1949 AC came from a British maker known for lightweight engineering, sporting character, and low-volume coachbuilt automobiles that sat well outside the mainstream American market. In that period, AC offered cars with a distinctly hand-built feel, and the Saloon reflected the firm’s refined pre-war roots as the postwar industry settled back into production. For 1949 AC, the tire decision is straightforward because the single model listed for the year uses one shared size, 550-17, in bias-ply construction on a 17-inch rim. The key step before choosing a tire is confirming that your car is the Saloon and deciding which sidewall treatment best matches your restoration goals and the way you want the finished car to present.
Which Tire Size Is Right for Your 1949 AC
There is one tire size available for 1949 AC, and it is used by the full model range listed for the year. Because there is no alternate size or construction to sort through here, the real choice comes down to selecting the right bias-ply presentation for the car’s style and restoration direction. Understanding that distinction before choosing a product helps you match the tire to both the wheel and the finished look of the car.
Year(s): 1949|Fit(s): Saloon|Construction: Bias Ply|Rim: 17 in
550-17 is a numeric bias-ply size in which 5.50 indicates the nominal section width and 17 identifies the wheel diameter in inches. BFGoodrich offers this size with Blackwall, Double-Whitewall, and Wide Whitewall sidewall styles, and the available products are bias-ply throughout. This is the year-correct fitment path for the 1949 AC Saloon, making it the natural choice for owners who want the steering feel, stance, and visual character associated with period construction.
One model is covered for 1949 AC. The fitment choice is simple because the model listed for the year uses the same 550-17 size, so once the model is confirmed, the remaining decision is mostly about sidewall appearance and how closely you want the car to reflect period presentation. Select the model below for more specific fitment context and product options.
1949 AC Saloon
The 1949 AC Saloon carried the make’s traditional British character into the early postwar years, blending compact luxury, coachbuilt flavor, and the understated engineering identity for which AC was known. Its tires mount on 17-inch wheels, and the available fitment stays within the bias-ply style that suits an authentic restoration of a car from this period.
Three products are available across one tire size for 1949 AC vehicles. In 550-17, BFGoodrich offers bias-ply fitments in Blackwall, Double-Whitewall, and Wide Whitewall styles, giving you several period-appropriate visual directions within the same size.
These FAQs focus on 1949 AC fitment in 550-17 bias-ply form, including what the size code means, which sidewall styles are available, how to approach setup on original 17-inch wheels, and how to care for a lightly used collector car.
Size Basics & Fitment
What tire sizes fit 1949 AC vehicles?
1949 AC vehicles in the model range listed here use one tire size: 550-17. That size applies to the 1949 AC Saloon and mounts on a 17-inch wheel. The available products in this fitment are all bias-ply, so there is no same-year radial alternative within the listed size range for this page.
That makes fitment research fairly direct compared with year-make pages that split across several models or wheel diameters. The main things to verify before choosing are that your car is indeed the 1949 AC Saloon, that the wheels are still the correct 17-inch type, and that the sidewall style you select matches the look you want for the finished car.
What does 550-17 mean on a 1949 AC tire?
On a 1949 AC, 550-17 is a numeric bias-ply tire size. The 5.50 portion is the nominal section width in inches, written in the older numeric style, and the 17 identifies the wheel diameter in inches. Because there is no radial construction marker in the size code, this is the traditional bias-ply format associated with the period.
That older sizing language matters because it reflects how the tire was originally specified and how reproduction collector tires are still grouped today. If you are comparing options, focus first on matching 550-17 exactly, then choose among the available sidewall appearances rather than trying to convert to a different modern format without checking the wheel and overall fitment strategy first.
Do all 1949 AC models use the same tire size?
The 1949 AC model covered here uses one tire size across the listed range: 550-17. The model shown for the year is the Saloon, and its fitment stays within that single numeric bias-ply size on a 17-inch rim. There is no split by model on this page because only one model core is included.
That means year and make alone get you very close, but confirming the body model still matters when researching a low-volume specialty marque like AC. Cars of this age are often restored, re-bodied, or modified over time, so it is wise to compare the tire size on the car now with the wheel diameter and the intended restoration standard before making your final choice.
Buying the Right Tire
What sidewall styles are available for 1949 AC tires?
1949 AC tires in 550-17 are available in Blackwall, Double-Whitewall, and Wide Whitewall form. All of those options are offered in the same bias-ply construction and the same size, so the difference is visual presentation rather than a change in basic fitment. Each style gives the car a different period look while keeping the original-size format intact.
Blackwall is usually the most understated choice, while whitewall variations create a more formal and more visually pronounced presentation. For a postwar British saloon, many owners choose the sidewall that best reflects the car’s restoration theme, export-market appearance, or personal taste. If authenticity matters for judging, compare your choice against period photos and marque-club guidance for your car’s intended presentation.
What brands make tires for 1949 AC vehicles?
BFGoodrich is the brand offered in the 550-17 fitment for 1949 AC vehicles on this page. The available tires are all part of the Silvertown Classic Bias Ply line and cover multiple sidewall appearances within that same size. There is not a multi-brand split to sort through here within the listed fitment.
That simplifies selection because you can concentrate on construction consistency and visual style rather than comparing several makers in the same size. Once the size is confirmed, the practical decision becomes choosing the sidewall treatment that suits your AC’s finish, trim character, and restoration goals, while keeping the original-style numeric bias-ply fitment intact.
What is the difference between the available 550-17 tires for the 1949 AC?
The listed 550-17 tires for the 1949 AC share the same basic construction, size, brand family, and 17-inch rim diameter. They are all BFGoodrich Silvertown Classic Bias Ply tires, and each listed example carries the same 18-pound weight figure. The meaningful difference among them is sidewall styling: Blackwall, Double-Whitewall, or Wide Whitewall.
Because the size and construction stay the same, your decision is mostly about how the car should look when completed rather than choosing between different fitment categories. Owners pursuing a restrained period appearance often lean toward blackwalls, while those restoring a more dressy or show-oriented presentation may prefer one of the whitewall versions to emphasize the car’s formal postwar character.
Fitting & Setup
What rim width do 1949 AC tires require?
The listed fitment for 1949 AC uses a 17-inch rim diameter, but the available information here does not separate the 550-17 products by published rim-width range. What is clear is that the tire is intended for the correct 17-inch wheel diameter used with this fitment. Keeping the tire matched to the proper wheel diameter is the first setup requirement.
On an older specialty car like a 1949 AC, original wheels may have been repaired, replaced, or swapped during restoration, so measuring and identifying the actual wheel before mounting tires is worth the effort. If you are working with original or restored rims, have the wheel inspected for condition, bead-seat integrity, and true running as part of the installation plan.
Do 1949 AC tires require inner tubes?
The available 550-17 products for 1949 AC do not carry a tube-type or tubeless marker in the size listing here, so the choice should be made by confirming the wheel design and the specific tire’s sidewall marking before installation. That is especially important on postwar collector cars that may still use original-style rims. Tube decisions are as much about the wheel as the tire itself.
If your AC still uses original wheels, have the installer inspect the rim profile, valve-hole configuration, and overall wheel condition rather than assuming a modern setup standard. Matching the tire to the wheel correctly helps prevent avoidable sealing or setup issues, and it is one of the simplest checks you can make before the car goes back on the road.
Maintenance, Storage & Longevity
How should I store a 1949 AC when the tires are fitted?
A 1949 AC should be stored in a cool, dry space away from direct sunlight, electric motors, battery chargers, welders, or other ozone-producing equipment that can age the rubber prematurely. Because the listed fitment is bias-ply, long static periods can encourage temporary flat-spotting more readily than many modern radial tires. Clean floors, stable temperatures, and correct inflation all help the tires hold their shape better.
If the car will sit for an extended period, move it occasionally so one section of the tread is not carrying the load continuously, or consider stands if the storage plan and suspension support are handled correctly. Keeping the tires out of sunlight and away from damp conditions matters just as much as mileage on a collector car that is only driven seasonally.
How long do tires on a 1949 AC typically last?
Tires on a 1949 AC should be judged more by age and condition than by tread wear alone. A collector car can show very little mileage yet still need replacement because rubber compounds age over time. Many owners begin evaluating collector tires closely around the five- to seven-year range and consider replacement as they approach roughly ten years, depending on storage history and condition.
Check the date code and inspect the sidewalls, tread surface, and overall casing regularly instead of assuming low use equals long life. A bias-ply tire that looks period-correct can still be past its useful service life if it shows cracking, hardening, or signs of structural age. On a lightly used AC, calendar age is usually the more important number.
How often should tires on a 1949 AC be inspected?
Tires on a 1949 AC should be inspected before every drive and again before any longer outing. Look for visible cracking, cuts, bulges, irregular wear, and pressure loss, and make sure the tread and sidewalls still feel serviceable for the kind of trip you have planned. On a collector car, small age-related changes can matter more than mileage.
A longer drive deserves an extra check of the spare, valve stems, and the wheel itself, especially if the car has spent much of its life in storage. Regular inspection gives you time to catch age-related deterioration early and is one of the best habits for keeping an older AC dependable on occasional road use.
Restoration & Authenticity
What tires were originally fitted to the 1949 AC Saloon?
A 1949 AC Saloon from this era would have been built around bias-ply tire practice, and the listed fitment for the year is 550-17 in bias-ply construction. That aligns with what buyers expect from a postwar car that still carries pre-radial sizing conventions. The proper original-style direction is therefore the 550-17 numeric bias-ply format rather than a later radial-coded alternative.
Owners pursuing historical accuracy should focus first on matching the size, construction type, and sidewall appearance to the intended presentation of the car. If your AC is being judged or restored to a particular market specification, compare your choice with period photos, factory literature, and marque-club guidance before finalizing the sidewall treatment.
Does correct tire fitment matter for showing a 1949 AC?
Correct tire fitment matters on a 1949 AC because show judging often considers whether the tire size, construction type, and sidewall style suit the vehicle’s era and character. For a postwar British saloon using 550-17 bias-ply sizing, an obviously later-looking construction or an inappropriate visual treatment can affect how authentic the restoration appears. Even when the wheel diameter is correct, presentation details still stand out.
That does not mean every car must be restored to the same finish, but owners who care about authenticity should treat tire appearance as part of the restoration, not an afterthought. A sidewall style that complements the car’s intended market look and period can help the whole vehicle read correctly, especially on a refined low-volume make such as AC.
What is the difference between blackwall and whitewall 550-17 tires for the 1949 AC?
For the 1949 AC, the blackwall and whitewall 550-17 options share the same basic fitment, brand family, and bias-ply construction. The difference is visual character: blackwall gives a more restrained, utilitarian presentation, while double-whitewall and wide whitewall versions add a more formal and more decorative period look. The tire size itself does not change between those options.
That makes the choice largely a restoration question rather than a dimensional one. Owners restoring a sober British saloon often favor the simpler look of blackwalls, while others prefer a whitewall treatment to emphasize elegance and presence. If your AC will be shown, pick the sidewall style that aligns with the way you want the car judged and remembered.
Safety & Road Use
Are 1949 AC tires safe for highway driving?
1949 AC tires in the listed 550-17 fitment are available in bias-ply construction, which can be used on the road when the tires are in sound condition, correctly installed, and matched to a mechanically healthy car. Bias-ply tires deliver an authentic driving character, but they do not feel the same as later radial designs in tracking and response. Safe road use depends heavily on condition, inflation, wheel integrity, and the overall state of the vehicle.
On a 1949 AC, the car’s own age-related mechanical limits are often as important as the tire itself once speeds rise. Before planning regular highway use, make sure the suspension, steering, brakes, and alignment are all in proper order. A well-sorted vintage car on fresh, correctly fitted tires is a very different experience from one running on aged rubber or neglected chassis components.
What inflation pressure should I use for 1949 AC tires?
Inflation pressure for a 1949 AC should be set by the vehicle manufacturer’s recommendation for the car and by the tire maker’s guidance for the specific 550-17 tire you choose. The products listed here do not separate one pressure specification from another within this page, so pressure should not be guessed from another size or another car. Correct inflation is essential for tread shape, ride quality, and casing life on a bias-ply tire.
The best approach is to start with the factory recommendation for the vehicle, then confirm that it aligns with the tire manufacturer’s stated operating guidance for that exact tire. Avoid inflating solely to a sidewall maximum unless the tire maker specifically directs it for the application. Consistent pressure checks matter on collector cars that may sit for weeks between drives.
What should I check before taking a 1949 AC on a longer drive?
Before taking a 1949 AC on a longer drive, inspect all four tires for cracking, cuts, bulges, uneven wear, and proper inflation, and make sure the spare is also usable. On an older car, the wheels and valve stems deserve attention along with the tread and sidewalls. The basic tire check should be part of a broader pre-drive review that includes brakes, steering, fluids, and lighting.
A vintage AC rewards careful preparation because even a short mechanical issue can turn a pleasant trip into a recovery job. Give the car a road-test close to home after any long storage period, listen for vibration or pull, and confirm that the tires settle into normal running behavior before committing to a longer outing.
