Reo 20 Series Tires

Reo 20 Series uses two listed tire sizes for 1930: 30X6.00 and 6.00-18. The first is an antique diameter-by-section size, while the second is a numeric size built around an 18-inch rim diameter. Those are not simply two ways of writing the same measurement, so they should be treated as different fitment paths.

The practical step is to inspect the car rather than rely on the model year alone. Check the size marking on the existing tire if it is still legible, then compare that with the wheel itself and any restoration paperwork or period service information that came with the car.

On a Reo 20 Series, 30X6.00 is an antique-style size code. The 30 refers to the tire's approximate overall outside diameter in inches, and the 6.00 refers to nominal section width. It does not state the wheel diameter in the way a modern tire size does.

That matters because a buyer can easily mistake the first number for the rim size, which would be incorrect. If your Reo 20 Series carries 30X6.00, confirm the actual wheel dimensions before selecting a replacement, especially on a car that may have been altered during earlier restoration work.

A 1930 Reo 20 Series can show 30X6.00 and 6.00-18 because the model falls in a period when manufacturers and owners were moving between older tire notation and later numeric rim-based sizing. Those two listings reflect different fitment conventions rather than a simple duplicate entry.

Use the listed year as a starting point, then identify the actual configuration on your car. Original wheels, replacement wheels, and long-ago service changes can all affect what is fitted today, so visual inspection and comparison to trusted marque references are the safest way to sort it out.

Reo 20 Series includes one size that clearly identifies an 18-inch rim, which is 6.00-18. The 30X6.00 size does not reveal rim diameter in the size code because antique diameter-by-section sizing uses outside diameter and section width instead of naming the wheel size directly.

That means you should not assume both options fit the same wheel. Measure the wheel or confirm it through original service literature, especially if the car has changed hands several times or carries wheels that may not be the ones it left the period with.

The most direct way to confirm the right tire size for a 1930 Reo 20 Series is to start with the wheel and any surviving tire markings on the car. Since both 30X6.00 and 6.00-18 are associated with 1930, the year by itself does not settle the question.

A careful owner should compare the existing setup with factory literature, restoration records, or a knowledgeable Reo specialist. That process helps separate an original-style fitment from a later substitution and reduces the chance of choosing a tire that matches the year but not the actual wheel equipment.

The Reo 20 Series information here identifies size coverage rather than a broad spread of named tire series. What matters most on this application is the distinction between the earlier diameter-by-section style represented by 30X6.00 and the later numeric rim-based style represented by 6.00-18.

For a buyer, that means fitment choice begins with wheel and size convention rather than with a long list of series variations. Once the correct size family has been established, period appearance and construction style can be weighed against the car's intended use, whether that is touring, local driving, or show presentation.

The Reo 20 Series size information here does not depend on a single brand, because the critical issue is identifying the correct size family for the car first. On collector vehicles from this era, size accuracy and proper wheel match matter more than choosing by brand name alone.

Once the tire size has been settled, compare available brands by construction style, period appearance, and how closely they suit the role of the car. A touring-oriented Reo 20 Series may call for different priorities than a concours restoration, even when both use the same nominal size.

A Reo 20 Series should be stored in a cool, dry, dark space with the tires kept away from sunlight, ozone sources, solvents, and electric motors. Clean tires and wheels before storage, keep inflation appropriate for storage conditions, and avoid leaving the full vehicle weight on one contact patch for long periods.

Collectors often improve tire life by moving the car occasionally or supporting it in a way that reduces flat spotting without putting the suspension in an unnatural position. Because Reo 20 Series sits in an early collector era, careful storage habits make a noticeable difference in appearance, ride quality, and long-term serviceability.

Tires on a Reo 20 Series should be inspected before every drive and more thoroughly at regular intervals during the season. Look for sidewall cracking, tread separation, cuts, irregular wear, valve stem deterioration, and any shift in how the tire sits on the wheel.

That routine matters even more on collector cars that spend long periods parked between outings. A Reo 20 Series may look fine at a glance but still develop age-related issues, so periodic hands-on inspection by an experienced collector-car tire specialist is a wise part of ownership.

A Reo 20 Series tire should be replaced when age, cracking, cord exposure, bulging, repeated air loss, or structural changes appear, even if the tread still looks usable. On an early collector car, visible tread depth alone is a poor measure of tire health because aging often shows up in the casing first.

Owners should think in terms of condition, storage history, and specialist inspection rather than trying to wear a tire out in the modern sense. If a Reo 20 Series has sat for years or has uncertain service history, replacement is often the more prudent path before any regular road use.

Reo 20 Series is associated here with two period-appropriate size paths for 1930: 30X6.00 and 6.00-18. That tells a restorer that original-era fitment cannot be reduced to a single universal answer for every 1930 Reo 20 Series without checking the specific car's wheel setup and surviving reference material.

For an accurate restoration, use the car's own evidence first: wheel dimensions, old photographs, service records, and factory or club literature. That approach is especially important on orphan marques such as Reo, where previous owners may have made practical substitutions that look old but are not necessarily original to the car.

Correct tire fitment can absolutely affect how a Reo 20 Series is judged and how seriously a restoration is taken. Judges and knowledgeable enthusiasts notice whether the tire size, profile, and overall visual character suit the year and configuration of the car, particularly on vehicles from transitional periods like 1930.

Even outside formal judging, proper tire fitment influences stance, wheel-well appearance, and historical credibility. If the goal is authenticity, it is worth matching the car to the right size convention rather than choosing whichever tire happens to be easiest to source in roughly similar dimensions.

The correct sidewall style for a Reo 20 Series restoration depends on the exact look being pursued and the era character of the car. Early 1930s American restorations can legitimately call for a conservative blackwall presentation, while some show-oriented restorations may seek a more visually prominent period appearance if an appropriate sidewall style is offered in the selected size.

The best choice is the one that matches the car's original presentation standard, body style, and judging target. Owners restoring a Reo 20 Series for marque authenticity should compare the tire's sidewall treatment with period photos and trusted club guidance so the finished car looks coherent rather than merely old-fashioned.

A properly selected and correctly fitted tire can make a Reo 20 Series suitable for limited public-road use, but safety depends on far more than the tire alone. Wheel condition, brake performance, steering play, alignment, and the general mechanical health of the car all matter on an early 1930 vehicle.

Most owners should think in terms of careful local driving rather than modern highway expectations. A Reo 20 Series needs to be driven within the limits of its chassis, tire type, and age, with enough caution to account for longer stopping distances and more deliberate handling than a contemporary car.

Before driving a Reo 20 Series, check tire inflation, visible sidewall condition, tread condition, wheel security, and whether the tire size on the car matches the intended wheel setup. A quick review of brake function, steering response, fluid levels, and any unusual vibration or lean is just as important.

That pre-drive routine is especially valuable on a collector car that may sit for weeks between outings. A few minutes in the garage can reveal age-related tire trouble, a loose wheel component, or a mismatch between wheel and tire that would be easy to miss if the car is only driven occasionally.

Appropriate speed for a Reo 20 Series on original-type tires is best thought of as moderate, conservative touring speed rather than sustained modern traffic pace. The car's era, suspension design, braking capability, and tire construction all point toward restrained use even when the tires are in good condition.

Owners should let road conditions, mechanical condition, and tire age guide their pace instead of assuming the car can comfortably keep up with present-day highway flow. A Reo 20 Series is most enjoyable when driven within its period character, where steering feel, braking margin, and tire behavior remain predictable.