The 1959 Wolseley 6/90 sits in the postwar British saloon tradition, combining formal styling with the kind of road manners that made large Wolseleys appealing as distinguished touring cars. For owners today, tire choice shapes not only how the car looks at the curb, but also how it presents itself on the road. This model uses either a 640-15 bias-ply tire or an 185R15 radial, both on 15-inch rims. That opens the door to traditional blackwall and whitewall bias-ply choices, along with radial options in blackwall, narrow whitewall, and redline form. The real decision is whether to preserve a period-style bias-ply character or move toward a radial setup with careful wheel and clearance checks.
Which Tire Size Is Right for The 1959 Wolseley 6/90
The 1959 Wolseley 6/90 uses two primary tire sizes, and the difference is centered on construction rather than wheel diameter. Both fit a 15-inch rim, but one is a traditional 640-15 bias-ply and the other is an 185R15 radial, so the first step is deciding whether the car is staying with its bias-ply presentation or running a radial setup.
185R15 is a Euro-metric radial size in which 185 refers to nominal section width in millimeters, R indicates radial construction, and 15 is the rim diameter in inches. On a 1959 Wolseley 6/90, this size represents the radial fitment path and gives the car a more modern sizing convention while keeping the same 15-inch wheel diameter. Available choices include Coker Classic, Michelin, Avon, and Universal Vintage Tire offerings, with blackwall, narrow whitewall, and redline sidewall treatments across several radial series. It is the size to evaluate when the car already uses radial-compatible wheels or when a road-use-oriented setup is the goal.
640-15 is a numeric bias-ply size, with 6.40 indicating nominal section width in inches and 15 identifying the rim diameter. On the 1959 Wolseley 6/90, this is the traditional bias-ply fitment and it suits buyers who want the tire's visual character to stay closer to a period-style presentation. The size is available from BFGoodrich, Firestone, Avon, and Excelsior, with blackwall, narrow whitewall, and wide whitewall choices in several classic bias-ply series. It is the right place to start when maintaining original-style construction and sidewall appearance matters more than moving to a modern radial format.
Tire fitment is straightforward for the covered 1959 Wolseley 6/90 sub-model because the same two primary sizes appear across it. Checking the exact sub-model still matters so the car's current wheel and construction setup can be matched to the right tire family.
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1959 Wolseley 6/90 Base
The 1959 Wolseley 6/90 Base uses the same 15-inch-rim fitment pattern, with both 185R15 radial and 640-15 bias-ply options associated with the car. Tire selection comes down to whether the goal is a traditional bias-ply look, a radial driving setup, or a specific sidewall treatment that suits the car's presentation.
Bias-Ply to Radial Tire Conversion for the 1959 Wolseley 6/90
The 640-15 bias-ply size has three radial-equivalent options. Those are 175R15 as an 80-series metric radial, P175/75R15 as a 75-series P-metric radial, and P185/70R15 as a 70-series P-metric radial. Each option approaches the original size through a different sizing convention and profile style rather than through the same bias-ply format. A 5-6 inch rim-width range is associated with these equivalents, so wheel width, overall dimensions, and clearance should be confirmed before making a conversion.
Modern Radial Equivalents
175R15
Equivalent 80-series Metric Radial (640-15)
P175/75R15
Equivalent P-metric 75-series Radial (640-15)
P185/70R15
Equivalent P-metric 70-series Radial (640-15)
Important Considerations When Replacing Bias Ply With Radial
Compare overall diameter and section width carefully to ensure proper fit.
Verify recommended rim range (5-6 in) and load needs match your vehicle specifications.
Check fender clearance, steering clearance, and stance before installation.
Consider suspension condition and intended road use when choosing equivalents.
Important Fitment Notes
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 1959 Wolseley 6/90 Tires for Sale
Available 1959 Wolseley 6/90 tire choices span both 640-15 bias-ply and 185R15 radial fitments, with brands including BFGoodrich, Firestone, Michelin, Avon, Excelsior, Coker Classic, and Universal Vintage Tire. The main comparisons are construction, tire series, and sidewall style, from blackwall and whitewall presentations to redline radial options.
These FAQs focus on the exact tire questions that matter for a 1959 Wolseley 6/90, including size selection, 15-inch rim fitment, bias-ply versus radial choices, radial equivalents for 640-15, period-style appearance, and road-use checks before driving.
Tire Size & Fitment
What tire size fits a 1959 Wolseley 6/90?
A 1959 Wolseley 6/90 uses two primary tire sizes: 640-15 in bias-ply construction and 185R15 in radial construction. Both sizes are associated with 15-inch rims, so the main distinction is not wheel diameter but the tire type and sizing system being used on the car.
That means the first step is confirming whether the car is set up for a traditional bias-ply tire or for a radial. Many collector cars have been converted over the years, so the actual wheel width, the car's current clearance, and the appearance goal should all be checked before choosing between the two sizes.
What size rim does a 1959 Wolseley 6/90 use?
The 1959 Wolseley 6/90 uses a 15-inch rim with both of its primary tire sizes. That applies to the 640-15 bias-ply fitment and the 185R15 radial fitment, so rim diameter stays consistent even though the tire construction changes.
Rim diameter alone does not settle the entire fitment question. Wheel width should also be checked, especially if the car has changed from bias-ply to radial tires at some point, because product specifications within these sizes use different width ranges and that can affect tire choice and overall presentation.
What does 640-15 mean on a 1959 Wolseley 6/90?
640-15 is a vintage numeric bias-ply size. The 6.40 portion refers to nominal section width in inches, while the 15 refers to the wheel diameter in inches. On the 1959 Wolseley 6/90, it is the traditional bias-ply size and carries the car's more period-style tire look.
Buyers often compare 640-15 with modern radial sizing, but the two systems are not written the same way and should not be treated as automatic swaps. The useful next step is deciding whether the car should remain on a classic bias-ply tire or be evaluated against one of the available radial-equivalent sizes.
Bias-Ply & Radial Options
Is 640-15 a bias-ply or radial tire for the 1959 Wolseley 6/90?
640-15 is the bias-ply tire size associated with the 1959 Wolseley 6/90. It uses the older numeric sizing system and is available in traditional bias-ply product lines, including blackwall, narrow whitewall, and wide whitewall presentations.
That matters because choosing 640-15 is not just choosing a size, but also choosing the tire's construction and visual character. A car already running radial tires may need wheel-width and clearance confirmation before returning to a bias-ply setup, especially if previous owners changed wheels or suspension components.
What radial tire sizes are equivalent to 640-15?
Radial equivalents for 640-15 include 175R15, P175/75R15, and P185/70R15. Those represent an 80-series metric radial, a 75-series P-metric radial, and a 70-series P-metric radial, giving the 1959 Wolseley 6/90 several radial sizing formats to consider from the original bias-ply starting point.
A recommended rim-width range of 5-6 inches is associated with these equivalent sizes. Even with that guidance, the decision should still include checking wheel width, tire-to-body clearance, and the car's overall setup, since an equivalent size is a comparison option rather than an automatic one-size-fits-all replacement.
What should I check before converting my 1959 Wolseley 6/90 from bias-ply to radial tires?
A conversion from 640-15 bias-ply to a radial on a 1959 Wolseley 6/90 starts with confirming the 15-inch wheel diameter and the wheel's actual width. Then compare the intended radial size, such as 175R15, P175/75R15, or P185/70R15, against the car's clearance and current ride-height setup.
The practical side of the decision includes steering clearance, fender clearance, suspension condition, and whether the car still carries its original wheel arrangement. A radial can also change the visual tone of the car, so owners focused on restoration appearance often weigh the look of the tire as carefully as the construction itself.
Choosing the Right Tire
What should I consider when choosing a tire for a 1959 Wolseley 6/90?
Start with the correct primary size and construction for the way the car is set up: 640-15 for bias-ply or 185R15 for radial. From there, compare wheel-width suitability, sidewall style, available tire series, and whether the car is being kept in a more traditional presentation or prepared for regular road use.
The best choice depends on the car's actual wheels and the owner's priorities rather than on size alone. A Wolseley used for shows may lean toward a period-style bias-ply appearance, while a driver already converted to radial tires may be better matched to one of the 185R15 radial options.
What sidewall styles are available for 1959 Wolseley 6/90 tires?
The 1959 Wolseley 6/90 has a broad sidewall range across its available tires. Blackwall appears in both radial and bias-ply options, narrow whitewall appears in both constructions as well, wide whitewall is available in 640-15 bias-ply, and redline appears among 185R15 radial choices.
Sidewall style affects the car's visual character more than many buyers expect. A whitewall can emphasize the formal saloon look, a blackwall keeps the presentation more restrained, and a redline radial creates a more specialized appearance, so the right choice usually depends on restoration goals and how the car is meant to be seen.
What brands offer tires for the 1959 Wolseley 6/90?
Tires for the 1959 Wolseley 6/90 are available from BFGoodrich, Firestone, Michelin, Avon, Excelsior, Coker Classic, and Universal Vintage Tire. Brand selection varies by size and construction, with 640-15 bias-ply and 185R15 radial options drawing from different product lines and series.
Brand name should be only one part of the decision. It helps more to compare each option by size, construction, sidewall treatment, tire series, and wheel compatibility, because those factors shape how closely the tire matches the car's existing setup and the owner's intended appearance.
Restoration & Appearance
Which tire should I choose for a period-style 1959 Wolseley 6/90?
For a period-style 1959 Wolseley 6/90, the 640-15 bias-ply size is the most natural starting point. That size is available in traditional bias-ply series from BFGoodrich, Firestone, Avon, and Excelsior, with blackwall, narrow whitewall, and wide whitewall options that suit a restoration-oriented presentation.
The final choice depends on how closely the car is being restored and what visual statement is desired. Owners pursuing exact originality should still compare against marque references or historical documentation, while buyers aiming for a strong period-style look can focus on the right size, construction, and sidewall treatment.
How does tire construction affect the appearance of a restored 1959 Wolseley 6/90?
Tire construction changes the overall visual impression of a restored 1959 Wolseley 6/90 more than the size code alone suggests. A 640-15 bias-ply gives the car a distinctly traditional stance and sidewall character, while an 185R15 radial presents the same 15-inch wheel diameter through a more modern tire format.
That difference matters on a formal British saloon where proportions and detailing are part of the appeal. Sidewall choice adds another layer, since blackwall, whitewall, and redline treatments each shift the look, so restoration-minded owners usually decide on construction and sidewall style together rather than separately.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1959 Wolseley 6/90?
Yes, modifications can affect tire fitment on a 1959 Wolseley 6/90 even when the tire size itself is correct. Aftermarket wheels, wheel-width changes, suspension work, ride-height changes, or body repairs can all influence how a 640-15 or 185R15 tire sits and clears the car.
A modified car should be checked more carefully than an untouched one. Wheel diameter may still be 15 inches, but steering clearance, fender clearance, and the relationship between the tire and the wheel can change enough that a familiar size needs to be evaluated against the car's current configuration.
What should I inspect before driving a 1959 Wolseley 6/90 on new tires?
Before driving a 1959 Wolseley 6/90 on new tires, inspect wheel condition, verify tire pressure, and make sure the tire seats properly on the rim. A short visual check for rubbing at full steering lock and for adequate clearance around fenders and suspension points is also a sensible first step.
Collector cars often reveal issues only after sitting or after a long-overdue tire change. It is wise to watch for uneven stance, air loss, vibration, or contact marks during the first drives, since those signs can point to wheel-width mismatch, alignment issues, or a setup that needs further inspection.
How should tires on a collector 1959 Wolseley 6/90 be maintained?
Tires on a collector 1959 Wolseley 6/90 should be checked regularly for pressure, visible cracking, cuts, bulges, and uneven wear, even if the car is driven only occasionally. Low-use vintage cars can age tires through time and storage conditions long before tread wear becomes the deciding factor.
Proper storage helps preserve both bias-ply and radial tires. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources can reduce deterioration, and periodic inspections before local drives or longer trips help catch age-related issues before they become road-use problems.
