The 1926 Jewett 6 Cyl. came from the middle of the American pre-war touring era, when practical six-cylinder cars were expected to handle daily roads that were far less uniform than modern pavement. Tire choice on a car of this age is closely tied to preserving the right stance, wheel compatibility, and period character. The 1926 Jewett 6 Cyl. uses bias-ply fitments in two vintage size formats: 29X4.75 and 4.75-20. That means the main decision is less about modern tire categories and more about confirming which wheel setup is on the car and selecting a period-style bias-ply tire that suits restoration goals and road use.
Which Tire Size Is Right for The 1926 Jewett 6 Cyl.
The 1926 Jewett 6 Cyl. uses two primary tire sizes, and the first step is confirming which wheel setup is on the car. Both fitments are bias-ply, but they are not interchangeable descriptions of the same thing, because they point to different rim diameters. Before choosing a tire, verify the actual wheel diameter on the vehicle and make sure the Base sub-model's current wheels match the size being considered.
29X4.75 is an antique diameter-by-section size, meaning the first number refers to the tire's approximate overall diameter and the second refers to its section width. On the 1926 Jewett 6 Cyl., this is a bias-ply fitment intended for an early vintage wheel setup, and it should be approached as a true pre-war sizing format rather than a modern rim-based passenger-car size. Its appeal is largely restoration-oriented, since this format preserves the look and proportions associated with cars from the mid-1920s. Choose this size only after confirming that the vehicle is actually equipped for the wheel diameter tied to this fitment.
4.75-20 is a numeric bias-ply size in which 4.75 represents the nominal section width in inches and 20 identifies the rim diameter. For a 1926 Jewett 6 Cyl., this format reflects a more familiar vintage bias-ply sizing convention and places wheel diameter at the center of the selection process. It is the better reference point for owners who are verifying fitment from the wheel inward rather than interpreting an antique overall-diameter size marking. Evaluate this size when the car carries 20-inch rims and the goal is to stay with a traditional bias-ply presentation appropriate to the era.
Fitment is straightforward here because the covered 1926 Jewett 6 Cyl. sub-model uses the same pair of primary bias-ply size references. Checking the exact sub-model still helps, but wheel diameter remains the more important confirmation before selecting a tire.
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1926 Jewett 6 Cyl. Base
The 1926 Jewett 6 Cyl. Base uses the same vintage bias-ply fitment pattern covered here, with both 29X4.75 and 4.75-20 associated with the model. The practical decision is confirming which wheel setup is actually on the car, then choosing a period-style tire that matches the vehicle's restoration direction and intended driving use.
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
These 1926 Jewett 6 Cyl. tire questions focus on vintage size interpretation, wheel-diameter confirmation, bias-ply fitment, restoration-minded selection, and the basic inspection steps that matter before putting a low-use pre-war car back on the road.
Tire Size & Fitment
What tire size fits a 1926 Jewett 6 Cyl.?
The 1926 Jewett 6 Cyl. uses two primary bias-ply tire sizes: 29X4.75 and 4.75-20. Those sizes belong to different vintage sizing conventions, so the correct choice depends on the wheel setup actually installed on the car rather than treating the two markings as a single interchangeable fitment.
A buyer should start by checking the wheel diameter on the vehicle and confirming how the existing tires are marked. On a pre-war car, wheels may have been changed over time, and the safest path is to match the tire size to the actual rim and overall setup before moving on to appearance or restoration preferences.
What size rim does a 1926 Jewett 6 Cyl. use?
The 1926 Jewett 6 Cyl. is associated with two rim diameters through its tire fitments: 5.0 inches with 29X4.75 and 20.0 inches with 4.75-20. That makes wheel verification essential, because the tire size you choose must match the rim diameter the car is wearing now.
Many cars from the 1920s have lived long restoration lives, and wheels are one of the areas most likely to vary from car to car. Measure the rim carefully, inspect the markings on the wheel if present, and compare them to the tire size before ordering a replacement for road use or display.
What does 29X4.75 mean on a 1926 Jewett 6 Cyl.?
On a 1926 Jewett 6 Cyl., 29X4.75 is an antique diameter-by-section size. The 29 refers to the tire's approximate overall diameter, while 4.75 refers to its section width. It is a bias-ply format used on early vehicles and differs from later numeric bias-ply sizing that centers more clearly on rim diameter.
That difference matters because a modern buyer may assume every vintage tire code works like a later passenger-car size, which is not the case here. Before selecting 29X4.75, confirm that the car's wheels match the setup tied to that size and that the tire's proportions suit the vehicle's existing stance and clearance.
Choosing the Right Tire
What should I consider when choosing a tire for a 1926 Jewett 6 Cyl.?
Start with the exact tire size and wheel diameter on the car, because the 1926 Jewett 6 Cyl. uses two vintage bias-ply fitments: 29X4.75 and 4.75-20. Once that is confirmed, the next priorities are staying within the correct vintage size convention and choosing a tire that supports the car's intended appearance and driving use.
A restoration-oriented Jewett may benefit from a tire that preserves a traditional pre-war presentation, while a regularly driven car still needs the same careful fitment discipline. Compare the existing wheel setup, look at overall condition of the suspension and steering, and avoid treating one vintage size format as an automatic substitute for the other.
How do I choose between 29X4.75 and 4.75-20 for a 1926 Jewett 6 Cyl.?
The right choice comes down to the wheel setup on the specific 1926 Jewett 6 Cyl. 29X4.75 is an antique diameter-by-section bias-ply size, while 4.75-20 is a numeric bias-ply size built around a 20-inch rim. They should be treated as separate fitment paths, not as two labels for the same tire.
Check the wheel diameter first, then compare the current tires and the car's overall presentation. On a long-restored or modified pre-war vehicle, assumptions can lead to ordering the wrong size, so it helps to inspect the rims directly and verify that the selected tire maintains appropriate clearance and visual balance.
Why does the 1926 Jewett 6 Cyl. have more than one tire size?
The 1926 Jewett 6 Cyl. appears with two primary bias-ply sizes because vintage vehicles often straddle older and newer tire-marking conventions. Here, 29X4.75 uses an antique diameter-by-section format, while 4.75-20 uses a numeric bias-ply format tied to a 20-inch rim.
That does not mean both sizes belong on every car without further checking. Over many decades, wheel changes, restoration choices, and earlier replacement practices can leave one surviving example different from another, so the practical answer is to verify the installed rims and existing tire markings before choosing a replacement.
Restoration & Appearance
Which tire should I choose for a period-style 1926 Jewett 6 Cyl.?
For a period-style 1926 Jewett 6 Cyl., the right starting point is the correct bias-ply size for the wheel setup on the car, either 29X4.75 or 4.75-20. Both belong to vintage sizing systems that suit a pre-war presentation much better than treating the car like a later passenger vehicle.
Appearance matters on a 1920s car because tire profile and overall proportion strongly affect stance. If historical accuracy is especially important, compare the tire choice against marque references, restoration photos, and surviving vehicle details so the finished result supports the Jewett's era without relying on guesswork.
Does correct tire fitment matter for a 1926 Jewett 6 Cyl. restoration?
Correct tire fitment matters a great deal on a 1926 Jewett 6 Cyl. because tire size influences not only road use but also the car's stance, wheel presentation, and overall visual authenticity. A pre-war car can look noticeably wrong if the tire format or wheel-diameter relationship is off, even when the difference seems small on paper.
The best restoration results come from matching the tire to the actual wheels and the character of the build, whether that is preservation, touring, or show-oriented work. Careful fitment also helps avoid clearance issues and keeps the car's proportions closer to what buyers and enthusiasts expect from a mid-1920s six-cylinder automobile.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1926 Jewett 6 Cyl.?
Yes. Modifications can change tire fitment on a 1926 Jewett 6 Cyl., especially if the car has replacement wheels, altered suspension components, brake conversions, or body and fender work done over the years. On an early vehicle, even a small change in wheel setup can alter which vintage tire size makes sense.
Check the installed rim diameter and width first, then inspect steering lock clearance, fender space, and the overall stance of the car. A Jewett that has been restored or updated at different points in its life should be measured as it sits now rather than assumed to follow one standard tire setup.
What should I inspect before driving a 1926 Jewett 6 Cyl. on new tires?
Before driving a 1926 Jewett 6 Cyl. on new tires, inspect the wheels, valve stems, and the seating of the tire on the rim, then confirm that the tires clear fenders and steering components through their full range of movement. On a pre-war car, it also makes sense to check bearings, suspension joints, and brake condition.
Collector vehicles often spend long periods parked, so road-readiness involves more than fresh rubber. Look for sidewall rubbing, uneven ride height, looseness in steering parts, and any signs of air loss after installation. A cautious shakedown drive at low speed can reveal issues before the car is taken farther from home.
How should tires on a collector 1926 Jewett 6 Cyl. be maintained?
Tires on a collector 1926 Jewett 6 Cyl. should be inspected regularly for cracking, cuts, bulges, flat spotting, and air loss, even if the car is driven only occasionally. Vintage cars can spend long periods in storage, and tire condition can decline with age and environment long before tread wear becomes the main concern.
Keep the car stored away from prolonged sunlight, excess heat, moisture, and ozone sources such as electric motors or battery chargers. Regular pressure checks and occasional movement help reduce stress on the tires, and any sign of sidewall deterioration or persistent pressure loss deserves attention before the car returns to normal road use.
