Reo 25 Series Tires

Reo 25 Series fitments in this year range include 30X6.20 and 650-18 for 1930, plus 6.50-17 for 1932. The 650-18 products use 18-inch rims, and the 6.50-17 size is a 17-inch rim fitment. The 30X6.20 size uses an older diameter-by-section convention, so its wheel diameter is not carried in the size code itself.

That means year alone is not always enough, especially for a 1930 Reo 25 Series. Start by reading the size marking on the tire or wheel if it survives, then confirm the actual rim diameter on the car. Once the wheel diameter is known, it becomes much easier to narrow the car to the correct size family.

On a Reo 25 Series, 30X6.20 is an older diameter-by-section size marking. The 30 refers to the tire's overall outside diameter in inches, while 6.20 refers to the nominal section width. Unlike a modern size, that first number is not the wheel diameter, so you cannot identify the rim size from 30X6.20 alone.

That older convention is where many fitment mistakes happen on early 1930s cars. If your Reo 25 Series carries 30X6.20 markings, check the wheel itself and compare it against the intended tire design before moving forward. Matching an antique-format size to the wrong wheel diameter will create fit and appearance problems immediately.

A 1930 Reo 25 Series can fall into either 30X6.20 or 650-18, which means more than one tire size convention appears within that model year. That split reflects a configuration difference rather than a single one-size-fits-all answer for every 1930 car. One listing uses an older diameter-by-section format, while the other is an 18-inch numeric balloon size.

The practical takeaway is to identify the car's specific wheel and surviving size markings before selecting a tire. A 1930 Reo 25 Series should not be matched by year alone when two fitments are possible. Looking at the wheel diameter first will usually separate the correct path quickly.

Reo 25 Series applications in this range use more than one rim diameter. The available 650-18 products are built for 18-inch rims, while 6.50-17 is a 17-inch fitment for 1932. The 30X6.20 size does not reveal its wheel diameter in the code, because the leading number is the tire's outside diameter rather than the rim size.

That makes wheel measurement one of the most important checks on any Reo 25 Series tire search. If the car is a 1932 model, the 17-inch fitment is the key clue. If the car is a 1930 model, confirm whether it belongs with the 18-inch numeric setup or with the older 30X6.20 arrangement.

Start with the model year, then verify the wheel diameter and any surviving size marks on the tire, wheel, or period service paperwork. A 1930 Reo 25 Series can use either 30X6.20 or 650-18, while a 1932 Reo 25 Series is listed with 6.50-17. That makes the wheel itself an essential confirmation point, not just a supporting detail.

If the car has been restored at some point, do not assume the current wheels are original to the chassis. Measure the rim diameter carefully and compare the size convention already on the car with the appropriate year listing. For an unusual or incomplete car, original literature or a Reo specialist can help settle the last question.

For the available 650-18 Reo 25 Series products, both blackwall and wide whitewall sidewall styles are offered. Both are bias-ply Firestone Balloon tires built for 18-inch rims with 3.25 to 3.50 inch rim widths. No sidewall style is listed here for the other Reo 25 Series sizes.

That gives a 1930 owner with 650-18 wheels a choice between a plainer service look and a more dressed appearance. The right choice depends on how the car is being restored and presented. If originality is important, compare the sidewall treatment to period photos, marque references, and the character of the specific car.

The available Reo 25 Series products in the listed size are from Firestone. Both options are in the Firestone Balloon series, with one offered as a blackwall and one as a 3.50 inch wide whitewall. No additional brands appear in the current product group for this model page.

Brand selection matters less than getting the correct size family and wheel diameter on a car of this age. Once those basics are confirmed, details such as sidewall appearance and period-correct presentation become the next decision points. For many restorations, the visual profile of the tire is just as important as the basic fit.

A Reo 25 Series should be stored in a cool, dry, dark space away from direct sunlight, ozone sources, and large temperature swings. Keep the tires clean, maintain proper inflation, and avoid letting the full vehicle weight sit in one position for long periods. Early collector cars benefit from occasional rolling or from careful support that reduces flat-spotting strain.

If the car will sit for months, check inflation before storage and again before moving it. Tube-type bias-ply tires are especially sensitive to neglect because low pressure and long immobility can stress both the casing and the tube. Good storage habits preserve the tire's shape, appearance, and service life.

Tires on a Reo 25 Series should be inspected before every drive and more thoroughly at regular intervals during the season. Look for sidewall cracking, tread separation, cuts, punctures, uneven wear, bead problems, and signs that the tube or flap may be causing distortion. On a low-use collector car, age and storage damage matter as much as tread depth.

A pre-drive inspection is especially important on an early 1930s car because even short drives can stress an old tire quickly if pressure is low or casing condition has changed. Include the spare in the routine, since it may be the oldest tire on the car. Any change in ride, pull, vibration, or appearance deserves immediate attention.

A Reo 25 Series tire should be replaced when age, cracking, hardening, separation, impact damage, or persistent air-loss issues appear, even if the tread still looks usable. Collector tires often age out long before they wear out. A tire that looks presentable at a glance may still be unfit for road service once its structure is evaluated closely.

That matters because low annual mileage can create a false sense of security on antique and early classic cars. Have older tires inspected by a specialist who understands tube-type and bias-ply construction, especially if the car has sat for years. Replacement timing should be guided by condition, age, and intended use rather than tread depth alone.

Reo 25 Series applications in this range are associated with 30X6.20, 650-18, and 6.50-17 depending on year and configuration. The available current products are Firestone Balloon bias-ply tires in 650-18. Since more than one size appears across the model group, the original answer for a specific Reo 25 Series depends on the exact year and setup of the car.

For a restoration aimed at factory accuracy, treat the model-year listing as the starting framework and then narrow the choice with period photographs, surviving tires, wheel measurements, and marque literature. Reo changed during a period when tire conventions were evolving quickly. Small differences in wheel equipment can affect what looks and fits correctly.

Correct tire fitment can absolutely affect both the appearance and judged authenticity of a Reo 25 Series. Size, sidewall treatment, profile, and overall stance all influence whether the car presents as properly restored for its year and configuration. On an early 1930s car, the wrong tire format can make the vehicle look noticeably out of period.

That is why restorers usually verify tire choice against period references before final assembly. A blackwall versus wide whitewall decision may also matter depending on the style and presentation of the specific car. If the car is intended for formal judging, use marque clubs and event rules as the final authority.

The listed Reo 25 Series 650-18 products are available in both blackwall and wide whitewall form. Either can change the character of the finished car significantly, even when the size and construction are otherwise the same. The correct look depends on the exact year, trim presentation, and restoration objective for the individual Reo 25 Series.

A car restored for a restrained service look will often lean toward blackwall, while a more formal or dressed presentation may call for whitewall. Because sidewall choice is highly visual, compare it to period imagery and the style of the wheels, paint, and overall finish. The goal is a tire that supports the era and personality of the car rather than overpowering it.

A properly sized, correctly mounted, and well-maintained tire can make a Reo 25 Series suitable for careful public-road use within the limits of an early 1930s automobile. Safety depends on much more than the tire alone, including wheel condition, tube condition, brakes, steering, suspension, and the overall mechanical state of the car. Bias-ply tires also behave differently from modern radials and should be driven with that in mind.

Use the car conservatively and with realistic expectations about stopping distance, cornering, and road-surface response. A tire that is correct for a Reo 25 Series is part of the system, not the whole answer. Before regular road use, make sure the entire chassis has been inspected to the same standard as the tires.

Before driving a Reo 25 Series, check tire pressure, visible sidewall condition, tread condition, valve stems, wheel hardware, and overall mounting security. Also inspect for any fresh cracks, bulges, cuts, or signs of tube-related distortion if the car has been sitting. On a vehicle of this era, tires should be part of a broader pre-drive inspection that includes brakes, steering, fluids, and wheel bearings.

That routine matters because an early car can feel normal at very low speed and still have a problem developing in one corner. Make the inspection a habit before every outing, not just after winter storage or maintenance work. A few minutes in the garage is far better than discovering a preventable issue once the car is underway.

A Reo 25 Series on period-style tires should be driven at moderate, conservative speeds that respect both the tire design and the capabilities of the car itself. Even when the tires are new, they are intended to preserve the original driving character rather than turn the car into a modern highway machine. Bias-ply behavior, braking distance, steering response, and road crown sensitivity all deserve respect.

In practical terms, drive a Reo 25 Series at the pace the car feels composed and mechanically happy, not at the pace of surrounding modern traffic. Smooth inputs and extra following distance matter more than outright speed. If the route requires sustained high-speed travel, it may not be the right route for the car.