30X4.95 Tire Size Guide

The 30X4.95 size identifies a flotation-style tire by overall diameter and section width. In this case, 30 means the tire is about 30 inches tall overall, and 4.95 refers to an approximate 4.95-inch section width, with the tire built for a 5-inch rim in this format.

Unlike a modern P-metric code, the 30X4.95 does not directly show an aspect ratio, load index, or speed symbol in the size itself. Buyers usually read this type of code to preserve original height and visual proportions, especially on antique and specialty applications where stance, wheel-opening fill, and wheel diameter matter more than modern sizing conventions.

The 30X4.95 fits a 5.00-inch wheel diameter, which is 127.00 millimeters. On this size, the leading 30 refers to the tire's outside diameter, not the wheel size, so the wheel must still be a true 5-inch bead-seat diameter.

Wheel diameter is the one dimension that cannot be approximated or forced. A tire in this size will not seat correctly on any other wheel diameter, even if the tire's overall height and width seem close. Before mounting, confirm the actual wheel dimensions and inspect the rim condition carefully, especially on older wheels that may have been repaired, worn, or altered over time.

The 30X4.95 is about 4.90 inches wide at the section, which is approximately 124.46 millimeters. Section width measures the tire at its widest point from sidewall to sidewall when inflated, not the width of the tread that touches the road.

Clearance checks should use section width first because the sidewall bulge is what tends to contact fender edges, steering arms, springs, or brake parts. Tread width is usually narrower, so relying on tread alone can understate how much room the tire really needs. On antique vehicles with tight front clearances, that distinction can make a noticeable difference.

The 30X4.95 has an outside diameter of 30.00 inches, or 762.00 millimeters. That overall height is one of the defining parts of this size and is central to how the vehicle sits, how the wheel opening looks, and how the gearing feels on the road.

Overall diameter matters because even a small change in height can alter stance, fender gap, and speedometer behavior. On antique cars and specialty builds, the diameter is often just as important as the width because the visual profile of the tire contributes heavily to a correct period look. When comparing substitute sizes, start with diameter before looking at any other measurement.

The 30X4.95 turns about 672.3 revolutions per mile. That figure comes from the tire's overall circumference and gives a practical reference point for how often the tire rotates over a fixed distance.

Revolutions per mile matter most when you are comparing one size to another. A different revs-per-mile figure can affect speedometer and odometer readings and can also subtly change how the vehicle feels geared at road speed. On older vehicles, where driveline ratios and engine speed are already part of the driving character, that comparison is worth checking before changing sizes.

The 30X4.95 can be a very appropriate choice when an antique vehicle originally used a tall, narrow tire on a small wheel diameter. Its bias-ply construction and 30-inch overall height support the kind of stance and sidewall shape many early vehicles were designed around.

Restoration accuracy still depends on more than the sidewall code alone. Compare the original vehicle documentation, wheel diameter, and installed clearance, and look closely at how the tire fills the fender opening. If the vehicle is being restored for judged authenticity, the construction type, proportions, and overall visual profile should all be reviewed together rather than treating size alone as the full answer.

The most important checks for the 30X4.95 are wheel diameter, overall diameter, section width, and physical clearance at full steering lock and suspension movement. Because this size is 30 inches tall and about 4.9 inches wide, both height and sidewall shape can affect fitment on older chassis.

Start by confirming that the wheel is truly a 5-inch diameter design intended for this style of tire. Then inspect room around fenders, tie rods, leaf springs, and brake components, since antique vehicles often have less predictable clearances than later cars. Tire age, wheel condition, and suspension wear can all influence final fit as much as the size code itself.

The 30X4.95 should be treated as a comparison point, not a universal replacement answer. Similar-looking antique tire sizes can differ in wheel diameter, section width, or actual mounted profile, and those differences can affect fit, appearance, and steering clearance.

Buyers are usually best served by comparing original documentation, current wheel dimensions, and the tire's overall height before making a substitution. Two tires can share a broadly similar vintage look yet change the car's stance or leave too little room at the front axle. On restoration work, preserving the right proportions often matters just as much as simply finding a tire that will physically mount.

The 30X4.95 uses bias-ply construction, which typically gives a more vintage driving character than a comparable radial. Expect more sidewall influence in the way the vehicle tracks and responds, along with the traditional ride feel many antique owners want to preserve.

Steering response, straight-line tracking, and road feel depend not only on construction but also on alignment, suspension wear, wheel condition, load, and tire age. On an early vehicle, bias-ply behavior is often part of the authentic experience rather than a drawback by itself. Drivers returning to antique motoring after time in modern vehicles should be ready for a distinctly different feel.

A 30-inch-tall, relatively narrow tire like the 30X4.95 has a strong effect on how an antique vehicle sits and drives. The tall overall height helps preserve original wheel-opening fill, while the slim section keeps the visual profile upright and period-appropriate.

On the road, those proportions can influence steering effort, gearing feel, and ride character more than many buyers expect. A taller tire changes the relationship between engine speed and road speed, while a narrow section can make the vehicle feel more sensitive to crown and surface changes. Those traits are common parts of the experience on early cars and specialty vintage builds.

The 30X4.95 may be used on today's roads when the tire is in proper condition and matched to the vehicle's actual needs, but buyers should approach it as a vintage-style fitment rather than a modern all-purpose replacement. Its bias-ply construction and antique proportions produce a different driving experience from later radial designs.

Road behavior depends heavily on vehicle setup, brake condition, alignment, steering play, and how the vehicle is loaded. For owners who plan longer trips, routine use, or higher sustained speeds, it is wise to inspect tires carefully and confirm that the chosen size and construction still match the vehicle's intended use. Condition matters as much as size on older applications.

A quality 30X4.95 tire should first match the vehicle's required dimensions and intended use. On a size like this, accuracy in overall height, section width, and bead fit matters because antique vehicles often have limited clearance and rely on the tire's proportions for their correct appearance.

Construction quality also matters because bias-ply tires influence ride and handling more noticeably than many later radial sizes. Buyers should compare the tire's stated dimensions, intended application, and consistency across a full set rather than focusing on looks alone. For restoration work, the best choice is often the one that balances visual correctness with dependable fit on the actual wheels being used.

Matched-set consistency is important with the 30X4.95 because antique vehicles are sensitive to differences in height, profile, and construction feel from corner to corner. Even small variations can change how the vehicle sits, steers, and presents visually, especially on narrow early wheels and fenders.

Uniform construction and dimensions help keep the car level and preserve predictable behavior at road speed. When replacing fewer than four tires, compare the remaining tires closely for age, size markings, wear pattern, and actual profile. On a restoration, replacing the full set is often the cleaner way to maintain both visual balance and a more consistent driving character.

Bias-ply construction is often the right choice for the 30X4.95 when the goal is to preserve antique appearance and original-style road manners. The construction itself is part of what gives this size its period look, especially on early vehicles that were designed around tall, narrow tires.

Choosing the right tire is not only about authenticity, though. Buyers should also think about how often the vehicle will be driven, what road conditions it sees, and whether the rest of the chassis is set up for vintage-style behavior. A well-made bias-ply tire in the correct size is usually the strongest starting point when originality and proper proportions matter most.

The 30X4.95 should be inspected regularly for cracking, bulges, cuts, air loss, and uneven wear, even if the tread still looks usable. On older or collector vehicles, tire aging can become a concern long before the tread is worn out, especially when the vehicle is driven infrequently.

Heat, sunlight, ozone exposure, long periods of sitting, and repeated underuse can all shorten service life. Check the sidewalls and bead area closely, and inspect before tours, events, or longer road drives rather than relying on appearance alone. A tire that looks acceptable from a distance can still have age-related deterioration that affects how confidently it should be used.

Routine care for the 30X4.95 starts with maintaining proper inflation for the actual tire and vehicle combination, keeping the wheels in good condition, and watching for irregular wear. Clean storage conditions and periodic inspection matter, but so does regular use that avoids long stretches of sitting in one spot.

Bias-ply tires can develop flat spotting or shape memory when a vehicle stays parked for extended periods. Move the vehicle occasionally, keep it away from direct sunlight and ozone sources, and inspect the tread and sidewalls after any long storage interval. Good maintenance is less about one single step and more about preventing age, environment, and neglect from working together.

The 30X4.95 should have its air pressure checked on a routine schedule and before longer drives, seasonal outings, or any event where the vehicle will be used more than usual. Antique vehicles and older wheel systems can be more sensitive to pressure loss than owners expect.

Consistent inflation helps the tire maintain its shape, carry the vehicle properly, and wear more evenly. Use the actual tire and vehicle requirements rather than guessing from appearance, since a tall, narrow tire can still look reasonably full when pressure is not where it should be. If a tire repeatedly loses air, inspect the wheel, valve hardware, and tire condition together.

The 30X4.95 should be replaced when inspection shows cracking, cord exposure, bulges, persistent air loss, impact damage, or irregular wear that points to structural problems. On antique applications, age alone can also become a replacement factor even when tread depth still appears acceptable.

Vintage-size tires often spend part of their life in storage, which means time and environment can matter as much as mileage. Before using an older tire on public roads, examine the full tire closely and think about the kind of driving planned. A collector vehicle that only goes short distances still depends on sound tire condition for basic roadworthiness.

Before using the 30X4.95 on public roads, buyers should verify wheel diameter, tire condition, clearance, and the vehicle's actual load needs. On a vintage-size bias-ply tire, those checks matter more than assuming any tire with the same broad dimensions will behave the same way.

Review the tire's current sidewall markings, inspect the wheel for damage or corrosion, and make sure the tire suits the way the vehicle will be driven. Road use expectations vary widely between occasional local driving and longer sustained trips. When there is any uncertainty about fit, wheel condition, or age-related deterioration, a qualified tire professional should inspect the assembly.

Yes, the 30X4.95 deserves extra attention when used on antique wheels because wheel condition can be just as important as tire condition. Older rims may have corrosion, wear at the bead seat, previous repairs, or dimensional changes that affect how securely the tire mounts and seals.

Careful inspection of the complete wheel-and-tire assembly is especially important before road use after long storage or restoration work. Confirm that the wheel is the correct 5-inch diameter for the tire and that the bead area is clean and structurally sound. Safe use depends on the whole assembly working together, not simply on the sidewall size matching the vehicle's era.