1927 Vehicle Tire Fitment Guide

This bias-ply size is shared across 1927 Buick 115 Standard, Chandler Special, Dodge 4 Cyl., Gardner 6B, Paige 65 Series, and Studebaker Standard models. That broad use makes 31X5.25 one of the better examples of how several different makes converged on similar late-1920s fitment needs. In practical terms, it sits above smaller four-cylinder sizes yet below the 6.00, 6.50, and 7.00-series applications used on larger cars. Owners should treat it as a companion to 525-21, since the rim-based size is typically more useful when evaluating product selection and wheel compatibility.

Rim Diameter: 21 in  ·  Sidewalls: Wide Whitewall, Blackwall

The 525-21 tire size supports 1927 Buick 115 Standard, Chandler Special, Dodge 4 Cyl., Gardner 6B, Paige 65 Series, and Studebaker Standard applications. Available products include Firestone blackwall and wide whitewall versions plus an Excelsior Comp H blackwall, all in bias-ply construction. Firestone listings specify a 21-inch rim diameter, a 2.50 to 3.00 inch rim-width range, and a stated maximum load capacity of 1120 pounds at 36 psi. That mix gives shoppers both styling and brand choices, but wheel width and intended vehicle use still matter when narrowing the best option for a particular 1927 car.

33X6.00 is a larger 1927 bias-ply fitment used on Buick 120 Master, Buick 128 Master, Chandler Big, Kissel 55, Kissel 75, Peerless 72 Series, and Rickenbacker 90 Series. This size places those vehicles among the more substantial passenger cars of the year, with a taller, wider tire than many mid-range models. It is paired with the rim-based 600-21 designation, which is the more direct path to current product selection. For collectors researching stance and visual proportion, this size tends to deliver the fuller, larger-tire appearance expected on higher-end late-1920s cars.

Rim Diameter: 21 in  ·  Sidewalls: Blackwall, Wide Whitewall

The 600-21 size covers a range of larger 1927 cars including Buick 120 Master, Buick 128 Master, Chandler Big, Kissel 55, Kissel 75, Peerless 72 Series, and Rickenbacker 90 Series. Available bias-ply products include Lester blackwall and BFGoodrich Silvertown Classic Bias Ply options in both blackwall and wide whitewall form. BFGoodrich lists a 21-inch rim diameter, a 3.00 to 3.75 inch rim-width range, and a maximum load capacity of 1350 pounds at 36 psi. This combination of size, sidewall choice, and brand variety makes 600-21 one of the stronger restoration-oriented selections within 1927 fitment coverage.

The 33X7.00 size is associated specifically with the 1927 Cadillac 8 Cyl., placing it at the large end of passenger-car fitment for the year. As a bias-ply designation in overall-dimension form, it reflects the substantial tire needs of a premium eight-cylinder automobile from the late 1920s. This is not a shared mid-market size, and that limited application makes careful identification especially important. When researching replacements, the paired 700-21 size is the key cross-reference, since it connects the Cadillac fitment to available products and confirms the 21-inch rim diameter used in current listings.

Rim Diameter: 21 in  ·  Sidewalls: Blackwall, Wide Whitewall, Double-Whitewall

The 700-21 size covers several large 1927 luxury and prestige automobiles, including Cadillac 8 Cyl., Cunningham 8, Lincoln 8 Cyl., Locomobile 48, Locomobile 90, Peerless 69 Series, Pierce Arrow 36 Series, Pierce Arrow 80 Series, and Stearns-Knight D6-85. Product choices are extensive for this year, with Firestone Balloon blackwall, wide whitewall, and double-whitewall options plus a Michelin Double Rivet blackwall. Listed specifications include a 21-inch rim diameter, rim-width ranges up to 4.00 inches on some versions, and Firestone load ratings up to 1930 pounds at 40 psi, making this a notably robust 1927 fitment category.

32X6.50 is used on the 1927 Case JIC and represents a relatively specialized bias-ply fitment within the year. It sits among the heavier late-1920s tire sizes, and its role is best understood through its relationship to the rim-based 650-20 designation. Because this application is limited to one model here, accurate vehicle identification matters more than broad year-level assumptions. Owners of a 1927 Case JIC should use the paired size references together and pay close attention to wheel dimensions and the vehicle's current configuration before selecting a replacement tire.

Rim Diameter: 20 in  ·  Sidewalls: Wide Whitewall, Blackwall

The 650-20 size serves a wide mix of 1927 vehicles including Case JIC, DuPont E, Elcar 90 Series, Flint E80 Series, Jordan Gt Line-8, Paige 85 Series, Roamer 88 Series, Stutz 8 Cyl., and both Wills, Sainte Claire six- and eight-cylinder models. Available bias-ply choices include Firestone blackwall and wide whitewall passenger-car tires, plus Denman and Deka blackwall products in classic truck-oriented series. Firestone lists a 20-inch rim diameter, a broad 3.00 to 5.00 inch rim-width range, and a 2120-pound maximum load capacity at 60 psi, so this size spans both restoration appearance and heavier-duty usage considerations.

This bias-ply size appears on 1927 Chandler Standard, Davis 94 Series, Falcon 6 Cyl., and Velie 50 Series models. It represents a moderate late-1920s fitment that falls between the smallest 4.40 applications and the larger 5.25 and 6.00 sizes used on heavier cars. For identification purposes, 29X4.95 should be considered together with 5.00-20, since the two conventions are paired on the same vehicles. That distinction is useful when matching surviving wheels and when deciding whether a given tire choice preserves the intended proportions of a standard-class 1927 automobile.

The 5.00-20 designation fits 1927 Chandler Standard, Davis 94 Series, Falcon 6 Cyl., and Velie 50 Series applications. As a bias-ply rim-based size, it is often the clearer reference for wheel matching because it directly identifies a 20-inch rim. This size occupies a practical middle-lower range in 1927 fitment, larger than compact 4.40 tires but below the broader 5.25 and 6.00 groupings found on heavier cars. Even within this shared size, owners should still verify wheel condition, bead seating surfaces, and any later modifications that might affect overall clearance or appearance.

29X4.40 is associated with the 1927 Chevrolet 4 Cyl. and 1927 Ford T Series, making it one of the more familiar small-car tire sizes of the year. This bias-ply fitment reflects the compact end of the 1927 market and helps explain why those vehicles present a different tire profile and stance from larger six- and eight-cylinder cars. It is paired with the more direct 4.40-21 size reference for replacement research. For owners of a Chevrolet 4 Cyl. or Ford T Series, this is a size where preserving the correct proportions can be just as important as simply finding a tire that mounts.

The 4.40-21 size fits the 1927 Chevrolet 4 Cyl., 1927 Ford T Series, and 1927 Star 4 Cyl. and represents one of the smaller 21-inch fitments used that year. All listed applications are bias-ply, appropriate to the period and to the narrow, tall tire profile seen on many lower-displacement late-1920s vehicles. Although no specific products are shown here for this size, it remains a key fitment reference because it connects compact four-cylinder models across several makes. Since wheel diameter is explicit in the size, confirming that 21-inch wheel is the first practical step in the selection process.

This bias-ply size is used on the 1927 Chrysler 50 Series, Moon 60 Series, and Pontiac 6 Cyl. It occupies a useful middle-lower position in the 1927 range, larger than 4.40 applications but not as substantial as 5.25 or 6.00 sizes. Vehicles in this group often share the same general tire proportions while differing in chassis design, wheel condition, and restoration details, so size alone should not be treated as a guaranteed fit. The paired 4.75-20 designation is the better cross-reference for current wheel and product matching.

The 4.75-20 size fits 1927 Chrysler 50 Series, Moon 60 Series, Pontiac 6 Cyl., and Whippet 93A applications. This bias-ply size represents a 20-inch wheel fitment and sits squarely in the transitional passenger-car range between the smallest four-cylinder tires and the larger premium-car sizes. Its shared use across several makes shows how common certain dimensions became by the late 1920s, even when the cars themselves were quite different in price and engineering. For accurate selection, owners should still verify that a surviving Whippet, Chrysler, Moon, or Pontiac retains the correct wheel and body clearance for this sizing.

28X5.25 is used on the 1927 Chrysler 60 Series and 1927 Elcar 70 Series. As a bias-ply overall-dimension designation, it reflects another example of the paired sizing language common in 1927. Compared with 29X5.25 and 31X5.25 applications, this size suggests a slightly shorter overall tire while keeping a similar general width class. That can matter when owners are trying to preserve period stance and gearing feel. The companion 5.25-18 size should be used alongside this designation when evaluating wheel fitment, because it directly points to the required 18-inch rim.

The 5.25-18 size supports the 1927 Chrysler 60 Series and 1927 Elcar 70 Series. This bias-ply rim-based size confirms an 18-inch wheel and gives restorers a clearer fitment reference than the paired 28X5.25 marking alone. Within the 1927 tire landscape, it falls into a moderate-width group that can suit mid-range late-1920s cars without the bulk of 6.00 and 7.00-series applications. Even though this size is limited to two makes here, owners should still inspect wheel width, rim condition, and any suspension or brake changes that may affect practical tire selection.

30X6.75 is a single-application bias-ply size used on the 1927 Chrysler 80 Series. That limited use makes it one of the more specialized 1927 fitments, tied to a larger and more substantial Chrysler than the 50, 60, or 70 Series cars. Its proportions place it in the upper end of the year's passenger-car range, where appearance, load support, and wheel compatibility all become more critical. The paired 700-18 designation is especially important for product selection because it ties the fitment to available 18-inch tire offerings and related specifications.

Rim Diameter: 18 in  ·  Sidewalls: Double-Whitewall, Blackwall, Wide Whitewall

The 700-18 size is associated specifically with the 1927 Chrysler 80 Series and has a comparatively rich product selection. Available bias-ply options include Firestone Balloon blackwall, wide whitewall, and double-whitewall versions, along with a Firestone Classic Bias Ply blackwall. Listed specifications include an 18-inch rim diameter, a 3.75 to 4.00 inch rim-width range, and Firestone load capacity figures of 1520 pounds at 36 psi. For owners of a Chrysler 80 Series, this size offers meaningful style and series choices while still preserving the tall, substantial late-1920s tire profile expected on an upper-line car.

33X6.75 is used across an important group of high-end 1927 automobiles, including Cunningham 8, Lincoln 8 Cyl., Locomobile 48, Locomobile 90, Peerless 69 Series, Pierce Arrow 36 Series, Pierce Arrow 80 Series, and Stearns-Knight D6-85. This bias-ply fitment belongs near the top of the passenger-car size range for the year and contributes strongly to the imposing stance of these large luxury machines. It pairs with 700-21 for product selection, and buyers should approach it with care because wheel width, vehicle weight, and restoration goals matter more here than on more common mid-size applications.

The 30X5.77 size is one of the broadest shared 1927 fitments, spanning many makes from Davis and Flint to Franklin, Paige, Peerless, Rickenbacker, Roamer, Studebaker, Velie, and Willys-Knight. That wide usage makes it a central size when researching late-1920s replacement tires. As a bias-ply overall-dimension designation, it reflects period nomenclature that often appears alongside the simpler 30x5 listing. Because it served such a varied group of vehicles, this size should not be treated as interchangeable without checking the exact model, wheel, and intended use of the individual car.

The 30x5 size appears across a large group of 1927 vehicles including Flint B60 Series, Franklin 11B, Gardner 90 Series, Hupmobile E, Locomobile 66, Paige 75 Series, Peerless 80 Series and 90 Series, Rickenbacker 70 Series and 80 Series, Roamer 80 Series, Studebaker Special, Velie 60 Series, and Willys-Knight 66 Series and 70 Series. All are bias-ply applications. This size functions as an important shared late-1920s fitment category, but because no product details are listed here, careful wheel and vehicle verification is especially important before moving from size research to a final tire choice.

32X6.20 is fitted to 1927 DuPont E, Flint E80 Series, Jordan Gt Line-8, Paige 85 Series, Roamer 88 Series, Stutz 8 Cyl., and both Wills, Sainte Claire six- and eight-cylinder models. This bias-ply size serves upper-range cars that demand a heavier, broader tire than ordinary 5.25 and 6.00 applications. It corresponds with the more selection-friendly 650-20 designation, which is where current product choices are concentrated. For restoration-minded buyers, this size often sits at the intersection of visual presence and substantial load needs, making wheel width and sidewall style especially relevant.

The 31X6.75 size is associated specifically with the 1927 Duesenberg 8 Cyl., giving it a highly specialized place in the year's fitment landscape. This bias-ply tire size belongs to a large, premium-class automobile and should be treated as a precise application rather than a broadly shared 1927 size. Its paired 700-19 reference is the more direct path to current product options and wheel information. Because surviving Duesenberg restorations can vary in wheel equipment and restoration philosophy, confirming exact wheel dimensions and intended appearance is especially important before selecting a replacement tire.

Rim Diameter: 19 in  ·  Sidewalls: Blackwall, Double-Whitewall, Wide Whitewall

Used on the 1927 Duesenberg 8 Cyl., the 700-19 size has several bias-ply product choices, including Firestone Balloon, Firestone Classic Bias Ply, and Lester blackwalls, plus a Firestone Balloon double-whitewall. Listed versions use a 19-inch rim diameter, and Firestone gives load capacities around 1570 to 1585 pounds at 36 psi depending on the product. This is a substantial premium-car size that balances large visual scale with meaningful product variety. For a Duesenberg owner, the choice between Balloon and Classic Bias Ply series can affect both appearance and period character, even before sidewall style is considered.

28X4.40 is a bias-ply size used on the 1927 Erskine 50 Series. It belongs to the smaller end of the 1927 fitment spectrum and is paired with the more wheel-specific 4.40-20 designation. Compared with the many larger six- and eight-cylinder applications from the same year, this size reflects a lighter and more compact vehicle class. Because the fitment is limited to a single model here, buyers should make identification part of the selection process rather than relying on year alone. Preserving proper proportions is particularly important with narrower late-1920s tires such as this one.

The 4.40-20 tire size is associated with the 1927 Erskine 50 Series and confirms a 20-inch wheel fitment in bias-ply construction. It is one of the narrower and less widely shared 1927 sizes, so it should be approached as a model-specific application rather than a general small-car standard. Although no product listings are shown here for 4.40-20, the designation remains valuable because it gives a direct wheel reference and helps distinguish the Erskine from 4.40-21 applications used on other cars. As always with antique wheels, condition and correct dimensions deserve careful attention before installation.

30X4.95 appears on the 1927 Essex 6 Cyl. and represents a single-model bias-ply fitment. Within the 1927 range, it falls below the larger 5.25 and 6.00 sizes but above the smallest 4.40 applications, making it a useful example of how fitment varied by make and model even among mainstream cars. The size is paired with 5.00-21, which is generally the more practical designation for wheel matching and product research. For an Essex owner, that pairing is important because it helps translate period tire markings into a modern replacement search.

The 5.00-21 size fits the 1927 Essex 6 Cyl. and identifies a bias-ply tire for a 21-inch wheel. It is a relatively focused fitment compared with more widely shared 1927 sizes such as 525-21 or 600-21, so exact model identification matters. This size gives the Essex a taller wheel package than some 20-inch applications of similar width class, which can influence both appearance and ride character on a restored car. Even without listed products here, the 5.00-21 marking provides an essential fitment checkpoint when confirming wheel diameter and selecting a suitable period-style tire.

30X5.25 is shared by 1927 Flint Jr, Gardner 5B Cab, Hupmobile A, Moon A, Oakland 6 Cyl., Oldsmobile 6 Cyl., and Paige 45 Series models. This bias-ply size is one of the more broadly useful mid-range 1927 fitments, bridging ordinary passenger-car applications without moving into the heavier 6.00 and 6.50 classes. It is paired with the 5.25-20 designation, which should be used when checking wheel diameter and product compatibility. Because this size appears on several different makes, it is a good reminder that identical tire dimensions do not eliminate the need to verify the exact vehicle configuration.

The 5.25-20 size fits 1927 Flint Jr, Gardner 5B Cab, Hupmobile A, Moon A, Oakland 6 Cyl., Oldsmobile 6 Cyl., and Paige 45 Series applications. As a bias-ply size tied to a 20-inch rim, it offers a practical fitment reference for a broad slice of mid-range 1927 vehicles. Its place in the lineup is larger than 5.00-20 but still more moderate than 600-21 or 650-20 applications found on heavier cars. No products are listed here for this size, so wheel confirmation, bead-seat condition, and overall vehicle setup become especially important before moving ahead with a purchase decision.

32X6.75 is used on the 1927 Marmon 75 Series, Stearns-Knight Gt. 8, and Studebaker Big 6 Cyl. These are larger, more substantial automobiles, and this bias-ply size reflects that with a tire footprint and visual scale beyond ordinary mid-range applications. The fitment pairs with 700-20, which is the more direct route to current product options. Because this size sits in the upper luxury and big-car range, details such as wheel width, body clearance, and sidewall appearance can have a noticeable effect on both drivability and the restored look of the vehicle.

Rim Diameter: 20 in  ·  Sidewalls: Double-Whitewall, Wide Whitewall, Blackwall

The 700-20 size supports 1927 Marmon 75 Series, Stearns-Knight Gt. 8, and Studebaker Big 6 Cyl. applications and offers a strong range of bias-ply choices. Available products include Firestone Balloon blackwall, wide whitewall, and double-whitewall versions, along with BFGoodrich Silvertown Classic Bias Ply blackwall and wide whitewall options. Listed rim diameters are 20 inches, with rim-width ranges varying by product from 3.75 to 4.00 inches on some Firestone offerings to 5.00 to 5.50 inches on BFGoodrich versions. That variation makes wheel measurement especially important before selecting among available 700-20 tires.

30X6.20 is a single-application size used on the 1927 Reo Flying Cloud. This bias-ply fitment places the Reo in a larger and more substantial class than many mid-range 1927 cars, while still differing from the 700-series tires found on some premium luxury automobiles. The companion size 650-18 is especially helpful because it provides a direct rim-diameter reference for replacement research. Since the Reo Flying Cloud stands alone here with this overall-dimension marking, careful wheel verification and attention to the vehicle's present-day setup are essential when moving from size identification to product selection.

Rim Diameter: 18 in  ·  Sidewalls: Wide Whitewall, Blackwall

The 650-18 size is associated with the 1927 Reo Flying Cloud and has available Firestone Balloon bias-ply products in blackwall and wide whitewall forms. Listed specifications include an 18-inch rim diameter, a 3.25 to 3.50 inch rim-width range, and a stated maximum load capacity of 1205 pounds at 36 psi for the blackwall version. This size offers a useful blend of substantial late-1920s proportions and clear product details. For a Reo Flying Cloud owner, it is worth considering both wheel width and desired sidewall appearance, since those factors can materially change the final look of the car.

29X4.50 is fitted specifically to the 1927 Star 4 Cyl. and stands as a smaller, lighter-duty bias-ply application within the year's fitment spectrum. It differs from the related but not identical 29X4.40 size used elsewhere and should not be treated as interchangeable without confirmation. This size helps illustrate how even modest four-cylinder cars from 1927 could carry distinct tire dimensions depending on make and model. Because no product details are shown for 29X4.50, owners should verify the wheel and any existing tire markings carefully before selecting a replacement intended to preserve the car's correct proportions.

The 30X4.75 size appears on the 1927 Star 6 Cyl. and represents a bias-ply fitment that steps up from the smaller Star 4 Cyl. tire sizing. It belongs to the middle-lower end of the 1927 range, combining a relatively modest width with a taller overall dimension than the smallest entry-level applications. The paired 4.75-21 designation is more useful for confirming wheel diameter and narrowing tire options. For a Star 6 Cyl. restoration, this size can have a noticeable influence on ride height and visual balance, so matching the proper specification matters beyond simple installation.

The 4.75-21 size is associated with the 1927 Star 6 Cyl. and identifies a bias-ply tire for a 21-inch wheel. This makes it distinct from 4.75-20 applications used on several other 1927 cars, even though the section width designation appears similar at first glance. That one-inch difference in wheel diameter is a key fitment detail and should never be overlooked during a restoration or replacement search. While no product listings are shown here, the size remains an important guidepost for maintaining proper tire height, wheel compatibility, and the visual stance intended for the Star 6 Cyl.

29X4.76 is used on the 1927 Whippet 93A and is one of the more unusual single-model bias-ply sizes in the 1927 lineup. Its closeness to more common 4.75-family sizing can make identification tricky, which is why the companion 4.75-20 fitment reference deserves attention. This is a good example of why antique tire replacement should start with the exact markings associated with the specific vehicle rather than broad assumptions based on make or engine count. For Whippet 93A owners, careful wheel confirmation helps avoid confusion with similar but not necessarily identical late-1920s sizes.

The 27X4.40 size is fitted specifically to the 1927 Whippet 96 Series and sits near the smaller end of the 1927 fitment range. As a bias-ply overall-dimension designation, it differs from the more common 29X4.40 applications seen elsewhere and should not be treated as the same size. This kind of difference can meaningfully affect tire height, stance, and clearance on a compact late-1920s car. The paired 4.40-19 designation is the more practical wheel-based reference when researching replacements, especially for owners trying to balance accurate appearance with proper wheel compatibility.

The 4.40-19 size is associated with the 1927 Whippet 96 Series and confirms a 19-inch wheel in bias-ply construction. Compared with 4.40-20 and 4.40-21 applications from the same era, this size highlights how similar section-width markings can still belong to very different wheel packages. For compact 1927 cars, that distinction affects both installation and the finished look of the vehicle. No product listings are shown here, so an owner should confirm the wheel diameter directly, inspect the rim carefully, and compare existing tire markings before choosing a replacement intended for the Whippet 96 Series.