1958 Morris Crowley Tires

A 1958 Morris Crowley uses either a 560-15 bias-ply tire or a 155R15 radial tire. Both sizes are associated with a 15-inch rim, so the key distinction is construction type and sizing format rather than wheel diameter.

The practical next step is confirming what is already on the car. A Morris that still has its traditional setup may suit a 560-15 bias-ply, while a car already running radial-compatible wheels and dimensions may point you toward 155R15. Wheel width, overall tire clearance, and any past modifications should be checked before changing from one construction style to the other.

The 1958 Morris Crowley uses a 15-inch rim with both of its associated tire sizes. That applies to the 560-15 bias-ply fitment and the 155R15 radial fitment, so rim diameter stays consistent even though the tire construction can differ.

Rim diameter is only part of the fitment picture. Width still matters, especially when moving between bias-ply and radial designs, because some products in these sizes are intended for different rim-width ranges. Measuring the actual wheel on the car is worthwhile if the Morris has replacement wheels or if its service history is unclear.

The 1958 Morris Crowley Base uses the same two fitment paths as the model overall: 560-15 in bias-ply construction and 155R15 in radial construction. Both are built around a 15-inch wheel, so the main difference is the tire type rather than the rim diameter.

That makes selection more about the car’s current setup and your intended use than about trim differences. A restoration-oriented Base may lean toward the traditional bias-ply format, while a road-driven car may be evaluated around the 155R15 radial. It is still smart to inspect wheel width and body clearance before assuming either setup belongs on a particular car.

On a 1958 Morris Crowley, 560-15 is the numeric bias-ply tire size. It uses the older inch-based bias-ply sizing format and is the traditional-looking fitment among the two sizes associated with this model.

That matters because a bias-ply tire affects both appearance and wheel compatibility considerations. If the goal is to keep the car’s period-style stance and sidewall look, 560-15 is the place to start. If a radial alternative is being considered instead, compare wheel width, tire dimensions, and clearance rather than assuming the change is automatic.

Radial equivalents for 560-15 include 155R15 and 560R15. The 155R15 is an 80-series metric radial equivalent, while 560R15 is a bias-look radial equivalent that keeps a more traditional visual theme while using radial construction.

Those options serve slightly different goals even though they relate back to the same original size. The 155R15 follows a Euro-metric convention, while 560R15 is aimed at owners who want a more vintage-style presentation. A 4 to 5 inch recommended rim-width range is associated with these equivalents, and wheel width and body clearance should both be confirmed first.

Start by confirming the car’s actual wheel diameter and width, then compare the intended radial size against the current bias-ply setup. For a 560-15 conversion, 155R15 and 560R15 are the radial-equivalent sizes to evaluate, and both should be treated as alternatives rather than automatic replacements.

Condition matters as much as size. Steering components, suspension wear, alignment condition, and available clearance around fenders and suspension points all deserve attention before the change. A collector car that has sat for long periods may also have older wheels or mixed components, so a careful inspection helps prevent choosing a radial that conflicts with the existing setup.

A 560-15 choice starts with deciding how traditional you want the car to look and how closely you want to stay with bias-ply construction. In this size, available options include blackwall, narrow whitewall, and wide whitewall tires from Firestone, US Royal, Coker Classic, and Pro-Trac.

Beyond appearance, compare the tire series and wheel-width requirements tied to each product. Some 560-15 offerings are oriented around classic passenger-car presentation, while another is a Front Runner design with a different character. Matching the tire to the car’s intended use and confirming wheel width will usually matter more than choosing purely by brand name.

The available sidewall styles for 1958 Morris Crowley tires include blackwall, narrow whitewall, and wide whitewall. The 155R15 radial choices are blackwall tires, while the 560-15 bias-ply range includes blackwall as well as both narrow and wide whitewall presentations.

Sidewall style can change the car’s look dramatically even when the tire size stays correct. A blackwall setup tends to keep things understated, while narrow and wide whitewalls push the car toward a stronger late-1950s visual theme. The best choice depends on how the Morris is being presented and whether the goal is road use, restoration flavor, or a mix of both.

Tires for the 1958 Morris Crowley are available from Firestone, Michelin, Avon, Vredestein, US Royal, Coker Classic, and Pro-Trac. Those brands cover both of the model’s fitment directions, with radial choices in 155R15 and bias-ply choices in 560-15.

Brand alone should not decide the purchase. It helps more to compare which series each brand offers, whether the tire is blackwall or whitewall, and how the product aligns with your preferred construction type. Once the correct size is confirmed, the best comparison points are appearance, intended use, and wheel compatibility rather than simple name recognition.

For a period-style 1958 Morris Crowley, the 560-15 bias-ply size is the most traditional starting point. It matches the older numeric sizing convention and is offered in blackwall, narrow whitewall, and wide whitewall versions that can shape the car’s visual character in different ways.

The right appearance choice depends on how strictly the car is being restored and what visual era you want to emphasize. If exact originality matters, compare your choice with marque-club guidance, period photos, or restoration records for your specific car. A radial such as 155R15 can still suit a vintage-looking build, but it presents the car differently.

Tire construction changes more than ride behavior on a restored 1958 Morris Crowley; it also changes the visual impression of the car. A 560-15 bias-ply keeps the older sizing style and supports a more traditional look, while a 155R15 radial gives the same 15-inch wheel diameter a more modern tire format.

Sidewall treatment plays into that decision as well. Bias-ply options in this application include blackwall, narrow whitewall, and wide whitewall choices, while the available radial selections are blackwall tires. Owners balancing authenticity, show presentation, and regular road use often decide on construction first and then use sidewall style to fine-tune the finished look.

Yes, modifications can affect tire fitment on a 1958 Morris Crowley even when the size itself is correct on paper. Aftermarket wheels, changed wheel widths, suspension alterations, brake updates, or bodywork repairs can all influence how a 560-15 or 155R15 tire sits and clears the car.

A small vintage car leaves less room for assumptions, so it helps to inspect the actual wheel and tire package before ordering. Check steering sweep, inner-fender space, and ride-height consistency, especially if the car has been rebuilt over many years. Fitment should be confirmed against the Morris as it exists now, not only as it may have left the factory.

Before driving a 1958 Morris Crowley on new tires, inspect the wheels, valve stems, lug seating surfaces, and overall suspension and steering condition. The tires themselves should be checked for proper inflation, visible seating on the rim, and adequate clearance at full steering lock and through normal suspension movement.

Collector cars often sit for long periods, so the road-readiness check should go beyond the tires alone. Look for worn bushings, loose tie-rod ends, leaking shocks, or uneven brake behavior that could make a fresh set of tires feel worse rather than better. A short local test drive is a smart way to verify tracking, vibration, and clearance.

Collector-car tires on a 1958 Morris Crowley should be maintained with regular pressure checks, routine visual inspections, and attention to age as well as tread. Whether the car runs 560-15 bias-ply tires or 155R15 radials, watch for cracking, bulges, cuts, irregular wear, and gradual air loss between drives.

Storage habits make a real difference on low-use vehicles. Keeping the Morris away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the rubber, and moving the car occasionally can reduce long-term flat spotting. Before any longer outing, verify inflation again and inspect the sidewalls closely since deterioration often appears there first.