1927 Buick 120 Master Tires

The 1927 Buick 120 Master uses two primary bias-ply tire sizes: 33X6.00 and 600-21. Both sizes are associated with this exact model, and both relate to the car’s early tire-sizing conventions rather than modern metric sizing. The covered sub-model, the 1927 Buick 120 Master 6 Cyl., uses the same pair of sizes.

The practical next step is to inspect the tires and wheels already on the car before choosing between them. Restored collector vehicles sometimes carry replacement wheels or long-ago tire substitutions, so matching the new tire to the actual wheel setup is more important than assuming one size is already in place.

The 1927 Buick 120 Master uses a 21-inch rim diameter. That rim diameter is directly tied to the 600-21 size, and it also matches the vehicle’s overall 21-inch wheel setup used with its bias-ply fitments. Rim diameter is the first wheel measurement that must align before any tire choice moves forward.

Wheel condition and width still deserve attention, especially on a nearly century-old automobile. A 21-inch diameter alone does not answer every fitment question, so the wheel should be checked for condition, true dimensions, and compatibility with the tire being considered, particularly if the car has been restored or modified at some point.

On a 1927 Buick 120 Master, 33X6.00 is an antique diameter-by-section size. The 33 refers to an approximate overall tire diameter in inches, while 6.00 refers to an approximate section width in inches. It is a bias-ply format from an earlier sizing era, so it reads differently than later numeric bias-ply sizes such as 600-21.

That difference matters because the size code reflects how the tire was identified, not just how wide it is. Buyers comparing 33X6.00 with 600-21 should verify the wheel setup and the tire currently on the car, then choose the format that best matches the vehicle’s present configuration and restoration goals.

Start with the basics: correct size, bias-ply construction, and confirmed 21-inch wheel fitment. From there, the meaningful choices in 600-21 center on brand, tire series, and sidewall appearance. Available options include Lester and BFGoodrich products, along with blackwall and wide whitewall styles, which can change the car’s overall visual character quite a bit.

It also helps to compare the wheel itself against the tire’s stated specifications when they are available. A restoration-minded owner may focus on traditional appearance first, while a roadgoing collector may also compare details such as rim-width range, load figure where stated, and how the finished tire will look in proportion to the car.

For the 1927 Buick 120 Master, available 600-21 products include blackwall and wide whitewall sidewall styles. Both are offered within bias-ply construction, so the decision is largely about appearance rather than changing the tire’s basic type. Blackwall gives a restrained traditional look, while wide whitewall creates a more formal and visually prominent presentation.

That choice should be made with the car’s restoration direction in mind. Some owners prefer a clean touring-car appearance, while others want a brighter side profile that emphasizes the car’s period presence. It is also smart to keep the sidewall treatment consistent across all four tires, and the spare as well, for a balanced finished look.

The 1927 Buick 120 Master has available 600-21 tire options from Lester and BFGoodrich. These choices appear in the Lester Classic Bias Ply and Silvertown Classic Bias Ply lines, both in bias-ply construction. That gives the buyer more than one period-style path without moving away from the vehicle’s traditional sizing and construction style.

Brand choice is only one part of the decision. Sidewall treatment, tire series, wheel compatibility, and the look you want on the finished car all matter just as much on a pre-war Buick. A buyer comparing these options should look at the full tire presentation rather than choosing by brand name alone.

A period-style 1927 Buick 120 Master starts with staying in the correct bias-ply family and confirming whether the car is set up for 33X6.00 or 600-21. That preserves the vehicle’s pre-war tire character far better than jumping to a modern-looking size. Once the correct fitment is confirmed, the choice becomes one of sizing format and visual presentation.

For many restorations, the deciding factors are whether the car should wear blackwalls or wide whitewalls and how closely the finished stance matches the owner’s historical goal. When exact originality matters, marque-specific references and restoration records remain the best way to verify the appearance details appropriate to the individual car.

Correct tire fitment matters a great deal on a 1927 Buick 120 Master because tire size strongly affects the car’s stance, proportions, and overall authenticity of presentation. Using the proper bias-ply fitment family also keeps the vehicle visually aligned with its era. On a car of this age, tires are part of the restoration story, not just a maintenance item.

Fitment also influences practical use. A tire that does not suit the wheel or the car’s existing setup can create avoidable issues with appearance, clearance, or serviceability. Careful measurement and comparison before purchase helps protect both the visual integrity of the restoration and the drivability of a collector vehicle that still sees road time.

Yes, modifications can affect tire fitment on a 1927 Buick 120 Master, even when the car is still using period-style bias-ply tires. Replacement wheels, brake updates, suspension work, or long-ago restoration changes can alter the wheel dimensions or available clearance. That is especially important when a car has changed hands several times over many decades.

A careful inspection should include wheel diameter, wheel width, tire-to-fender space, and steering clearance at full turn. The condition of springs and suspension components matters too, because a sagging or altered ride height can change how the tire sits in the body opening and how much room remains under load.

Before driving a 1927 Buick 120 Master on new tires, inspect the wheels for damage, verify that the tires match the actual wheel setup, and confirm proper inflation for the tire being used. It is also wise to check for even seating, valve condition, and any obvious interference around fenders, suspension parts, or steering components.

A collector car that has been parked for long periods deserves extra attention beyond the new tires themselves. Brake function, wheel bearings, suspension wear, and steering play should all be reviewed before regular road use. Taking a short, cautious first drive can help reveal rubbing, pull, vibration, or pressure loss before a longer outing.

600-21 tires on a collector 1927 Buick 120 Master should be maintained with regular pressure checks, visual inspections, and careful storage habits. Bias-ply tires on lightly used antique cars can age out long before tread is worn away, so sidewall cracking, cuts, bulges, and persistent air loss deserve attention even when the car is driven sparingly.

Storage conditions matter almost as much as miles traveled. Keeping the Buick away from prolonged sunlight, excessive heat, moisture, and ozone sources can help preserve the tires between drives. It also helps to inspect them before every outing and after longer storage periods, since old collector cars often spend more time standing than rolling.