1958 Hillman Tire Fitment Guide

1958 Hillman vehicles use two tire sizes: 155R15 and 560-15. Both sizes apply to the 1958 Hillman Husky and the 1958 Hillman Minx II, and both mount on 15-inch rims. For rim width, the 155R15 radial products are listed for 4.00 to 5.50-inch rims, while 560-15 bias-ply products are listed for either a 4.5-inch rim or a 4.50 to 5.50-inch rim depending on the specific tire.

That means most buyers are choosing between construction types rather than trying to solve a model-specific fitment puzzle. If your priority is an authentic late-1950s look and feel, the 560-15 bias-ply size is the traditional route; if you want a radial in a compatible 15-inch fitment, 155R15 is the size to focus on. Checking the actual wheel width before ordering is still worthwhile, especially if the car has been restored with replacement wheels.

On a 1958 Hillman, 560-15 is a numeric bias-ply tire size. The “560” is the nominal section-width designation used in period American and European replacement-tire practice, and the “15” is the rim diameter in inches. In the currently available 560-15 choices for Hillman fitment, the construction is bias-ply and the sidewall styles include both narrow whitewall and wide whitewall versions.

For a Hillman owner, that size points you toward a more vintage-style tire rather than a modern radial format. It is especially useful when the goal is to preserve the look and general driving character associated with late-1950s small cars. You will still want to compare the whitewall treatment you prefer and confirm that the tire’s approved rim width matches the wheel on your Husky or Minx II.

On a 1958 Hillman, 155R15 is a radial metric size. The “155” refers to nominal section width in millimeters, the “R” identifies radial construction, and the “15” is the rim diameter in inches. In vintage applications like this one, a 155R15 size generally follows the older Euro-metric convention that corresponds to an 80-series profile, and available versions include T-rated and H-rated products.

That makes 155R15 the size to investigate if you want a radial while staying within a period-appropriate small-car diameter class. It is offered as a blackwall in this application, so the visual character is different from the whitewall bias-ply options in 560-15. Because some 155R15 products are tube-type while others are tubeless, the sidewall marking on the exact tire matters before installation decisions are made.

For a 1958 Hillman, the clearest difference is construction. The 560-15 is a bias-ply tire that delivers the period-correct type of fitment associated with late-1950s compact British cars, while the 155R15 is a radial alternative that keeps the same 15-inch rim diameter but changes the tire’s construction and overall road character. Both sizes fit the Husky and Minx II, so the decision is not tied to one model or the other.

Owners restoring a car for authenticity, vintage presentation, or traditional steering feel often gravitate to 560-15. Owners who plan to drive more regularly on modern roads often look at 155R15 because the radial format better aligns with contemporary driving expectations. Either way, settle the construction choice first, then compare sidewall style, tube marking, and approved rim width within that size.

1958 Hillman tire choices include blackwall radials in 155R15 and whitewall bias-ply tires in 560-15. Within the bias-ply size, both narrow whitewall and wide whitewall versions are available. That gives Hillman owners a clear visual split between a more understated blackwall radial presentation and a brighter, more period-styled whitewall bias-ply appearance.

The right choice depends on how you want the car to read visually and historically. A blackwall radial usually suits an owner who values a cleaner driver-oriented look, while whitewall bias-ply tires align more closely with the presentation many collectors expect from a 1950s restoration. If you are building toward a judged standard, confirm whether the event or club favors a particular sidewall treatment for your market and trim level.

1958 Hillman tire options come from Firestone, Michelin, and US Royal. In 155R15 radial form, the available brands are Firestone and Michelin. In 560-15 bias-ply form, the available brands are Firestone and US Royal. Each brand brings a slightly different combination of sidewall presentation and product specification within those two shared Hillman sizes.

That brand spread gives you room to narrow the choice by construction, appearance, and individual tire details rather than by fitment alone. If you want a radial, your search centers on Firestone and Michelin blackwalls; if you want a bias-ply whitewall, Firestone and US Royal are the relevant names. Once you decide on the size family, compare each tire’s tube marking, speed rating if shown, and approved wheel-width range.

For 1958 Hillman fitments, 155R15 radial tires are listed with approved rim widths of 4.00 to 5.50 inches on the products that specify wheel width. The 560-15 bias-ply tires are listed either for a 4.5-inch rim or for a 4.50 to 5.50-inch rim, depending on the exact tire. Both sizes use a 15-inch rim diameter, but the approved width range still needs to match the wheel on the car.

That matters because two tires can share the same rim diameter and still differ in how broadly they fit across wheel widths. Before mounting anything, measure or verify the actual wheel width rather than assuming every original-looking 15-inch wheel is the same. That is especially important on cars that may have had wheels swapped over the decades during restoration, storage, or routine service life.

Inner-tube requirements on 1958 Hillman tires depend on the exact product. Within the 155R15 radial size, some options are marked TL for tubeless while others are marked TT for tube type, so tube status varies by product. The available 560-15 bias-ply listings here do not carry TT or TL markers in the size line, so the exact sidewall marking on the tire you choose should guide the final installation decision.

That means a Hillman owner should not assume every tire in the same nominal size installs the same way. If your car still uses original-style wheels, having the wheel condition and valve-stem area checked is wise before deciding on a tubeless radial or a tube-type setup. When the sidewall marking and the wheel design do not clearly align, a marque specialist or experienced vintage tire installer can help sort it out.

Original 1958 Hillman wheels can generally be used with both listed tire sizes because both 155R15 and 560-15 are 15-inch fitments. That shared rim diameter is the key point that lets both sizes sit within the same basic wheel family. The remaining question is wheel width, since the available tires have specific approved rim-width ranges that should be matched against the wheel actually on the car.

In practical terms, many Hillman owners are deciding between bias-ply and radial without changing wheel diameter. Still, do not treat diameter alone as the whole answer. A wheel that is correct in diameter but outside the recommended width range for the exact tire can create avoidable fitment or handling compromises, so checking the wheel before mounting is a smart final step.

A 1958 Hillman should be stored out of direct sunlight, away from electric motors, battery chargers, welders, and other ozone-producing equipment that can age rubber prematurely. Keep the car in a dry, stable environment and maintain normal inflation while it sits. Bias-ply tires such as 560-15 are more prone to temporary flat-spotting during long static periods, while any vintage-style tire can suffer cosmetic cracking if stored near heat and ozone sources.

For a Hillman that rests for extended stretches, rolling the car periodically helps avoid one section of the tread carrying the load for months at a time. If the car will be parked for a very long interval, some collectors use stands to reduce sustained weight on the tires, but only if the car is supported correctly. Clean, covered storage and occasional movement do more for tire life than mileage alone on most collector cars.

Tires on a 1958 Hillman should be judged more by age and condition than by tread wear, because collector cars often accumulate very few miles. A good rule is to begin careful age-related evaluation in the five-to-seven-year range and to treat roughly ten years as the point where replacement deserves serious consideration even if the tread still looks serviceable. The DOT date code on the tire sidewall is the reference point for age.

That approach matters because an older Hillman may sit indoors, appear well preserved, and still be riding on rubber that has hardened or weakened over time. Sidewall cracking, loss of flexibility, vibration, or a tire that no longer holds pressure consistently are all stronger warning signs than tread depth alone. If the date code and condition suggest the tires are aging out, replacement is wiser than trying to stretch another season from them.

Tires on a 1958 Hillman should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, irregular tread wear, lodged debris, and pressure loss. If your chosen tire setup is tube-type, include the valve stem and any signs of tube-related seepage or sudden pressure change in that routine check, since those issues can hide until the car is put back into motion.

A quick visual and pressure check is especially important on collector vehicles because they often sit between drives and then return straight to road use. A Hillman that feels fine around town can reveal storage-related tire problems only when speeds rise and the tires build heat. Five minutes in the garage before departure is usually enough to catch the kind of age-related problem that turns a pleasant drive into a preventable roadside stop.

A 1958 Hillman Husky would have been associated with bias-ply tire practice in its period, and the 560-15 size is the most direct fitment here for that type of restoration approach. The radial 155R15 is a useful later-style alternative for drivers, but it does not represent the construction type most buyers would associate with original late-1950s small-car delivery. Original-equipment branding could vary by market, so construction type and size are the more dependable authenticity starting points.

For a restoration, that means the safest path is usually to begin with 560-15 and then choose the sidewall style that best suits the way your Husky is being presented. A whitewall choice can change the whole personality of the vehicle, so it is worth checking period photos, sales literature, and Hillman club resources for market-specific guidance. Those sources are often better than memory when a wagon has been repainted or re-trimmed over time.

Correct tire fitment matters on a 1958 Hillman because judges and knowledgeable enthusiasts often notice size, construction, and sidewall style before they notice finer technical details. A 560-15 bias-ply tire aligns more closely with the period than a radial, and sidewall treatment can also affect whether the car reads as authentically restored. A visibly modern-looking tire or an era-inappropriate sidewall can stand out even on an otherwise carefully finished Hillman.

That does not mean every show demands the same standard, but it does mean tire choice should be treated as part of the restoration plan rather than an afterthought. Local shows may be relaxed, while marque events and higher-level judging can be more particular about what looks correct for the year and market. If awards matter, confirm expectations with the hosting club before mounting a tire that is mechanically suitable but visually out of period.

For a 1958 Hillman running 560-15 bias-ply tires, both Firestone and US Royal offer narrow whitewall and wide whitewall versions with the same listed load figure of 970 pounds at 32 psi. The Firestone versions are listed for a 4.5-inch rim, while the US Royal versions carry a broader listed rim-width range of 4.50 to 5.50 inches. The Firestone tires are listed at 18 pounds and the US Royal versions at 17 pounds.

That means the choice is less about one brand being universally right and more about which specification better matches your wheel and preferred look. If your Hillman’s wheel width falls toward the wider end of the range, the US Royal specification may be especially relevant. If you are refining the car’s appearance for restoration presentation, the final decision may come down to the whitewall width you want and how the tire sits visually on the wheel.

1958 Hillman tires can be suitable for highway driving when they are the correct size, in sound condition, and used within their design limits. In the 155R15 radial options, T-rated products are rated up to 118 mph and H-rated products up to 130 mph. The 560-15 bias-ply options listed here do not carry modern speed letters in the same way, so their safe use depends more heavily on condition, inflation, and the realistic operating envelope of a late-1950s small British car.

For most owners, the larger issue is not chasing top speed but making sure the entire vehicle is ready for sustained modern traffic. Brakes, steering, suspension, wheel bearings, and alignment all matter at least as much as the tire itself on a vintage Hillman. A fresh tire cannot compensate for worn chassis parts, but a properly sorted car on the right tires can be very enjoyable on secondary roads and moderate highway use.

Inflation pressure for 1958 Hillman tires should not be guessed from one size and applied to the other. Among the currently available products, 560-15 bias-ply tires are listed at 970 pounds maximum load at 32 psi, while one 155R15 radial is listed at 1045 pounds maximum load at 44 psi. Those figures are tire ratings, not blanket vehicle-pressure recommendations, so they should be read alongside the vehicle manufacturer’s original guidance for normal operation.

The practical approach is to use the Hillman owner’s manual or workshop literature for the car’s baseline inflation target, then make sure the tire you choose is being used within the manufacturer’s rated range. Radials and bias-ply tires can behave differently even when they fit the same wheel diameter, so avoid transferring old pressure habits from one construction type to the other. Uneven wear, wandering, and harshness can all be signs that pressure needs to be revisited.

Before a longer drive in a 1958 Hillman, inspect each tire for cracking, cuts, bulges, punctures, irregular wear, and pressure loss, then check the spare as well. If the car is running a tube-type setup, pay close attention to valve stems and any history of slow leaks. Tire readiness should be part of a wider mechanical review that also includes fluids, brakes, steering play, wheel-bearing condition, and basic lighting, since an older car asks more of the owner than a modern daily driver does.

That routine matters because a lightly used Hillman may look ready while age-related issues are quietly developing in the tires or chassis. A short local test drive before a full outing can reveal shimmy, pull, or vibration that is easy to miss when the car is only moved around the garage. If anything feels different from the car’s normal behavior, address it before committing to distance rather than hoping it will settle down on the road.