28X4.40 Tire Size Guide

The 28X4.40 size uses a flotation-style format in which 28 is the tire's overall diameter in inches and 4.40 is its section width in inches. For this size, that means a tire about 28.0 inches tall and about 4.4 inches wide at its widest sidewall point.

Unlike a modern P-metric size, 28X4.40 does not directly spell out an aspect ratio, load index, or speed symbol in the size code itself. The format is centered on outside diameter and width, so buyers need to look beyond the basic code and confirm the actual wheel, service rating, and physical clearance before treating it as a substitute for a later tire size.

The 28X4.40 tire has a section width of 4.4 inches, which converts to about 111.8 millimeters. Section width is the broadest point across the sidewalls after inflation, not the width of the tread where the tire contacts the road.

Clearance work should focus on section width because sidewall bulge is what usually comes closest to suspension parts, inner fenders, and brake hardware. Tread width is usually narrower, so using tread alone can give a false sense of available space. On an antique or specialty fitment, that makes sidewall-to-body and sidewall-to-chassis checks especially important.

The 28X4.40 tire has an overall diameter of 28.0 inches, or about 711.2 millimeters. In this sizing format, overall diameter is one of the main pieces of information built into the code itself.

Overall diameter matters because it affects ride height, wheel-opening fill, and the visual stance of the vehicle. It also changes how far the vehicle travels in one tire revolution, which can influence indicated speed and gearing feel. When owners compare 28X4.40 to another size, diameter is usually the first number that should be matched as closely as practical.

The outside diameter of the 28X4.40 tire is 28.0 inches. That converts to about 711.2 millimeters and represents the full height of the inflated tire from the ground to the top of the tread.

With flotation-style sizing, outside diameter is not a side detail; it is one of the two key dimensions named in the code. Buyers comparing replacements should keep that in mind, because even a modest change in overall height can alter body-to-tire proportions, wheel-opening appearance, and rolling relationship to the rest of the vehicle.

The 28X4.40 tire turns approximately 720.3 revolutions per mile. That figure is based on its calculated circumference of 87.96 inches.

Revolutions per mile help explain how tire diameter affects speedometer and odometer behavior. A tire that turns more times per mile is effectively shorter, while one that turns fewer times per mile is effectively taller. On older vehicles and specialty setups, that can influence not only indicated speed but also the way the vehicle feels geared on the road.

The 28X4.40 is consistent with antique-era sizing practice and appears on late-1920s vehicle applications such as the Erskine 50 Series. Its bias-ply construction also matches the type of carcass design commonly associated with older vehicles of that period.

Restoration accuracy still depends on the exact vehicle, wheel, and intended standard of authenticity. Some owners want a tire that simply fits and looks right, while others need a size and construction that align closely with factory-era practice. Checking original manuals, surviving tire placards, and wheel dimensions is the best way to confirm whether the 28X4.40 is appropriate for a particular restoration.

The 28X4.40 can serve as a comparison point when replacing another flotation-style or antique size, but it should not be treated as a universal replacement answer on size code alone. Its key dimensions are about 28.0 inches in overall diameter and 4.4 inches in section width.

Replacement decisions should be based on more than the printed code. Buyers should compare wheel fit, overall height, sidewall clearance, steering clearance, and the visual stance they want to preserve. On older vehicles, small dimensional changes can be more noticeable because wheel openings are narrow and suspension travel can bring the tire close to surrounding parts.

The most important checks for the 28X4.40 are wheel compatibility, overall diameter, section width, and full-arc clearance during steering and suspension movement. Because this size code emphasizes outside diameter and width, it gives only part of the fitment picture.

Owners should inspect the actual wheel being used, compare the tire's 4.4-inch width against nearby hardware, and confirm that the 28.0-inch height will clear the body and chassis throughout travel. On antique and specialty applications, wheel design and rim details can vary more than the tire code suggests, so a hands-on measurement check is smarter than relying on the size designation alone.

The 28X4.40 uses bias-ply construction, which generally gives a distinctly vintage driving character compared with later radial designs. Steering feel, straight-line tracking, and sidewall response tend to reflect the older carcass layout that antique vehicles were originally built around.

Drivers should expect the overall experience to depend on more than construction alone. Suspension condition, steering play, alignment, wheel condition, load carried, and tire age all influence how a bias-ply tire behaves on the road. For a restoration-minded owner, the appeal of the 28X4.40 is often that it preserves the period feel rather than trying to modernize it.

At about 28.0 inches tall, the 28X4.40 has a direct effect on how an antique or specialty vehicle sits and how far it travels per wheel rotation. Its approximately 720.3 revolutions per mile give a useful reference point when comparing a substitute size.

A taller replacement usually lowers engine speed for a given road speed, while a shorter one usually raises it. Stance changes can also show up quickly because older vehicles often have visibly narrow fender openings and upright proportions. Matching diameter closely is the best way to preserve both the visual balance and the road-speed relationship of the original setup.

The 28X4.40 can be used on today's roads when the tire, wheel, and vehicle are in proper condition, but buyers should approach it as an antique-style bias-ply size rather than as a modern passenger-car fitment. Its road manners will reflect the expectations of an earlier design.

Modern drivability depends on tire age, inflation condition, alignment, brake condition, steering integrity, and the loads the vehicle actually carries. Before regular road use or longer trips, inspect the tires carefully and confirm that the wheel and vehicle setup are appropriate. Owners choosing this size are usually prioritizing correct proportions and vintage character over contemporary tire behavior.

The most important factors when choosing the 28X4.40 are accurate overall dimensions, sound bias-ply construction, and suitability for the actual wheel and vehicle being used. On an antique-size tire, small differences in fit or profile can matter more than marketing language.

Quality selection should focus on whether the tire preserves the intended stance, clears the chassis correctly, and matches the owner's goal for originality. A good 28X4.40 choice is one that fits the wheel system properly, carries the vehicle's required load, and delivers consistent sizing across the full set rather than introducing visible mismatch from corner to corner.

Yes, construction matters with the 28X4.40 because bias-ply design is part of what defines the size's character and expected use. It affects the way the tire looks on the wheel, the way the sidewall behaves, and the type of driving feel the owner can expect.

For antique and collector applications, bias ply is often chosen because it stays closer to the appearance and behavior associated with older vehicles. A buyer who wants factory-style visual proportions may value that strongly, while a buyer focused on general utility still needs to confirm that the construction matches the vehicle's wheel, service demands, and intended road use.

Matched-set consistency is especially important with the 28X4.40 because antique-size tires are visually prominent and small dimensional differences can stand out quickly. Variations in overall height or sidewall profile can affect both appearance and the way the vehicle sits.

Using a consistent set helps preserve balanced stance, predictable handling feel, and a more uniform restoration result. Owners should compare construction type, dimensional accuracy, and service details across all four tires rather than mixing unrelated builds. On a narrow antique fitment, even slight inconsistencies can show up in fender gap, steering response, and general road manners.

The 28X4.40 should be inspected regularly for cracking, cuts, bulges, uneven wear, and any loss of air pressure. Age matters even when tread still looks usable, especially on a bias-ply tire that may spend part of its life on an antique or specialty vehicle.

Owners should examine both sidewalls, the tread surface, and the bead area before road use and especially before longer drives. Time, heat, sunlight, moisture, and ozone exposure can all degrade rubber and internal structure. A tire that looks acceptable from a distance may still be due for replacement once close inspection begins to show age-related deterioration.

The 28X4.40 should be stored away from direct sunlight, electric-motor ozone, excessive heat, and standing moisture when the vehicle is parked for extended periods. Clean, dry, stable conditions help reduce age-related rubber damage on bias-ply tires.

Collector vehicles benefit from periodic movement and regular pressure checks during storage rather than being left untouched indefinitely. If the vehicle will sit for a season, inspect the tires before it goes back on the road and look closely for flat spotting, sidewall cracking, or air loss. Proper storage helps preserve both appearance and service life, but it does not stop aging entirely.

Routine care for the 28X4.40 starts with regular air-pressure checks, visual inspection, and attention to wear patterns. A bias-ply tire can wear unevenly if alignment, steering components, or wheel condition are not kept in good order.

Drivers should also watch for vibration, pull, or irregular tread wear, since those symptoms often point to vehicle issues rather than the size itself. Keeping suspension and steering parts in proper condition helps the tire do its job more evenly. On an older vehicle, longevity often depends as much on mechanical health and storage habits as on miles driven.

The 28X4.40 should be replaced when inspection shows cracking, bulges, exposed cord, persistent air loss, impact damage, or age-related deterioration, even if tread depth still appears acceptable. Tire condition matters more than appearance alone on an antique-size bias-ply fitment.

Before road use, especially after long storage, inspect the entire tire closely and consider how old it is, how it has been stored, and whether it still suits the vehicle's intended use. A collector vehicle that sees limited mileage can still be riding on aged rubber. Replacement timing should be based on condition, service demands, and professional inspection when needed.

The key safety checks for the 28X4.40 are tire condition, wheel compatibility, air retention, visible sidewall health, and physical clearance through steering and suspension travel. Because this format centers on outside diameter and width, the printed size is only part of the safety picture.

Buyers should confirm that the actual wheel and tire combination is appropriate, then inspect the assembly before regular road use or longer trips. Antique and specialty applications can have wheel details that are not obvious from the tire code alone. Careful hands-on verification is more valuable than assuming the size designation answers every roadworthiness question.

No tire size is automatically suitable for every road-use situation simply because the code matches a vehicle. The 28X4.40 should be evaluated by its current sidewall markings, condition, construction, load suitability, and wheel compatibility before being put into service.

Local requirements and inspection expectations can vary, so owners should review the tire's actual markings and confirm that the full wheel-and-tire system is appropriate for the vehicle. Road use decisions should also account for age, storage history, and intended driving speed and distance. A correct-looking antique size still needs to be treated like a real safety component.