The 1926 Reo 6 Cyl. comes from the mature pre-war touring era, when American motorists expected dependable road manners on a wide range of surfaces and tire design was still closely tied to wheel and rim construction. For a vehicle of this age, tire selection is as much about preserving proper fitment and visual character as it is about simply replacing old rubber. The 1926 Reo 6 Cyl. uses bias-ply fitments in 30X5.77 and 30x5, both tied to early tire-sizing conventions. That makes construction style and exact size interpretation especially important. A careful choice starts with confirming which of these two period-style sizes matches the wheels currently on the car.
Which Tire Size Is Right for The 1926 Reo 6 Cyl.
The 1926 Reo 6 Cyl. uses two primary tire sizes, and choosing between them starts with confirming the exact wheel setup on the car. Both fitments are bias-ply and both relate to early-era tire standards, so the key decision is not just overall size but whether the vehicle is set up for the 30X5.77 flotation-style fitment or the 30x5 beaded-edge style.
In the size 30X5.77, the first number refers to an approximate 30-inch overall tire diameter, while 5.77 identifies the tire's nominal section width. This is a bias-ply fitment associated here with a flotation or light-truck style format, and it uses a 7-inch rim diameter. On a vehicle such as the 1926 Reo 6 Cyl., that makes wheel confirmation especially important because early tire systems were not as standardized as later sizing formats. This size is best evaluated by matching the car's existing wheel type and preserving the proper period-style relationship between tire and rim.
The size 30x5 also uses an antique diameter-by-section format, with 30 indicating approximate outside diameter and 5 referring to nominal section width. It is a bias-ply fitment and is associated with an antique inch, beaded-edge style presentation rather than a later modernized sizing system. For a 1926 Reo 6 Cyl., that distinction matters because a beaded-edge setup requires attention to the wheel design already on the car. This size is the one to consider when the goal is maintaining compatibility with an earlier wheel and tire arrangement rather than simply matching diameter alone.
The covered sub-model fitment is straightforward in name, but the tire choice still requires care because the Base configuration is associated with two different period-style sizes. Checking the actual wheel and tire setup on the vehicle matters more than the sub-model badge alone.
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1926 Reo 6 Cyl. Base
The 1926 Reo 6 Cyl. Base is associated with both 30X5.77 and 30x5 bias-ply tires, so the deciding factor is the wheel and rim style fitted to the car today. That makes selection less about trim level and more about preserving the correct early-era tire system for restoration appearance and safe mechanical compatibility.
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.
Frequently Asked Questions
Common questions for the 1926 Reo 6 Cyl. usually center on interpreting these early tire sizes, confirming the wheel type, and choosing a period-appropriate bias-ply fitment that suits restoration goals and careful road use.
Tire Size & Fitment
What tire size fits a 1926 Reo 6 Cyl.?
The 1926 Reo 6 Cyl. is associated with two primary bias-ply tire sizes: 30X5.77 and 30x5. Those sizes belong to two different early tire conventions, even though both share an approximate 30-inch overall diameter, so the correct choice depends on the wheel and tire system fitted to the vehicle.
That means the first step is to inspect the wheels already on the car rather than choosing by diameter alone. On an early vehicle, rim design, bead style, and the existing restoration setup can matter just as much as the printed size itself. A close check of the wheel before replacement helps avoid selecting a tire that matches in name but not in actual application.
What size rim does a 1926 Reo 6 Cyl. use?
The 30X5.77 fitment for the 1926 Reo 6 Cyl. uses a 7-inch rim diameter. The vehicle is also associated with a 30x5 bias-ply size, which belongs to an earlier beaded-edge style format, so wheel design matters alongside rim diameter when sorting out the correct tire.
A tape measure and a close visual inspection of the wheel are both useful before ordering tires for a car of this age. Early wheels can be changed during restoration, and the current setup may not match what another 1926 Reo 6 Cyl. is using. Verifying both the wheel diameter and the type of rim helps narrow the choice between the two supported tire sizes.
Does the 1926 Reo 6 Cyl. Base use the same tire size?
The 1926 Reo 6 Cyl. Base is associated with both supported tire sizes rather than a single dedicated fitment. Those sizes are 30X5.77 and 30x5, and both are bias-ply tires tied to early-era wheel and tire systems.
That makes the Base model less about trim-specific tire variation and more about confirming what is physically on the vehicle today. On a restored or long-preserved car, wheels may have been changed over time, and that can determine which size is appropriate. Looking at the existing tire markings and wheel construction is the most practical way to sort out the right replacement path.
Choosing the Right Tire
What should I consider when choosing a 30X5.77 or 30x5 tire for a 1926 Reo 6 Cyl.?
Start with the correct tire system, not just the closest-looking size. A 1926 Reo 6 Cyl. can use either 30X5.77 or 30x5, and both are bias-ply fitments, but they represent different early sizing conventions and may correspond to different wheel types.
The better choice depends on the wheels currently fitted, the kind of restoration presentation you want, and how the car will be used. Matching the proper size format helps preserve the intended stance and avoids forcing a tire onto an incompatible rim. Once the wheel setup is confirmed, the next priority is selecting a sound period-style bias-ply tire suitable for careful collector-vehicle driving.
How do I choose between the available 1926 Reo 6 Cyl. tires?
The main choice is between the two supported sizes, not between modernized constructions or a wide spread of product styles. For the 1926 Reo 6 Cyl., selection comes down to whether the car is set up for 30X5.77 flotation-style bias-ply tires or 30x5 beaded-edge style bias-ply tires.
A useful approach is to treat the wheel as the starting point and the appearance goal as the second filter. Owners aiming for an authentic early look often want the tire format to match the era of the wheel as closely as possible. Owners focused on road readiness should also inspect the whole chassis and wheel condition so the tire choice supports the vehicle's actual mechanical setup.
What does 30x5 mean on a 1926 Reo 6 Cyl.?
On a 1926 Reo 6 Cyl., 30x5 is an antique diameter-by-section size. The 30 refers to the tire's approximate outside diameter in inches, while the 5 refers to nominal section width, and this fitment is associated with an antique beaded-edge style bias-ply application.
That differs from later alphanumeric, numeric bias-ply, and modern radial systems, so it should not be treated as a casual cross-reference to a newer size. The practical takeaway is that the wheel style and bead arrangement need to match the tire design. A buyer restoring an early Reo should verify the wheel construction first, then use the printed tire size as part of that larger compatibility check.
Restoration & Appearance
Which tire should I choose for a period-style 1926 Reo 6 Cyl.?
For a period-style 1926 Reo 6 Cyl., the right starting point is one of the two supported bias-ply sizes already associated with the vehicle: 30X5.77 or 30x5. The choice between them depends on the wheel and rim system on the car, especially because 30x5 is tied to a beaded-edge style application.
A restoration-minded choice should preserve the proper relationship between the tire, wheel, and overall presentation rather than chasing a modern substitute. If exact originality is the goal, period photos, marque-club guidance, and restoration records can help confirm which of the two fitments best suits the car's current configuration. That approach protects both appearance and mechanical compatibility.
Does correct tire fitment matter for a 1926 Reo 6 Cyl. restoration?
Correct tire fitment matters a great deal on a 1926 Reo 6 Cyl. because the vehicle sits in an era when tire and wheel design were closely linked. Choosing between 30X5.77 and 30x5 is not just a sizing exercise; it affects whether the tire matches the style of wheel the car is actually using.
A visually similar tire can still look out of place or create compatibility concerns if the wheel type is wrong for the tire design. For a restoration, proper fitment helps maintain the car's stance, proportions, and period character. It also reduces the risk of treating an early beaded-edge style setup as though it were interchangeable with a later rim arrangement.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1926 Reo 6 Cyl.?
Yes. Modifications can change tire fitment on a 1926 Reo 6 Cyl., especially because early vehicles are often restored, re-wheeled, or updated over many decades. A wheel change alone can determine whether the car should use 30X5.77 or 30x5, even though both sizes are associated with the same vehicle.
Beyond wheel type, suspension work, brake changes, or body adjustments can also alter clearance and the way a tire sits on the car. That is why a visual inspection of the entire setup matters before replacement. Matching the tire to the vehicle's present configuration is more useful than assuming every surviving Reo still carries the same components it had long ago.
What should I inspect before driving a 1926 Reo 6 Cyl. on new tires?
Before road use, inspect the wheels, lug hardware, valve stems, and the seating of each tire on the rim. On a 1926 Reo 6 Cyl., it is also wise to check steering travel, fender clearance, brake operation, and overall chassis condition because tire replacement is only one part of making an early car road ready.
Collector vehicles often spend long periods parked, so rubber parts, wheel components, and suspension pieces can age even when mileage stays low. Tire pressure should be set consistently, and the vehicle should be driven carefully at first while watching for pull, vibration, or rubbing. A short shakedown run can reveal issues before committing the car to a longer trip.
How should 1926 Reo 6 Cyl. tires be maintained?
Tires on a 1926 Reo 6 Cyl. should be kept clean, properly inflated, and inspected regularly for cracking, cuts, bulges, flat spotting, and signs of air loss. Because this is a collector-era vehicle, maintenance also includes watching for age-related deterioration that may not show up immediately in tread depth alone.
Storage conditions make a real difference on older bias-ply tires. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources can help preserve the rubber between drives. Routine checks before each outing are worthwhile, especially on a low-use vehicle, and any doubt about tire condition or wheel compatibility should be resolved before putting the Reo back on the road.
