The 29X4.76 tire is a bias-ply flotation size associated with early light truck, off-road, and specialty applications, and it also suits certain antique-era vehicles that used tall, narrow proportions. Its 29-inch overall height and slim section give it the upright look and road feel buyers expect when preserving an older wheel-and-tire stance. Bias-ply construction is often the right direction when maintaining factory-style character on an antique or classic build rather than chasing modern replacement proportions. Before choosing the size, confirm wheel diameter, wheel width compatibility, load needs, and clearance around fenders, steering components, and suspension travel.
The 29X4.76 measures 29.0 inches in overall diameter, 4.7 inches in section width, and is built to fit a 6.0-inch rim diameter.
Overall Diameter: 29.0 in (736.6 mm) — This determines ride height, wheel-opening fill, and speedometer accuracy — and is the first number to compare when evaluating any substitute size.
Section Width: 4.7 in (119.4 mm) — This is the dimension to check first against fender lips, suspension components, and brake clearance.
Rim Diameter: 6.0 in (152.4 mm) — This must match exactly — 29X4.76 cannot be mounted on any other rim diameter regardless of how other dimensions compare.
Circumference: 91.11 in (2314.2 mm) — Use this to compare how a substitute size will affect speedometer calibration.
Revolutions Per Mile: 695.4 — A meaningfully different value from a substitute size will alter speedometer and odometer readings.
Construction: Bias Ply — Construction type affects ride feel, sidewall flex, handling behavior, and period-correctness for restoration.
Vehicles That Use 29X4.76
The 29X4.76 appears in vehicle usage spanning 1926 through 1930, including Whippet applications such as the 1927 Whippet 93A. That makes it a size with clear antique-era relevance even though the flotation format also appears in specialty and off-road contexts. Use the vehicle list as a starting point, then confirm wheel diameter, wheel condition, and physical clearance before treating the size as a working replacement.
Find answers to the most common questions about 29X4.76 tire sizing, fitment, compatibility, performance, maintenance, and replacement options.
Size Basics & Dimensions
What does 29X4.76 mean?
The 29X4.76 size identifies a flotation-style tire by its outside dimensions rather than by a modern metric formula. In this code, 29 refers to an approximate overall tire diameter of 29.0 inches, and 4.76 refers to an approximate section width of about 4.7 inches. The wheel diameter for this size is 6.0 inches.
Unlike a modern P-metric size, the 29X4.76 does not directly spell out an aspect ratio or use millimeters for width. Buyers usually read this format for its stance value first, because overall height and width are the key clues to how the tire will fill the wheel opening, affect gearing feel, and preserve the look of an older light truck, off-road, or antique application.
What size wheel does the 29X4.76 tire fit?
The 29X4.76 tire fits a 6.0-inch wheel diameter, which equals 152.4 millimeters. On flotation sizes like this, the leading number in the code is the tire's outside diameter, not the wheel size, so the wheel itself is much smaller than the full mounted height of the tire.
That distinction matters because a 29-inch outside diameter can be mistaken for a 29-inch wheel by buyers who are more familiar with bicycle or specialty wheel measurements. Wheel width also matters to proper fit, but that needs to be confirmed against the actual tire and wheel being used. Matching the 6-inch rim diameter exactly is non-negotiable, while width and clearance still need to be checked on the vehicle.
How wide is the 29X4.76 tire?
The 29X4.76 tire is about 4.7 inches wide in section width, which is approximately 119.4 millimeters. Section width is measured at the widest point of the inflated sidewall, not across the tread face that actually contacts the road.
Clearance work starts with section width because sidewall bulge is what comes closest to suspension arms, inner fenders, steering parts, and brake hardware. Tread width is usually narrower, so using tread measurements alone can mislead buyers. On an older application with limited fender space, the section width is the more important number for deciding whether the tire preserves the intended stance without creating rub issues.
What is the outside diameter of the 29X4.76 tire?
The 29X4.76 has an overall diameter of 29.0 inches, or about 736.6 millimeters. That number describes the full mounted height of the tire from the ground to the top of the tread, measured straight through the center.
Overall diameter influences more than appearance. It affects ride height, wheel-opening fill, effective gearing, and speedometer behavior if you are comparing this size with another option. On antique and specialty builds, diameter also plays a major role in preserving the visual proportions of the vehicle. A tire that is noticeably shorter or taller can change the whole look, even if the rim diameter stays the same.
What size wheel does the 29X4.76 tire actually fit?
The 29X4.76 actually fits a 6.0-inch wheel diameter, not a 29-inch wheel. The 29 in the size code refers to the tire's outside diameter, while the rim diameter is the separate wheel measurement that must match the tire bead exactly.
Flotation-style sizing can confuse buyers because the most prominent number is the tire height, not the wheel diameter. When replacing an older tire, confirm both the wheel diameter and the tire's full outside height before ordering a substitute. Keeping those numbers straight helps avoid buying a tire that has the right stance on paper but cannot physically mount to the existing wheel.
How many revolutions per mile does the 29X4.76 tire turn?
The 29X4.76 turns about 695.4 revolutions per mile. That figure is based on the tire's approximate 29.0-inch overall diameter and 91.11-inch circumference, and it gives a practical way to compare rolling size against another tire.
Revolutions per mile matter when buyers are weighing substitutes or trying to keep a vintage vehicle's gearing feel close to original. A tire that turns more times per mile is effectively smaller, while one that turns fewer times is effectively taller. Even when two tires look close in photos, this number can reveal whether a change will alter speedometer readings or highway engine speed.
Tire Compatibility & Fitment
Is the 29X4.76 the right fit for an original-style antique application?
The 29X4.76 can be appropriate for original-style antique applications when the vehicle was built around a tall, narrow bias-ply flotation tire on a 6-inch rim diameter. Its proportions and construction align well with the kind of upright stance and traditional sidewall behavior many antique restorations are trying to preserve.
Original fitment still needs to be confirmed against the vehicle's own documentation, wheel dimensions, and physical clearances. Antique vehicles often have been updated over the years with different wheels, brakes, or suspension parts, and those changes can affect fit even when the size code looks familiar. Treat the size as a strong starting point, then verify how the actual wheel-and-tire package sits on the car or truck.
What fitment checks matter most before using the 29X4.76 tire?
The main checks for the 29X4.76 are wheel diameter, section width, overall diameter, and vehicle clearance through full steering and suspension travel. The tire is built for a 6.0-inch rim diameter, measures about 4.7 inches in section width, and stands about 29.0 inches tall.
Those dimensions affect more than whether the tire mounts. They influence how close the sidewall comes to steering arms, springs, brake parts, and fender edges, especially on narrow early chassis. Buyers should also look at axle loading and intended road use, because an older-size tire that physically fits still has to suit the vehicle's weight and the way it will actually be driven.
Can the 29X4.76 replace another old flotation size with similar numbers?
The 29X4.76 may replace another flotation-style size only if the wheel diameter, overall height, width, and clearance all stay compatible with the vehicle. Similar-looking older size codes are not automatically interchangeable, because a small change in height or width can alter stance, fender clearance, and steering clearance.
Comparison should start with the full package, not just one number in the code. On antique and specialty applications, even a modest diameter difference can change how the vehicle sits, while a width difference can create rub where none existed before. Compare the mounted dimensions, inspect the wheel itself, and confirm that the replacement still matches the intended look and function of the vehicle.
Performance & Driving Experience
How does the 29X4.76 bias-ply tire drive compared with a modern radial?
The 29X4.76 uses bias-ply construction, so its road feel is typically different from a modern radial of similar height. Buyers can expect more traditional sidewall behavior, a period-style response to road grooves, and a driving character that matches older suspension design better than a modern radial feel would.
Steering response, straight-line tracking, and ride behavior depend heavily on alignment, chassis condition, load, and tire age as well as construction type. An antique vehicle with worn steering parts can feel very different from a properly sorted one on the same tire size. For many restorers, the tradeoff is intentional: preserving authentic feel and appearance matters more than imitating modern passenger-car manners.
What does the 29X4.76 size do to ride height and stance?
At 29.0 inches tall and roughly 4.7 inches wide, the 29X4.76 creates a tall, narrow stance that is visually different from most modern replacement sizes. That profile tends to preserve the upright, lightly filled wheel opening look associated with older light truck, off-road, and antique vehicle applications.
Ride height and stance are part of why buyers seek this size instead of converting to a more modern format. A change in overall diameter will alter how the vehicle sits and can affect gearing feel, while a wider substitute may change the visual balance at the fender. On early vehicles, getting the proportions right is often just as important as making the tire physically fit.
Is the 29X4.76 suitable for regular road use?
The 29X4.76 can be used on the road when the tire is in sound condition, correctly matched to the wheel, and appropriate for the vehicle's load and intended use. Bias-ply construction, however, should be chosen with realistic expectations about steering feel, braking behavior, and the way older-size tires respond to modern pavement.
Road manners are influenced by more than the size itself. Suspension wear, alignment settings, brake condition, speed, and long periods of storage can all shape how an older vehicle behaves once back in service. Before longer drives, inspect the tire carefully for age-related cracking, air loss, and damage, and keep the entire wheel-and-tire system consistent with the vehicle's actual use.
Tire Brands & Quality
What should buyers look for in a quality 29X4.76 tire?
A good 29X4.76 tire starts with accurate sizing, sound bias-ply construction, and dimensions that preserve the intended height and width of the original-style application. Buyers should focus on whether the tire maintains the narrow flotation profile they need, mounts to the correct 6-inch rim diameter, and suits the vehicle's load demands.
Quality also shows up in consistency across a full set. Antique and specialty vehicles respond better when all four tires share the same construction type, size format, and general age range, rather than mixing different designs side to side or axle to axle. For a restoration-minded owner, the best choice is usually the one that balances dependable build quality with the correct visual proportions.
Should the 29X4.76 be chosen for authenticity or for easier modern driving?
The 29X4.76 leans strongly toward authenticity because its bias-ply construction and flotation-style proportions support the look and feel expected on antique vehicles and older specialty applications. Buyers who want to preserve original stance and traditional driving character often prefer this route over adapting a more modern tire code.
Modern drivability goals can point a buyer in a different direction, but the decision should start with how the vehicle is used. A judged restoration, parade vehicle, or historically accurate build usually values correct proportions first. A more frequently driven vehicle may call for broader fitment research so the owner understands what changes in steering feel, clearance, and appearance come with any substitute approach.
Why does matched-set consistency matter with the 29X4.76?
Matched-set consistency matters with the 29X4.76 because antique vehicles are especially sensitive to differences in tire height, construction, and carcass behavior. Even when two tires share a similar size code, differences in actual diameter or build can affect how the vehicle sits, tracks, and responds to road inputs.
Keeping the same size and construction across the set also helps preserve visual balance. A narrow flotation tire that is slightly taller or shorter at one axle can make an older vehicle look uneven and may alter speedometer behavior or steering feel. Buyers replacing only one or two tires should compare dimensions carefully so the final set works together rather than just fitting individually.
Maintenance & Longevity
How should the 29X4.76 tire be stored on an antique vehicle?
The 29X4.76 should be stored away from heat, direct sunlight, moisture, and ozone sources such as electric motors or welders when the vehicle sits for long periods. Bias-ply tires on lightly used antique vehicles can age out long before tread is worn, so storage conditions matter as much as mileage.
Collector owners should also inspect for flat spotting, sidewall cracking, and air loss before putting the vehicle back on the road after storage. If the car or truck will remain parked seasonally, moving it occasionally or reducing long-term static load can help. Time, environment, and inactivity all affect service life, even when the tread still looks deep.
How often should the 29X4.76 be inspected?
The 29X4.76 should be inspected regularly for cracking, cuts, bulges, tread separation, and slow air loss, especially before any longer drive. Bias-ply tires on antique or specialty vehicles often see irregular use, which makes visual inspection especially important because age and storage can become bigger issues than wear.
Inspection should include the wheel itself, the valve area, and the space around the tire where rubbing might occur during steering or suspension movement. Owners should also pay attention to changes in ride feel, pull, or vibration, since those can signal tire or chassis issues. A careful pre-drive check is one of the simplest ways to catch problems before they become roadside failures.
How long can the 29X4.76 last if it still has good tread?
The 29X4.76 can still require replacement even when tread depth looks usable, because tire service life is affected by age, storage history, heat exposure, ozone, and overall condition as much as by mileage. Older bias-ply tires often spend years on vehicles that are driven only occasionally, which can hide age-related decline.
Tread alone is not the full story on an antique tire. Sidewall cracking, hardening rubber, repeated air loss, impact damage, or any sign of structural change should be taken seriously. Buyers and owners should review the tire's age and inspect it closely before regular road use, especially if the vehicle has been dormant or stored indoors for long stretches between drives.
Safety & Regulations
When should the 29X4.76 tire be replaced for safety?
The 29X4.76 should be replaced when it shows cracking, bulges, cuts, tread separation, repeated air loss, or other signs of age-related deterioration, even if the tread is not worn out. On antique and specialty vehicles, time and storage history often become the deciding factors sooner than mileage does.
Replacement timing should be based on condition, age, and intended use rather than appearance alone. A tire that looks acceptable in the garage may behave very differently under heat, speed, or sustained road use. Before tours, events, or highway travel, inspect each tire closely and have a qualified tire professional evaluate anything that looks questionable.
What should buyers verify before driving on the 29X4.76 on modern roads?
Buyers should verify the tire's overall condition, exact 6.0-inch wheel diameter match, vehicle load needs, and physical clearance before using the 29X4.76 on modern roads. Because it is a bias-ply size with antique and specialty relevance, road behavior may differ noticeably from what drivers expect from a modern radial passenger tire.
Modern-road readiness also depends on the rest of the vehicle. Steering play, brake performance, wheel condition, alignment, and suspension wear all influence how an older vehicle handles once speed increases. Checking the complete wheel-and-tire system before use helps reduce surprises and gives the driver a more realistic sense of how the vehicle will behave in today's traffic conditions.
Are there legal or regulatory concerns with the 29X4.76 tire?
The 29X4.76 should be evaluated against current local requirements, visible sidewall markings, and the intended use of the vehicle before road operation. Tire laws and inspection standards can vary by state and by how the vehicle is registered, so buyers should not assume that an older specialty size is treated the same way in every jurisdiction.
Regulatory questions also overlap with practical safety checks. Confirm that the tire matches the wheel correctly, inspect its condition, and review whether the vehicle's use will involve longer highway distances or only occasional local driving. When there is any doubt about markings, age, load suitability, or wheel compatibility, a qualified tire professional should review the setup before the vehicle returns to service.