1926 Elcar Tire Fitment Guide

1926 Elcar vehicles use four sizes across three models, all in bias-ply construction and all on 20-inch rims. The 55 Series and 65 c use 30X5.25 and 5.25-20, while the 80 Series uses 30X5.77 and 650-20. Within the listed products, 650-20 fits 20-inch rims and Firestone specifies a 3.00 to 5.00 inch rim width range for that size.

The practical takeaway is that year and make alone are not enough for a 1926 Elcar tire decision. Start by identifying whether you have a 55 Series, 65 c, or 80 Series, then confirm whether you are matching the antique diameter-by-section size or the corresponding later numeric size. Once that is settled, compare the actual wheel width and the individual tire's dimensions before moving ahead.

On a 1926 Elcar, 30X5.25 is an antique diameter-by-section tire size. The first number, 30, refers to the approximate overall tire diameter in inches, while 5.25 refers to the nominal section width. That size belongs to the 55 Series and 65 c and represents the earlier style of sizing notation common in the mid-1920s.

Understanding that format helps you avoid confusing the first number with rim diameter. A 30X5.25 tire still mounts on a 20-inch wheel in this Elcar application, so the code is describing the tire's outside dimensions rather than the wheel first. If your car currently wears a numeric size on the same wheel, compare the sidewall marking carefully before choosing between the antique-size expression and the later numeric one.

On a 1926 Elcar, 650-20 is a numeric bias-ply size. The 6.50 figure indicates the nominal section width in inches, and the 20 indicates the wheel diameter. In this year and make, 650-20 is associated with the 80 Series rather than the 55 Series or 65 c.

That distinction matters because a numeric size can look more familiar to modern buyers, yet it is still a period-style bias-ply fitment rather than a later radial metric size. If you own an 80 Series, 650-20 is the size family with the clearest current product selection here, including both blackwall and wide-whitewall choices. If you own one of the smaller Elcar models, stay with the sizes intended for that chassis instead.

For a 1926 Elcar 55 Series or 65 c, both 30X5.25 and 5.25-20 are bias-ply sizes on 20-inch wheels. The difference is largely the sizing convention: 30X5.25 uses the older diameter-by-section format, while 5.25-20 uses the later numeric width-and-rim format. Neither choice changes the car into a radial application, so the comparison is about matching the right size family for the car and the presentation you want.

Owners leaning toward a restoration-minded look often prefer the antique-style marking because it aligns closely with mid-1920s tire language. Owners who are matching an existing set, a spare, or a wheel setup already using numeric sidewall markings may prefer 5.25-20 instead. The best approach is to inspect the tires or period paperwork already associated with your car and keep all five tires in the same size family.

Sidewall style variety appears in the listed 650-20 offerings for 1926 Elcar 80 Series applications. Firestone offers both Blackwall and a 3.75-inch Wide Whitewall in that size, while Denman and Deka are shown as Blackwall choices. That gives 80 Series owners a traditional dark-sidewall option and a more formal whitewall presentation within the same size family.

For a late-1920s luxury-leaning American car such as an Elcar, sidewall treatment changes the car's visual personality as much as the tire size itself. Blackwalls usually suit a more restrained or utility-minded look, while a wide whitewall creates a more upscale presentation that many restorers associate with premium period styling. If the car is being judged, verify the expected sidewall style with an Elcar specialist or event rules before finalizing the set.

The listed 1926 Elcar product selection shows Firestone, Denman, and Deka in 650-20 for the 80 Series size family. Firestone appears in both Blackwall and Wide Whitewall versions, while Denman and Deka appear as Blackwall offerings. All of those listed products are bias-ply tires suited to the period character of a 1926 Elcar.

Brand choice on a collector car usually comes down to the appearance you want, the sidewall style you need, and whether you are trying to echo a broad period look rather than chase a specific original brand. Firestone has especially strong recognition in the American vintage market, while Denman and Deka can appeal to owners looking for a more straightforward blackwall presentation. Once the model and size are confirmed, compare the actual specifications of the individual tire rather than choosing by brand name alone.

Rim width guidance is shown in the listed 1926 Elcar 650-20 products, where Firestone specifies a 20-inch rim with an acceptable width range of 3.00 to 5.00 inches. That specification applies to the 80 Series numeric size family. Every size used across 1926 Elcar models mounts on a 20-inch rim, but wheel width still needs to match the tire being considered.

That means diameter alone is only part of the fitment picture. Before selecting a tire, measure the actual wheel or confirm the wheel specification already on the car, especially if the vehicle has been restored long ago or mixed with parts from another model. Staying inside the tire maker's approved wheel-width range helps preserve proper casing shape, bead seating, and overall road manners.

The listed 1926 Elcar products do not carry tube-type or tubeless sidewall markers in the size descriptions, so the point to remember is that mid-1920s wood-wheel and demountable-rim applications are commonly treated as tube-type in practice. All sizes here are bias-ply and belong to a pre-war wheel environment where tube use is often part of the overall setup rather than an afterthought.

The safest approach is to confirm the exact wheel construction on your Elcar and then match the tube decision to the specific tire and rim combination you plan to use. If the wheel condition, lock ring arrangement, or rim profile raises any doubt, have the assembly reviewed by a shop experienced with pre-war wheels. Tube, flap, and valve-stem compatibility should be settled before the tires are mounted.

All listed 1926 Elcar tire sizes mount on 20-inch wheels, so the original wheel diameter is consistent across the 55 Series, 65 c, and 80 Series. That does not mean every 20-inch Elcar wheel is interchangeable across all models, because the tire size families themselves are split between the smaller 55/65 pair and the larger 80 Series pair. Wheel width and the intended model still matter.

For an owner working with original wheels, the smart move is to treat diameter compatibility as only the first checkpoint. Verify that the wheel width and overall tire size family match the model the wheel came from, especially if the car has accumulated spare parts over decades. A 20-inch wheel can accept the wrong tire family just as easily as the right one if you skip those checks.

A stored 1926 Elcar should be kept in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment that can age sidewalls. Bias-ply tires are especially prone to flat-spotting when they sit in one position for long periods, and long static storage also encourages sidewall checking if the environment is harsh.

For best results, keep the tires properly inflated, roll the car periodically, or support it in a way that reduces constant load if it will be parked for months at a time. Clean the tires with mild soap and water rather than dressings that leave a glossy residue. If the car is stored with full wheel covers or fender skirts that hide the tires, uncover them occasionally so you can inspect the sidewalls.

On a collector car such as a 1926 Elcar, tire age usually matters more than mileage. Even tires that still show good tread should be evaluated regularly once they reach about five to seven years of service, and around the ten-year mark many owners begin planning replacement regardless of how little the car has been driven. The DOT date code on the tire helps establish age on modern reproductions.

That guideline matters because antique and classic cars often cover very few miles each year, which can hide aging rubber behind a respectable-looking tread surface. If the Elcar has spent long periods parked, age-related cracking, casing stiffness, and tube or valve-stem deterioration may become the real replacement triggers. A low-usage touring car still deserves age-based tire planning before any serious road miles.

Tires on a 1926 Elcar should be inspected before every drive and again before any longer outing. Look closely for sidewall cracking, cuts, bulges, irregular wear, embedded objects, and any sign that the tire has been run underinflated. On a pre-war setup, the valve stem and any tube-related hardware deserve the same attention as the outer casing.

That routine matters because collector cars often go from long storage directly to road use, and age-related problems can appear with little warning once the tire flexes and warms up. Include the spare in the inspection, since roadside support on a 1920s car depends on having a usable backup. If the car wanders, shimmies, or suddenly feels heavy in one corner, stop and recheck the tires before continuing.

A 1926 Elcar 55 Series would originally have used bias-ply tires, because radial passenger-car fitments were not part of normal American production practice in that era. The sizes associated with the 55 Series here are 30X5.25 and 5.25-20, both on 20-inch wheels. The antique-size and numeric-size expressions reflect period tire sizing conventions rather than a modern construction change.

For an accurate restoration, the key is matching the car to the proper size family and sidewall presentation for its market and body style rather than chasing a modern substitute. If you are preparing the car for formal judging, confirm the exact expected size notation and whitewall treatment with an Elcar club, period sales literature, or event-specific judging standards. Original-brand assumptions should be treated cautiously unless supported by period evidence for your exact car.

Correct tire fitment matters on a 1926 Elcar because judges and knowledgeable enthusiasts often notice tire size, construction type, and sidewall style immediately. A mid-1920s Elcar belongs in a bias-ply visual and historical context, and an obviously later-style tire can change the stance and character of the car even before anyone looks deeper into the restoration.

What gets flagged depends on the event, but common issues include the wrong size family for the model, a sidewall treatment that does not suit the car's presentation, or a construction style that departs from period expectations. Even when a tire is mechanically usable, it may not be the most authentic choice for concours or marque judging. Event rules and marque-club guidance should always have the final word for a points restoration.

A 1926 Elcar 80 Series would also have been fitted with bias-ply tires as part of standard period practice. The sizes associated with that model are 30X5.77 and 650-20, both intended for 20-inch wheels. Those two notations reflect the larger tire family used on the 80 Series rather than the smaller pair shared by the 55 Series and 65 c.

For restoration work, that means the 80 Series should be treated as its own fitment branch within the 1926 Elcar lineup. If the car is being presented as a formal, higher-end touring or sedan restoration, sidewall style becomes part of the authenticity conversation along with the size itself. A marque specialist can help you determine whether blackwall or whitewall presentation is most appropriate for your specific body and restoration goal.

Bias-ply tires for a 1926 Elcar can be used on public roads when they are in good condition, properly mounted, correctly inflated, and matched to sound wheels. The listed 650-20 products do not show modern speed-rating letters, so they should be approached as period-style tires for a pre-war automobile rather than as modern high-speed touring tires. On a 1926 car, chassis condition, braking ability, steering accuracy, and wheel integrity are usually just as important as the tire itself.

That means reasonable road use is less about chasing modern highway expectations and more about operating the car within its mechanical comfort zone. If the Elcar will see sustained faster driving, inspect the tires carefully beforehand and keep speeds appropriate to the vehicle's age, suspension design, and stopping distance. A properly sorted antique car can be enjoyable on the road, but it should never be driven as though it were a modern sedan.

Inflation pressure for a 1926 Elcar should be matched to the specific tire size and the vehicle's intended loading, not borrowed from another size in the range. In the listed 650-20 Firestone products, the maximum load figure is 2120 pounds at 60 psi. That is a tire rating, not automatically the day-to-day operating pressure for every 1926 Elcar using a 20-inch tire.

The best practice is to start with the factory guidance in period owner or service literature for your exact model, then compare that with the tire maker's published limits for the specific reproduction tire you are using. Do not transfer a pressure figure from 650-20 to 30X5.25, 5.25-20, or 30X5.77. On an antique car, even a small pressure error can change steering effort, ride quality, and tread wear noticeably.

Before a longer drive in a 1926 Elcar, inspect every tire for cracking, cuts, bulges, uneven wear, proper inflation, and secure valve stems, and make sure the spare is usable as well. Because these are period-style bias-ply fitments on a pre-war car, also check wheel condition, rim hardware, and the security of any demountable components. A tire issue on an antique car is often tied to the wheel and tube system as much as the casing itself.

A longer outing is also the right time to look beyond the tires to the rest of the car's age-sensitive systems. Verify steering play, brake operation, wheel bearing condition, and the basic readiness items that make a 1920s car dependable on the road. Tires should be part of a broader pre-drive routine, because even the correct size will not compensate for neglected mechanical condition elsewhere on the Elcar.