By 1926, Reo was an established independent American automaker known for building practical, well-engineered cars in the heart of the pre-war era. A 1926 Reo buyer today is usually preserving a six-cylinder touring or sedan-era automobile where authenticity, stance, and road manners all depend heavily on choosing the right tire format. For 1926 Reo, one model uses two bias-ply sizes, so the decision is less about make-wide model differences and more about identifying which original sizing convention matches your particular car and wheels. Before choosing a tire, confirm whether your 1926 Reo 6 Cyl. calls for 30X5.77 or 30x5 and verify the wheel it mounts on.
Which Tire Size Is Right for Your 1926 Reo
Two tire sizes are available for 1926 Reo vehicles, and both apply to the 1926 Reo 6 Cyl. The real choice is confirming which period-correct bias-ply size your car uses, since these are not interchangeable size labels in the modern sense and should be matched to the correct wheel before selecting a tire. Understanding that distinction first helps narrow the right tire quickly and keeps the fitment process on track.
30X5.77 is an antique diameter-by-section size, with 30 indicating overall tire diameter and 5.77 indicating section width in an early sizing convention, and it is built as a bias-ply tire. This size is specific to the 1926 Reo 6 Cyl., with a single bias-ply fitment path rather than multiple construction or sidewall variations to sort through. It is the size to pursue when your car is equipped for 30X5.77 and you want to stay aligned with the period look and response expected of a 1920s Reo.
30x5 is also an antique diameter-by-section size, where 30 denotes overall tire diameter and 5 denotes section width, and the construction is bias-ply. This size is specific to the 1926 Reo 6 Cyl., and it represents a different early-era size designation rather than a modern optional upgrade path with varied speed or tube configurations. It suits a restoration that is being matched to the car's actual wheel and original sizing practice, so confirming the tire marking already associated with the vehicle is the key step.
One model is covered for 1926 Reo. Even with a single model in the range, tire size still matters because the 6 Cyl. was fitted with two period bias-ply size conventions rather than one universal label, so identifying the exact size used on your car comes before choosing a tire. Select the model below for model-specific fitment history and products.
1926 Reo 6 Cyl.
The 1926 Reo 6 Cyl. reflects Reo's place in the mid-1920s market, offering smooth six-cylinder power in a practical American passenger-car package. For tire selection, the important distinction is that this model appears with both 30X5.77 and 30x5 antique bias-ply sizing, so the correct choice depends on the wheel and existing fitment on the individual car rather than on a separate Reo model line.
These FAQs cover the two antique bias-ply sizes used on 1926 Reo cars, how to tell which one belongs on a Reo 6 Cyl., and what to check for authenticity, storage, and safe road use on a low-mileage pre-war automobile.
Size Basics & Fitment
What tire sizes fit 1926 Reo vehicles?
1926 Reo vehicles use two tire sizes: 30X5.77 and 30x5. Both sizes apply to the 1926 Reo 6 Cyl., and both are bias-ply designs from the antique era rather than modern metric or alphanumeric sizes. Because the full model range here consists of one six-cylinder Reo model, the fitment question is not about choosing between different Reo body lines but about confirming which of the two original size designations belongs on your individual car.
The practical takeaway is to inspect the wheels already on the car, check any surviving tire markings, and compare them with factory literature or marque-club references before selecting a tire. Early size labels can look similar while representing different fitment standards, so matching the exact size on the vehicle matters more than assuming any 1926 Reo tire will interchange.
What does 30X5.77 mean on a 1926 Reo tire?
On a 1926 Reo tire, 30X5.77 is an antique diameter-by-section size. The 30 refers to the tire's overall diameter, while 5.77 refers to the nominal section width in an early sizing system used well before today's metric formats. It is a bias-ply tire designation, so the casing uses crisscrossed body plies typical of the period.
That means 30X5.77 should be treated as a specific early fitment standard, not as a modern shorthand that can be casually substituted with another 30-inch tire. If your Reo is set up for 30X5.77, stay with that exact designation unless a knowledgeable Reo specialist confirms otherwise, because wheel compatibility and period-correct appearance both depend on matching the original size convention.
What does 30x5 mean on a 1926 Reo tire?
On a 1926 Reo tire, 30x5 is another antique diameter-by-section size. The first number, 30, identifies overall tire diameter, and the second number, 5, identifies nominal section width. Like 30X5.77, it is a bias-ply format from the 1920s and does not translate directly into a modern passenger-car size.
For a 1926 Reo owner, the important point is that 30x5 is its own fitment choice, not simply a shorthand version of 30X5.77. The safest path is to verify the existing wheel and any surviving original references tied to the car, then keep the tire size consistent across the set so the Reo retains correct proportions, steering feel, and restoration character.
Buying the Right Tire
Should I choose the 30X5.77 or the 30x5 for my 1926 Reo?
A 1926 Reo owner should choose between 30X5.77 and 30x5 by matching the car's actual wheel and original size application, not by treating one as a modernized version of the other. Both sizes are bias-ply and both belong to the same pre-war design era, so the issue is correct fitment and authenticity rather than choosing between an old-style tire and a newer radial alternative.
Start by checking the size already associated with the car, then confirm it against restoration references specific to the 1926 Reo 6 Cyl. If the car is being restored for historical accuracy, exact size matching matters. If the car is a driver, consistency and safe wheel compatibility matter just as much, so avoid mixing the two sizes unless a marque expert has confirmed that combination for your application.
What brands make tires for 1926 Reo vehicles?
Only the tire sizes themselves are established here for 1926 Reo vehicles, and both of those sizes belong to the bias-ply antique category used on 1920s American cars. The important buying point for a Reo owner is less about chasing a broad list of modern brands and more about finding a reproduction tire built in the correct antique format for either 30X5.77 or 30x5.
That keeps the search focused on proper vintage construction and dimensions rather than on modern touring-tire comparisons that do not apply to a 1926 car. Once you have confirmed which size your Reo uses, compare the available offerings in that exact size for period-correct appearance, then verify the wheel and mounting requirements before moving ahead.
What sidewall styles are available for 1926 Reo tires?
A 1926 Reo sits squarely in the pre-war era, when sidewall appearance plays a major role in how authentic the finished car looks. For a car of this age, buyers usually focus on whether the tire visually suits a 1920s American passenger-car restoration rather than looking for modern styling cues. The right sidewall treatment should complement the car's era and intended presentation, especially if the Reo will appear at shows or historical events.
That makes it worthwhile to decide early whether your goal is a strict restoration or a more casual touring presentation. Once the correct size is confirmed, compare the sidewall look offered in that size against period photos, marque references, and the overall finish of the car. Sidewall appearance can change the visual character of a 1926 Reo almost as much as the body color or wheel finish.
Fitting & Setup
Do 1926 Reo tires require inner tubes?
A 1926 Reo uses antique-era bias-ply tire sizes, and vehicles from this period commonly rely on tube-type fitment practices. With early wheel and tire systems, the tube question matters because it affects mounting procedure, valve hardware, and ongoing inspection habits. On a car this old, tube compatibility should be checked along with the tire size itself rather than treated as a minor detail.
Before mounting tires on a 1926 Reo, verify the wheel type, the tire's sidewall marking, and the valve-stem arrangement you intend to use. If the car has older wheels or newly restored rims, inspect the interior finish carefully so a fresh tube is not damaged during installation. A tire specialist familiar with pre-war fitments can help confirm the right setup for safe service.
What rim width do 1926 Reo tires require?
The key wheel question for 1926 Reo tires is matching the correct antique size to the wheel the car actually carries. Both 30X5.77 and 30x5 are early-era fitments, and antique tires are less forgiving of casual substitution than many later sizes. On a 1920s Reo, rim width and tire designation should be considered together so the mounted tire keeps its intended shape and seating behavior.
Use the wheel on the car as your starting point and compare it against the requirements of the exact tire size you plan to run. If the car has been restored, verify that the wheels were not changed at some point in its life. That extra check is worthwhile because an early car can wear wheels that look correct at a glance while still being wrong for the tire size stamped on the sidewall.
Maintenance, Storage & Longevity
How should I store a 1926 Reo when the tires are fitted?
A stored 1926 Reo should be kept in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone sources that accelerate sidewall aging. Bias-ply tires on a low-use pre-war car can develop flat-spotting more readily during long static periods, especially if the car sits in one position on cold concrete or a damp floor.
Keep the tires properly inflated, move the Reo periodically, and consider stands if the car will be parked for an extended season. Clean, dry wheel and tire surfaces help as much as climate control. If the car remains on its tires, rolling it a short distance from time to time can reduce prolonged stress in one contact patch and help preserve a smoother ride when driving resumes.
How long do tires on a 1926 Reo typically last?
Tires on a 1926 Reo should be judged more by age and condition than by mileage. Collector cars often see very limited use, so tread depth can look excellent long after the rubber has started to harden or crack. A sensible rule is to begin careful evaluation around five to seven years of service and to treat roughly ten years as a serious replacement checkpoint, regardless of how little the car has been driven.
Check the tire's date coding if available and inspect the sidewalls, tread base, and bead areas regularly. A Reo that only appears at occasional events can still age its tires quietly in storage. Replacing older tires before visible failure is part of preserving both the car and the driving experience, especially on an automobile whose suspension and braking were designed in the 1920s.
How often should tires on a 1926 Reo be inspected?
Tires on a 1926 Reo should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, uneven wear, and signs that the tire is losing pressure between uses. On an antique fitment, it is also wise to inspect valve stems and, where applicable, tube-related sealing components because slow leaks can be more noticeable after the car has been parked.
A quick walk-around before each drive is usually enough to catch the biggest problems early. Before a tour or club event, give the tires a more careful hands-on check and inspect the spare as well. That routine matters on a 1926 Reo because old-car breakdowns are easier to prevent in the garage than to solve on the roadside with fragile vintage hardware.
Restoration & Authenticity
What tires were originally fitted to the 1926 Reo 6 Cyl.?
The 1926 Reo 6 Cyl. belongs to an era when bias-ply construction was standard, and the sizes associated with it are 30X5.77 and 30x5. That places the car firmly in the antique tire world, where exact size designation matters for both appearance and wheel compatibility. A specific original-equipment brand should only be claimed when supported by surviving factory material or proven period evidence tied to the individual car.
For restoration work, start with the correct bias-ply size rather than trying to modernize the fitment language. Then compare your car's surviving wheels, any old tires, and period literature to determine whether it should wear 30X5.77 or 30x5. Reo club resources and marque specialists are especially useful here because 1920s production practice could vary by body style, market, or later service replacement history.
Does correct tire fitment matter for showing a 1926 Reo?
Correct tire fitment matters a great deal when showing a 1926 Reo, especially in judged classes that value historical accuracy. On a pre-war car, judges and knowledgeable enthusiasts often notice whether the tire size, construction type, and overall sidewall look suit the period. Running the wrong antique size can affect the car's stance and visual proportions just as much as using an incorrect wheel finish or trim detail.
A show-oriented owner should verify the exact size first, then choose a tire that preserves the car's 1920s character. Event standards can differ, so marque clubs and judging manuals are the right places to confirm what a specific organization considers acceptable. Even outside concours settings, correct fitment usually gives the Reo a more convincing and balanced appearance than a loosely substituted vintage-looking tire.
Why is bias-ply construction important on a 1926 Reo?
Bias-ply construction is important on a 1926 Reo because it reflects the technology the car was built around. Steering effort, ride character, sidewall shape, and overall appearance on a pre-war automobile were all designed with bias-ply tires in mind. Since both tire sizes associated with the 1926 Reo 6 Cyl. are bias-ply, staying within that construction type preserves the period-correct look and feel expected of the car.
For a restoration, that matters visually and historically. For a driver, it also means setting expectations correctly: an antique Reo on bias-ply tires will not behave like a later radial-equipped collector car, and it should not be judged by modern steering or tracking standards. Matching the car's original construction type is one of the simplest ways to keep the whole package coherent.
Safety & Road Use
Are 1926 Reo tires safe for highway driving?
1926 Reo tires can be used safely within the limits of the exact tire selected, the condition of the car, and the driving environment, but a 1920s automobile must always be approached with pre-war expectations. Bias-ply antique tires are part of that equation, yet the broader mechanical package often matters just as much. Steering geometry, brake capability, wheel condition, and chassis wear are all major factors in how confidently a 1926 Reo should be driven at sustained road speeds.
Treat tire selection as one element of overall roadworthiness rather than the whole answer. Before regular highway use, make sure the Reo tracks properly, stops evenly, and carries sound wheels and fresh rubber in the correct size. Owners who plan frequent longer drives should have the entire car evaluated so the tire choice supports a chassis that is equally ready for the road.
What inflation pressure should I use for 1926 Reo tires?
Inflation pressure for 1926 Reo tires should follow the vehicle's original guidance and the individual tire manufacturer's recommendations for the exact antique size being used. Because 30X5.77 and 30x5 are distinct early-era fitments, pressure should never be borrowed casually from another vintage size or from a later collector car. Correct pressure is essential to preserve casing shape, ride quality, and wear pattern on a bias-ply tire.
The best approach is to confirm the tire size first, then compare your owner's literature, restoration references, and the current tire maker's guidance for that exact application. Once the tires are mounted, recheck pressure regularly because low-use antique cars can sit long enough for pressure loss to go unnoticed. Proper inflation also helps the Reo steer more predictably and sit correctly on its tires.
What should I check before taking a 1926 Reo on a longer drive?
Before a longer drive in a 1926 Reo, inspect every tire for cracking, cuts, bulges, exposed fabric, irregular wear, and signs of air loss. Check valve stems carefully and include the spare, since a roadside backup is especially important on a pre-war car. If the wheels have not been used recently, look over the rims and fastening hardware as well so the tire is being supported by sound vintage components.
That tire inspection should happen alongside a broader old-car check of brakes, steering, wheel bearings, fluids, and cooling system condition. A 1926 Reo rewards preparation, and most touring problems show warning signs before the car leaves the garage. Taking a few extra minutes with the tires first helps ensure the rest of the drive starts from a solid foundation.
