage bias-ply size and 16-inch rim fitment, which means confirming whether the car is set up for 6.25-16 or 650-16. From there, the tire choice becomes a matter of visual presentation, tread style, and how closely the finished look matches the car’s restoration goals.

A narrower or simpler look may point one direction, while a fuller whitewall presentation may point another. Exact originality can vary by how an individual car was delivered or restored, so buyers pursuing a highly exact finish should compare the tire choice against period photos, marque references, and the car’s own documented history before making a final selection.

For a period-style 1937 Graham 120 Supercharger, the available sidewall choice in 650-16 comes down to blackwall or wide whitewall. Either can create an appropriate prewar presentation, but they give the car a notably different visual tone once mounted on a tall 16-inch bias-ply tire.

Wide whitewalls tend to emphasize the formal styling and full-bodied prewar look, while blackwalls keep the car more understated and mechanical in character. The best match depends on the restoration direction and the way the car is trimmed. It is worth deciding on sidewall appearance early, because it shapes the whole profile of the finished car.

Yes, modifications can affect tire fitment on a 1937 Graham 120 Supercharger, even when the tire size itself appears correct. Aftermarket wheels, changed wheel widths, altered ride height, brake updates, or body and suspension work can all influence how a 6.25-16 or 650-16 tire sits and clears the car.

That is why an older vehicle should be checked as it exists today rather than assumed to match its original setup. Measure the wheel diameter and width, inspect steering and fender clearance, and look for any signs of rubbing at full lock or over suspension movement. Those checks matter before replacing a single tire or a full set.

Before driving a 1937 Graham 120 Supercharger on new tires, inspect the wheels for correct diameter and condition, confirm the tires are seated properly, and make sure inflation is appropriate for the tire being used. It also helps to check valve stems, lug hardware, and basic alignment-related wear points before regular road use.

A collector car that has seen limited use deserves an extra walkaround after installation. Look for fender or steering interference, verify there is no unusual air loss, and recheck the tires after the first few miles. Older suspension and steering components can change how a fresh set of bias-ply tires behaves, so early inspection is worthwhile.

Collector-car tires in 6.25-16 or 650-16 should be maintained with regular pressure checks, routine visual inspection, and careful storage habits. Even when tread looks good, age, heat, sunlight, and long periods of inactivity can affect a bias-ply tire’s condition, especially on a prewar car that may spend more time parked than driven.

Good maintenance includes watching for sidewall cracking, cuts, bulges, flat spotting, and any change in how the car tracks on the road. Keeping the Graham clean, stored in a dry space, and moved periodically can help preserve the tires between outings. Any sign of air loss or structural change should be addressed before the next drive.