1940 Pontiac 25 Tires

The 1940 Pontiac 25 uses a 600-16 tire. That is the primary fitment for this vehicle, and it is a bias-ply size built for a 16-inch wheel, which matches the traditional tire format expected on a prewar Pontiac of this era.

Size confirmation is still worth doing on the car itself, especially if it has been restored years ago or has had wheels changed at some point. Once 600-16 and the 16-inch wheel are confirmed, the real choice becomes sidewall appearance, tire series, and whether the tire's overall character matches a restoration-oriented car or one prepared for occasional road use.

The 1940 Pontiac 25 uses a 16-inch rim with its 600-16 tire fitment. That wheel diameter is central to the tire choice, because a vintage numeric size like 600-16 is built around the 16-inch rim designation in the size itself.

Wheel diameter should be checked directly before ordering, especially on collector cars that may have received replacement wheels long ago. Rim width also matters when comparing specific 600-16 products, since many passenger-car options in this size are intended for relatively narrow vintage wheels, and the wheel on the car should suit the tire being considered.

Yes. The 1940 Pontiac 25 Special 6 Cyl. uses the same 600-16 bias-ply tire size as the model core. That keeps sub-model fitment simple, with no alternate primary size to sort through for the covered configuration.

Even with shared size fitment, the car may still wear different tires depending on restoration style and how it is driven. A blackwall gives a more restrained presentation, while whitewall and double-whitewall versions create a more dressed appearance, so the sub-model question is easy but the visual choice remains important.

Start with the correct 600-16 size and the proper 16-inch wheel, then compare the tire's construction, sidewall style, and series. On a 1940 Pontiac 25, all applicable options remain bias-ply, so the key differences come from appearance, tread character, brand, and wheel-compatibility details within that vintage size.

A restoration-oriented sedan may call for a traditional passenger-car tread and a sidewall treatment that suits the car's finish level, while a more specialized military or truck-style pattern creates a very different look. Product-by-product rim-width guidance is also worth checking so the tire matches the actual wheel on the car rather than only the nominal size.

The 1940 Pontiac 25's 600-16 fitment is available in blackwall, wide whitewall, and double-whitewall form. Those choices all stay within the same vintage bias-ply size, but they change the car's presentation quite a bit, from understated driver style to a more formal prewar appearance.

Sidewall choice should be guided by the car's restoration direction rather than treated as purely decorative. A blackwall often suits a simpler, utility-minded look, while whitewall treatments can better complement bright trim and a more fully restored exterior, so it helps to view the tire as part of the Pontiac's overall visual balance.

Available 600-16 tires for the 1940 Pontiac 25 include offerings from BFGoodrich, Coker Classic, Avon, Firestone, Ford Script, Excelsior, Lester, Goodyear, STA, and Camac. These brands appear across several vintage-style bias-ply series, including both passenger-car and more specialized military or truck-oriented tread designs.

Brand alone should not be the only filter. It makes more sense to compare the tire's sidewall treatment, series character, rim-width suitability, load specification where shown, and whether the tread style matches the intended use of the car. That approach keeps the decision centered on fitment and presentation rather than name recognition by itself.

A period-style 1940 Pontiac 25 should start with the proper 600-16 bias-ply size on a 16-inch wheel. From there, the most appropriate choice usually comes down to selecting a passenger-car bias-ply series and a sidewall treatment that matches the car's level of trim and the visual tone of the restoration.

Wide whitewall and double-whitewall tires can create a more formal prewar look, while blackwalls keep the presentation more restrained. Exact originality can vary by body style, trim level, and how the car was delivered, so owners pursuing strict historical accuracy should compare their tire choice against marque references and restoration documentation for the specific car.

Tire construction has a noticeable effect on the look of a restored 1940 Pontiac 25 because bias-ply tires carry the shape, sidewall character, and stance most buyers expect on a prewar American car. In this fitment, the available options stay within that traditional bias-ply format rather than shifting the car toward a visibly more modern tire profile.

Appearance is not only about whitewalls versus blackwalls. Tread style, shoulder shape, and the overall visual scale of the tire all influence how authentic or era-appropriate the Pontiac feels when viewed from the side. Keeping the correct size and vintage construction together usually does more for the car's presence than focusing on brand alone.

Yes. A 1940 Pontiac 25 may use the correct 600-16 tire size on paper, but aftermarket wheels, altered wheel width, brake changes, suspension work, or body modifications can all change how that tire actually sits and clears. Even subtle changes can matter on an older car with narrow original-style wheel openings.

Checking actual wheel diameter is the first step, followed by a close look at steering clearance, fender clearance, and the condition of the suspension components. A modified car can still use a period-style tire, but the setup should be measured on the vehicle rather than assumed from the original size designation alone.

Before road use, inspect the wheels for damage, confirm the 16-inch rims are appropriate for the chosen 600-16 tire, and make sure the tires seat properly and hold pressure. It also helps to check valve stems, lug hardware, and basic wheel security so the tire installation begins on sound hardware.

The rest of the inspection should focus on the car's readiness rather than the tire alone. Look at steering play, brake function, suspension condition, and whether the tires clear during full lock and suspension movement. A short local drive followed by another visual check is a sensible way to catch rubbing, settling, or pressure loss early.

A 600-16 bias-ply tire on a collector 1940 Pontiac 25 should be kept properly inflated, inspected regularly for cracking, cuts, bulges, and uneven wear, and stored away from prolonged sunlight, heat, and ozone sources when the car is not in use. Collector cars often age tires out long before they wear them out.

Regular movement and periodic air-pressure checks help prevent a stored car from developing avoidable tire issues. It is also wise to look over the tires before every drive, especially after long periods of sitting, because a prewar car that is used only occasionally depends heavily on condition checks rather than mileage-based maintenance habits.