The 1930 Reo 25 Series comes from the late coachbuilt era, when tire profile, sidewall presentation, and wheel fitment all played a visible role in how a car sat and drove. For owners of a pre-war Reo, the tire decision is often as much about preserving the vehicle’s character as preparing it for careful road use. This model uses bias-ply fitments, with 30X6.20 and 650-18 both associated with the 18-inch wheel setup. Available 650-18 choices include traditional blackwall and wide whitewall Firestone Balloon tires. The key is confirming which size is on the car now and matching that choice to the wheel, appearance, and intended use.
Which Tire Size Is Right for The 1930 Reo 25 Series
The 1930 Reo 25 Series uses two primary tire sizes, and both are bias-ply fitments tied to an 18-inch wheel setup. Because the Base sub-model is associated with both sizes, the first step is confirming which size is actually on the car today before choosing a tire by sidewall style, appearance, and wheel compatibility.
30X6.20 is an antique diameter-by-section size, meaning the first number refers to the tire’s approximate overall diameter and the second number refers to its approximate section width in inches. On a 1930 Reo 25 Series, it represents a period-style bias-ply fitment suited to the car’s pre-war wheel and tire presentation. This format is especially relevant to restoration-minded owners because it reflects an earlier sizing convention than later numeric bias-ply markings. Before choosing it, confirm the wheel and the existing tire markings on the vehicle so the replacement matches the setup already in service.
650-18 is a numeric bias-ply size in which 6.50 refers to nominal section width in inches and 18 refers to rim diameter. For the 1930 Reo 25 Series, this is a traditional bias-ply option available in Firestone Balloon form with either blackwall or wide whitewall sidewall treatment. Those choices give the buyer a meaningful appearance decision without leaving the correct vintage size family. It is a strong size to evaluate when the car already carries 650-18 tires or when the goal is a traditional pre-war tire profile on an 18-inch rim.
Sub-model fitment is straightforward here because the covered 1930 Reo 25 Series Base is associated with the same two bias-ply tire sizes used for the model line. The important step is not choosing between trims, but confirming which size is already mounted on the car’s 18-inch wheels.
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1930 Reo 25 Series Base
The 1930 Reo 25 Series Base is associated with both 30X6.20 and 650-18 bias-ply tire sizes. That makes the selection process less about trim differences and more about verifying the wheel setup, the markings on the current tires, and the appearance you want to maintain.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1930 Reo 25 Series Tires for Sale
Available 650-18 choices center on Firestone Balloon bias-ply tires, with both blackwall and wide whitewall sidewall treatments. The main comparison points in the product grid are sidewall appearance, rim-width compatibility, weight, and whether maximum load information is included.
These 1930 Reo 25 Series tire FAQs focus on the two primary bias-ply sizes, 18-inch wheel fitment, sidewall choices, restoration-minded selection, and the checks worth making before putting a pre-war car back on the road.
Tire Size & Fitment
What tire size fits a 1930 Reo 25 Series?
The 1930 Reo 25 Series is associated with two primary bias-ply tire sizes: 30X6.20 and 650-18. Both sizes belong to the vintage fitment range for this model, and the covered Base sub-model is associated with both rather than having a separate trim-specific size.
That means the practical job is confirming which size is actually on the car before ordering replacement tires. Check the sidewall markings on the existing tires, confirm the wheel diameter, and make sure the replacement matches the wheel and overall setup already in use on the vehicle.
What size rim does a 1930 Reo 25 Series use?
The 1930 Reo 25 Series uses an 18-inch rim diameter with its primary tire fitments. The 650-18 size states that rim diameter directly, and the model’s fitment summary keeps the vehicle within the same 18-inch wheel family.
Rim diameter is only one part of the fitment check on a pre-war vehicle. It is still important to confirm the wheel itself, inspect the current tire markings, and make sure the wheel width and tire size combination stay in line with the setup already on the car.
What does 650-18 mean on a 1930 Reo 25 Series?
650-18 is a vintage numeric bias-ply size. The 6.50 refers to nominal section width in inches, while 18 identifies the rim diameter, so this size is intended for an 18-inch wheel and keeps the car in a traditional pre-war bias-ply fitment type.
For a 1930 Reo 25 Series owner, that size code matters because it helps separate a later modern radial marking from the original style of tire sizing. It also helps narrow the product choice to the correct vintage family before comparing blackwall versus wide whitewall appearance and wheel compatibility.
Choosing the Right Tire
What should I consider when choosing a 650-18 tire for a 1930 Reo 25 Series?
Start with the basics: confirm that 650-18 is the size already used on the car, then stay with a bias-ply construction that matches this vintage fitment type. From there, the meaningful differences are sidewall style, rim-width compatibility, tire weight, and whether the tire includes a stated maximum load figure.
A restoration-oriented car may call for a different visual presentation than a driver-focused car, even within the same size. Matching the tire to the wheel and intended use is more important than choosing by appearance alone, especially on an older vehicle that may have changed hands and hardware over time.
What sidewall styles are available for 1930 Reo 25 Series tires?
For the 1930 Reo 25 Series, the available 650-18 bias-ply options include both blackwall and wide whitewall sidewall styles. Both are offered within the Firestone Balloon line, so the main visual choice is between a more understated traditional black sidewall and a more prominent whitewall presentation.
That choice affects the car’s overall stance and period character more than its fitment category. Owners focused on historical appearance often compare sidewall style carefully, while road-use buyers still need to confirm the correct size and wheel setup first so appearance does not override proper fitment.
What brands offer tires for the 1930 Reo 25 Series?
Current product coverage for the 1930 Reo 25 Series centers on Firestone in the 650-18 size. The available tires are part of the Firestone Balloon series, with both blackwall and 3.50 inch wide whitewall versions represented for this vintage bias-ply fitment.
Since the brand choice here is narrow, the bigger buying decision is really the tire presentation and specification details within that same family. Compare sidewall treatment, wheel-width suitability, weight, and any stated load information rather than assuming that brand alone resolves the fitment decision.
What tire series are available for the 1930 Reo 25 Series?
The available 650-18 product line for the 1930 Reo 25 Series is the Firestone Balloon series. That keeps the selection focused within a traditional pre-war bias-ply style rather than spreading it across several unrelated tire families with very different looks.
Because the series choice is concentrated, owners can pay closer attention to the presentation details within it. Sidewall style becomes especially important, and the tire should still be matched carefully to the wheel dimensions and the exact size already in service on the car.
Restoration & Appearance
Which tire should I choose for a period-style 1930 Reo 25 Series?
A period-style 1930 Reo 25 Series should stay within its primary bias-ply fitment family, using either 30X6.20 or 650-18 depending on the wheel and tire setup on the car. That keeps the tire choice aligned with the vehicle’s era and avoids introducing a modern-looking size format into a pre-war presentation.
Once the correct size is confirmed, appearance becomes the next decision. A blackwall and a wide whitewall can give the same car very different visual character, so buyers pursuing historical accuracy should compare surviving photos, marque references, or other vehicle-specific restoration material before finalizing the look.
Does correct tire fitment matter for a 1930 Reo 25 Series restoration?
Correct tire fitment matters a great deal on a 1930 Reo 25 Series restoration because tire size and construction are highly visible on a pre-war car. The stance, sidewall shape, and overall presentation can change noticeably when the tire does not match the vintage sizing family used on the vehicle.
Fitment also affects how confidently the restoration comes together mechanically. Confirming the wheel diameter, checking the tire size already associated with the car, and selecting the right sidewall style will usually do more for the finished result than chasing cosmetic details before the basics are settled.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1930 Reo 25 Series?
Yes, modifications can affect tire fitment on a 1930 Reo 25 Series, even when the car stays within the correct vintage tire size family. Changes such as different wheels, altered wheel width, brake updates, suspension work, or body and fender adjustments can change how much room the tire has.
That is why the car should be checked as it sits today rather than assumed to match original dimensions. A close look at wheel diameter, wheel width, steering clearance, and body clearance helps prevent ordering a tire that is correct in size code but mismatched to the vehicle’s present setup.
What should I inspect before driving a 1930 Reo 25 Series on new tires?
Before driving a 1930 Reo 25 Series on new tires, inspect the wheels, valve hardware, and overall mounting condition, then make sure the tires are properly inflated and seated. It is also worth checking for free steering movement, adequate fender clearance, and any visible interference at full lock.
A pre-war car often spends long periods parked, so the inspection should go beyond the tires alone. Look over suspension wear, wheel fastener security, brake condition, and any signs that the car has shifted from its normal ride height, since those issues can affect how the new tires behave on the road.
How should 650-18 tires on a collector 1930 Reo 25 Series be maintained?
650-18 tires on a collector 1930 Reo 25 Series should be kept clean, properly inflated, and inspected regularly for cracking, cuts, bulges, uneven wear, and slow air loss. A collector car that sees limited miles still needs routine tire attention because age and storage conditions can matter as much as road use.
Storage habits make a real difference with vintage bias-ply tires. Keeping the car away from prolonged sunlight, moisture, and ozone sources helps preserve the rubber, and occasional checks of the wheel and tire condition are smart even when the Reo is not being driven frequently.
