The 1926 Hupmobile Line 8 came from a period when American cars were rapidly becoming more refined, more powerful, and more capable of sustained road use. An Eight-cylinder Hupmobile carried a distinctly upscale presence for its time, so tire choice plays a real role in how the car looks, sits, and drives today. This model uses bias-ply fitments in 33X6.00 and 600-21, both tied to a 21-inch wheel setup. That gives owners a choice between antique-format sizing and a vintage numeric bias-ply size, with available blackwall and wide whitewall options in 600-21. The key is matching the car's actual wheel and fitment setup before selecting a restoration-oriented replacement.
Which Tire Size Is Right for The 1926 Hupmobile Line 8
The 1926 Hupmobile Line 8 uses two primary bias-ply tire sizes, and the first step is confirming which size is on the car now. Both fitments relate to a 21-inch wheel setup, but they use different sizing conventions, so the real decision is identifying the existing wheel and tire arrangement before choosing a period-style replacement.
33X6.00 is an antique diameter-by-section size, which means the first number refers to the tire's approximate overall diameter and the second refers to its section width in inches. For a 1926 Hupmobile Line 8, this is a traditional bias-ply fitment that reflects early sizing practice from the period. Its appeal is largely historical and visual, especially for owners trying to preserve an authentic pre-war tire presentation. Choosing this size starts with confirming that the car is actually set up for the 33-inch antique-format tire rather than the 600-21 numeric bias-ply alternative.
600-21 is a numeric bias-ply size in which the 600 indicates a nominal section width of about 6.00 inches and the 21 identifies the wheel diameter. On the 1926 Hupmobile Line 8, it is a period-appropriate bias-ply fitment with actual product choices available from Lester and BFGoodrich. Those options include blackwall and wide whitewall styles, along with tire series such as Lester Classic Bias Ply and Silvertown Classic Bias Ply. This size is the more product-supported path when the car already uses 21-inch wheels set up for 600-21 tires.
Sub-model fitment is straightforward here because the covered Hupmobile Line 8 Base can use the same two bias-ply tire sizes. The important step is not comparing trims, but confirming which of the two size formats is actually on the car before choosing a replacement.
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1926 Hupmobile Line 8 Base
The 1926 Hupmobile Line 8 Base uses the same pair of primary bias-ply fitments, 33X6.00 and 600-21. That means tire selection comes down to verifying the car's present wheel-and-tire setup, then choosing the right period-style replacement and sidewall treatment for the look you want.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 1926 Hupmobile Line 8 Tires for Sale
Available 600-21 tires give the 1926 Hupmobile Line 8 a useful mix of Lester and BFGoodrich choices, including Lester Classic Bias Ply and Silvertown Classic Bias Ply series. Buyers can compare blackwall and wide whitewall presentation, along with rim-width and load details where they apply.
These FAQs focus on the two bias-ply sizes used on the 1926 Hupmobile Line 8, how to confirm the right wheel setup, and how to choose between available period-style tire options for restoration and road use.
Tire Size & Fitment
What tire size fits a 1926 Hupmobile Line 8?
The 1926 Hupmobile Line 8 uses two primary bias-ply tire sizes: 33X6.00 and 600-21. Both are vintage fitments, but they belong to different sizing systems. 33X6.00 is an antique diameter-by-section size, while 600-21 is a numeric bias-ply size tied to a 21-inch rim.
The important next step is verifying which setup is actually on the car before replacing anything. A restored or long-owned Hupmobile may not still wear the same size format it used years ago, so checking the tire sidewall, wheel dimensions, and overall clearance is more useful than assuming either size applies automatically.
What size rim does a 1926 Hupmobile Line 8 use?
The 1926 Hupmobile Line 8 uses a 21-inch rim with its 600-21 tire fitment, and the vehicle's fitment range centers on a 21-inch wheel setup. The available 600-21 products also confirm that rim diameter. For 600-21, some products specify a rim width range of 3.00 to 3.75 inches.
Wheel diameter should always be confirmed on the actual car, especially on an older restoration or a car that may have had wheel changes over time. Measuring the wheel and checking the existing tire markings helps prevent ordering a correct-looking vintage tire in the wrong size format for the Hupmobile's present setup.
Does the 1926 Hupmobile Line 8 Base use the same tire size?
The 1926 Hupmobile Line 8 Base uses the same two primary tire sizes associated with this model: 33X6.00 and 600-21, both in bias-ply construction. There is no separate alternate size tied only to the Base within this fitment group. The tire decision is really about which of those two vintage size formats the car is using now.
That matters because antique-format and numeric bias-ply sizing are not just different labels for the same thing. Before selecting a tire, inspect the sidewall markings already on the car and confirm the wheel dimensions. That approach keeps the replacement focused on actual fitment rather than trim-name assumptions.
Choosing the Right Tire
What should I consider when choosing a 600-21 tire for a 1926 Hupmobile Line 8?
Start with the basics: correct 600-21 sizing, bias-ply construction, and compatibility with the car's 21-inch wheel. In this size, available choices include Lester and BFGoodrich products, with blackwall and wide whitewall sidewall styles. Some 600-21 options also include rim-width guidance and a stated maximum load of 1350@36 psi.
After sizing and wheel compatibility are confirmed, the decision usually becomes one of appearance and intended use. A blackwall gives a more restrained presentation, while a wide whitewall creates a stronger period visual statement. For a regularly driven collector car, comparing product details such as rim-width range and load information is also worthwhile.
What sidewall styles are available for 1926 Hupmobile Line 8 tires?
For the 1926 Hupmobile Line 8 in 600-21, available sidewall styles include blackwall and wide whitewall. Blackwall appears in both Lester and BFGoodrich offerings, while wide whitewall is available in a BFGoodrich 600-21 option. Those choices let the tire contribute differently to the car's finished look.
Sidewall style should be chosen as part of the overall restoration presentation, not as a stand-alone detail. A whitewall can give the car a more formal, dressed appearance, while blackwall keeps the look simpler and more understated. Matching the tire style to the wheel finish, trim level, and intended era presentation usually produces the best visual result.
What brands offer tires for the 1926 Hupmobile Line 8?
The available 600-21 tire choices for the 1926 Hupmobile Line 8 come from Lester and BFGoodrich. Those products appear in tire series such as Lester Classic Bias Ply and Silvertown Classic Bias Ply. All of them keep to the period-style bias-ply construction appropriate to this Hupmobile's vintage fitment.
Brand alone should not be the only deciding factor. It is more useful to compare the full combination of size, sidewall style, tire series, rim-width guidance, and load details where they are stated. That makes it easier to choose a tire that suits the car's appearance goals and the way it will actually be used.
Restoration & Appearance
Which tire should I choose for a period-style 1926 Hupmobile Line 8?
A period-style 1926 Hupmobile Line 8 should stay with one of its proper bias-ply fitments, either 33X6.00 or 600-21, depending on the wheel-and-tire setup on the car. That preserves the correct vintage sizing character better than moving outside the original fitment family. For 600-21, both Lester and BFGoodrich options are available.
Appearance matters as much as raw fitment on a car from this era. Once the correct size format is confirmed, sidewall style becomes the next major choice, especially between blackwall and wide whitewall in 600-21. Buyers pursuing strict historical accuracy should also compare their car against marque references and period photographs.
Does correct tire fitment matter for a 1926 Hupmobile Line 8 restoration?
Correct tire fitment matters a great deal on a 1926 Hupmobile Line 8 because tire size strongly affects stance, visual proportion, and overall period character. Using the proper bias-ply size family helps the car look settled and appropriate to its era. On a restoration, the tire is one of the most visible finishing details.
Fitment also affects practicality. A tire that suits the wheel diameter and width properly is easier to evaluate for clearance and road use than a mismatched substitute. Even when the goal is mainly appearance, checking the actual wheel dimensions and existing setup on the car keeps the restoration from drifting into avoidable fitment problems.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1926 Hupmobile Line 8?
Yes. Any change to wheel diameter, wheel width, suspension height, steering components, or body clearance can affect tire fitment on a 1926 Hupmobile Line 8. That matters even more on an early car, where tire sizes such as 33X6.00 and 600-21 already depend on vintage wheel standards and a very specific overall setup.
A modified Hupmobile should be checked carefully before replacement tires are chosen. Measure the wheel, inspect clearance at full steering lock, and look at the gap around fenders, suspension parts, and brake components. Small changes made years ago can alter what works on the car today, even when the tire size sounds historically appropriate.
What should I inspect before driving a 1926 Hupmobile Line 8 on new tires?
Before driving a 1926 Hupmobile Line 8 on new tires, inspect the wheels for condition, confirm the rim dimensions, and make sure the tires are mounted in the correct size and construction for the car's setup. It also makes sense to check valve stems, mounting hardware, and basic clearance around the suspension and body.
Once mounted, look at inflation, tread seating, and any sign of rubbing during slow steering movement. A short initial drive should be followed by another inspection for air loss, sidewall scuffing, or contact marks. Collector cars that have been stored for long periods benefit from especially careful checks before returning to normal road use.
How should 600-21 tires on a collector 1926 Hupmobile Line 8 be maintained?
600-21 tires on a collector 1926 Hupmobile Line 8 should be kept properly inflated, inspected regularly for cracking, cuts, bulges, or uneven wear, and protected from long exposure to heat, sunlight, and ozone sources. Even on a low-mileage car, age and storage conditions matter just as much as tread depth.
Routine inspection is especially important before tours, parades, or longer seasonal drives. Check for slow air loss, confirm that the wheel hardware remains secure, and make sure the tire still clears the car cleanly under steering movement. Good storage habits and frequent visual checks help preserve both appearance and roadworthiness.
