Sunbeam Minx Tires
The Sunbeam Minx of 1966 to 1967 came from the final years of Rootes-era small British family cars, when practical sedans were increasingly expected to balance tidy proportions, economy, and more modern road manners. Sunbeam Minx models from this period sit in an interesting place for tire selection because they can appear with either period-style bias-ply sizing or a modernized radial size that reflects the industry's transition in construction and sizing language. For a buyer sorting out the correct fitment, the important first step is confirming whether the car is set up for the original-style 13-inch bias-ply fitment or for the 13-inch radial size now commonly associated with later driving expectations.
Sunbeam Minx Tire Size Guide
Sunbeam Minx fitments across 1966 to 1967 use 2 distinct tire sizes, and both are built around 13-inch wheels. One size is a period-style numeric bias-ply fitment, while the other is a radial size more familiar to later drivers. Choosing correctly starts with identifying whether the car is being kept in a more original bias-ply configuration or driven on radial tires with the same rim diameter.
165R13 is the radial fitment listed for Sunbeam Minx models from 1966 through 1967. The code denotes a 165 mm section width radial tire for a 13-inch rim, and the available products are built for 13-inch wheels with listed rim widths from 4.50 to 6.00 inches. Choose this size when the car is set up for radial tires and you want later-style road behavior while staying within the listed 13-inch fitment.
600-13 is the period-style numeric bias-ply size listed for Sunbeam Minx models from 1966 through 1967. The 600 figure is the nominal section width with the decimal omitted, indicating an approximately 6.00-inch-wide tire for a 13-inch rim, and the listed products fit 13-inch wheels with rim widths from 4.00 to 4.50 inches. Choose this size when preserving a traditional bias-ply look and feel on the listed wheel width range, and note that a tube is required.
Sunbeam Minx Tires by Year
The year listing breaks out which tire sizes are associated with each 1966 and 1967 Sunbeam Minx. Both years show two sizes, reflecting a construction split between radial and bias-ply options rather than a wheel diameter change. Use the year first, then match the car's wheel width and intended driving character to the listed size.
1966 Sunbeam Minx
- 165R13
- 600-13
1967 Sunbeam Minx
- 165R13
- 600-13
Best Sunbeam Minx Tires for Sale
Available Sunbeam Minx tire options span 3 brands and 5 products across 165R13 and 600-13 sizes. Confirm the correct size, construction type, and 13-inch rim fitment on the actual car before selecting.
165R13 Products
These are the available products for 165R13.
600-13 Products
These are the available products for 600-13.
Frequently Asked Questions
The FAQ for Sunbeam Minx tires addresses the two-size overlap used in 1966 and 1967, the difference between bias-ply and radial constructions, and the practical checks that matter before fitting a 13-inch tire to a collector-driven British car.
Size Basics & Fitment
Sunbeam Minx models in this range use two listed tire sizes: 165R13 and 600-13. Both sizes apply to 1966 and 1967 models, and both are built for 13-inch rims. The 165R13 options are radial tires, while the 600-13 options are bias-ply tires. The radial products list rim widths from 4.50 to 6.00 inches, and the bias-ply products list rim widths from 4.00 to 4.50 inches.
That means year alone is not enough to choose the right tire for a Sunbeam Minx. You also need to verify whether the car is set up for the narrower original-style bias-ply wheel range or for a wider radial-compatible wheel. If the car is restored for period appearance, the 600-13 bias-ply size will usually be the more traditional direction. If it is driven more regularly and already fitted for radial use, 165R13 may be the more appropriate match.
On a Sunbeam Minx, 600-13 is a numeric bias-ply tire size. The 600 indicates a nominal section width of about 6.00 inches, with the decimal omitted in older sizing practice, and the 13 indicates the wheel diameter in inches. The listed 600-13 products are bias-ply tires for 13-inch rims and are intended for rim widths from 4.00 to 4.50 inches.
That older numeric format matters because it does not translate directly into modern metric sizing by appearance alone. A buyer working with a Sunbeam Minx should check the wheel width and the car's restoration goals before moving between 600-13 and 165R13. The bias-ply size supports a more period-correct stance and feel, while the radial size belongs to a different construction approach. For the listed 600-13 products, a tube is required.
A 1966 Sunbeam Minx has two listed tire sizes because the fitment split is by construction type rather than by model year alone. The two sizes are 165R13 in radial construction and 600-13 in bias-ply construction, and both use 13-inch rims. The radial products suit a wider listed rim range, while the bias-ply products suit a narrower listed rim range.
In practical terms, that means the correct choice depends on how the specific Sunbeam Minx is equipped and what kind of driving character you want. A car kept close to period specifications may stay on 600-13 bias-ply tires, especially when appearance matters. A car already adapted to radial driving manners should be checked for the correct wheel width before using 165R13. Looking at the wheels on the car will usually answer the question faster than relying on the year alone.
The Sunbeam Minx requires inner tubes when fitted with the listed 600-13 bias-ply tires. That size is offered only in bias-ply construction here, and the fitment guidance for this style calls for tube use. The listed 165R13 products are radial tires and are shown in tubeless-style metric sizing, so tube use is not part of that radial product description in the same way.
Tube choice should match the tire size and the wheel condition. On a restored Sunbeam Minx, especially one wearing older-style steel wheels, tube and flap details should be checked carefully during mounting rather than treated as an afterthought. If the car is moving from bias-ply to radial, the wheel itself should be inspected to make sure it is suitable for the intended construction. Tube-related decisions are best made as part of the full wheel and tire setup, not after the tires arrive.
Crossply vs Radial
Sunbeam Minx fitments in 1966 and 1967 include both bias-ply and radial choices. The bias-ply option is 600-13, while the radial option is 165R13, and both use 13-inch rims. Bias-ply tires preserve a more period-correct construction style, while radial tires reflect a later technology with a different carcass design and tread behavior. The listed wheel width ranges also differ, with the radial products suited to wider rims than the bias-ply products.
The right choice depends on how your Sunbeam Minx is used and how original you want it to remain. For restoration-minded presentation, the bias-ply size usually supports the historic look and driving feel people expect from a mid-1960s small British car. For more regular road use, a radial setup can provide a more familiar modern response, provided the wheel width matches the listed range. Construction choice should be made deliberately, because it affects both appearance and how the car behaves on the road.
Yes, radial tires can change how a Sunbeam Minx feels compared with bias-ply tires. In this fitment range, the 165R13 tires are radial and the 600-13 tires are bias-ply, so the construction difference is significant even though both fit 13-inch rims. Radials typically give a different steering response, road feel, and tread contact pattern than bias-ply tires, especially on a light vintage car.
Owners often choose radials for a Sunbeam Minx that sees regular driving because the behavior can feel more settled and predictable in ordinary road conditions. A restoration-focused car, however, may feel more authentic on its original-style bias-ply format, even if that means accepting more vintage manners. Before changing construction types, confirm that the wheel width falls within the listed range for the tire you want to use. The decision is as much about the intended personality of the car as it is about simple fitment.
A Sunbeam Minx is listed with both bias-ply and radial fitments, but that does not make mixed construction a good idea. Bias-ply 600-13 tires and radial 165R13 tires behave differently under load, steering input, and braking. Even when both fit 13-inch rims, the construction mismatch can produce inconsistent handling characteristics across the car.
The sound approach is to fit the Sunbeam Minx with a matched set of one construction type. If the car is being restored to a period presentation, keep all four tires in the bias-ply format. If the car is set up for radial road use, keep the full set radial and verify that the wheels support the listed rim width range. Consistency matters more than experimenting with mixed behavior, especially on a vintage chassis with modest weight and narrow track dimensions.
Buying the Right Tire
A 1967 Sunbeam Minx can use either 165R13 radial tires or 600-13 bias-ply tires, so the year alone does not settle the question. Both fit 13-inch rims, but the listed wheel width range differs: 4.50 to 6.00 inches for the radial size and 4.00 to 4.50 inches for the bias-ply size. The choice also reflects whether the car is being kept in a more original configuration or set up for radial road use.
Start by measuring the wheel width and checking what is already on the car. A Sunbeam Minx that still carries narrow period wheels will often point you toward the bias-ply fitment, while a car already equipped for radial use may suit the 165R13 size. Restoration records, workshop notes, and marque-club guidance can help if the car has been changed over time. The most reliable answer comes from matching the actual wheel and the car's intended use, not from the model year by itself.
Sunbeam Minx tire options here include Blackwall, Narrow Whitewall, and Wide Whitewall sidewall styles. The 165R13 radial products are offered as Blackwall tires, while the 600-13 bias-ply products are offered in Narrow Whitewall and Wide Whitewall versions. That means the visible look of the tire depends partly on which construction and size you choose, not just on personal styling preference.
For a Sunbeam Minx restoration, sidewall appearance should match the car's period presentation rather than simply the most decorative option. Blackwall often suits a more understated factory look, especially with radial-style presentation, while whitewall bias-ply tires can create a distinctly period accessory appearance. Before choosing a sidewall style, decide whether authenticity, visual impact, or regular driving manners matter most to your project. That avoids ending up with a tire that fits physically but looks out of place on the finished car.
The brands listed for Sunbeam Minx tires are Michelin, Dunlop, and BFGoodrich. Michelin and Dunlop cover the 165R13 radial fitment, while BFGoodrich covers the 600-13 bias-ply fitment. Within those brand offerings, the listed series include Michelin XAS-FF, Michelin XAS, Dunlop SP Sport Aquajet, and BFGoodrich Silvertown Classic Bias Ply.
Brand choice should follow fitment and intended use rather than lead the decision by itself. A Sunbeam Minx owner seeking a radial road tire will be choosing among Michelin and Dunlop options in the metric size, while an owner seeking a traditional bias-ply presentation will be looking at BFGoodrich in 600-13. Once the correct size and construction are settled, details such as sidewall style and wheel width range become the next useful filters. That approach keeps historical appearance and mechanical compatibility aligned.
Sunbeam Minx tires here appear in four series: Michelin XAS-FF, Michelin XAS, Dunlop SP Sport Aquajet, and BFGoodrich Silvertown Classic Bias Ply. The first three belong to the 165R13 radial fitment, while the Silvertown Classic Bias Ply belongs to the 600-13 bias-ply fitment. The biggest difference between them is construction type first, then the specific tread and brand family within the radial group.
That means a Sunbeam Minx owner should decide between radial and bias-ply before comparing series names within a category. If the goal is period-correct visual character and traditional feel, the bias-ply series is the obvious path. If the goal is a later-style radial setup for regular driving, the Michelin and Dunlop series become the meaningful comparison set. Series names matter, but only after wheel width, construction, and era-appropriate appearance are already sorted out.
Maintenance & Longevity
A Sunbeam Minx should be stored on a clean, dry surface away from direct sunlight, ozone sources, and large temperature swings. Tires on collector cars age from time, heat, and environment as much as from mileage, so long idle periods still matter. Inflation should be maintained during storage, and the car should not be left for extended periods on severely underinflated tires because that can stress the casing and create flat spotting.
If the Sunbeam Minx sits for months at a time, move it periodically or support it in a way that reduces continuous load on one contact patch. Bias-ply tires are especially prone to developing a temporary set when left in one position, and even radials benefit from careful storage habits. Keep the tires clean, avoid petroleum-based dressings, and inspect the wheel and valve area whenever the car is put back into service. Good storage is one of the easiest ways to preserve both appearance and usable life.
Tires on a Sunbeam Minx should be inspected before each drive and more thoroughly at regular intervals during the driving season. A quick check should include inflation, visible cracking, tread condition, sidewall damage, and anything unusual around the bead or valve area. Collector cars often cover very few miles, so age-related deterioration can progress without the obvious wear patterns that a daily driver would show.
A more complete inspection should happen at least seasonally, with the wheels off if possible. On a Sunbeam Minx running bias-ply tires, look closely for casing stress, irregular wear, and tube-related problems during service. On radial-equipped cars, check for aging and any mismatch in tire type or wheel width suitability. Frequent inspection matters because a low-use classic can seem fine at a glance while quietly developing issues that only become obvious under load.
Tires on a Sunbeam Minx should be replaced when age, cracking, deformation, persistent air loss, impact damage, or casing deterioration appear, even if tread depth still looks acceptable. Collector-car tires often age out before they wear out because time and environment work continuously on the rubber and internal structure. The decision should be driven by overall condition, not by tread alone, especially on a lightly used vintage car.
A Sunbeam Minx owner should think of replacement as part of preventive maintenance rather than as a last resort. If the car has sat for long periods or its service history is uncertain, a specialist inspection is wise before continued road use. Bias-ply and radial tires can both become unsafe with age, though they may show it in different ways. Replacing aging tires before visible failure protects the car, the driver, and the work invested in a carefully maintained classic.
Restoration & Authenticity
Sunbeam Minx fitments in this 1966 to 1967 range include both 600-13 bias-ply tires and 165R13 radial tires. The available product families show that the model can be approached with either a classic bias-ply setup or a radial setup in the same 13-inch wheel diameter. That reflects a period when construction technology and sizing conventions were overlapping rather than staying neatly in one camp.
For an individual Sunbeam Minx restoration, the right original-style answer depends on how that specific car was delivered and equipped. Cars restored for concours or marque-club judging should be checked against factory literature, period photography, and club expertise before the final tire choice is made. The broad fitment range is useful, but authenticity is determined by the car's own configuration. When appearance and historical accuracy matter, matching construction style can be just as important as matching the nominal size.
Yes, correct tire fitment can affect both the presentation and judged authenticity of a Sunbeam Minx. Size, construction, sidewall style, and overall stance all influence whether the car looks right for its era. A bias-ply 600-13 setup communicates something very different visually from a blackwall 165R13 radial, even though both are 13-inch fitments listed for the model.
For a Sunbeam Minx being prepared for serious restoration review, the tire decision should match the standard expected by the event or club. Some owners prioritize drivability and accept radial tires, while others aim for strict period character and select bias-ply construction and era-appropriate sidewall treatment. Judges and knowledgeable enthusiasts notice tire profile and sidewall style immediately because they shape the car's stance. Correct fitment may not make the car, but the wrong fitment can certainly distract from an otherwise careful restoration.
Sunbeam Minx tire options here include Blackwall on the 165R13 radial tires and Narrow Whitewall or Wide Whitewall on the 600-13 bias-ply tires. That means more than one visual direction is possible depending on which size and construction you choose. Sidewall style is part of the car's finished character, not merely a cosmetic detail added after fitment is settled.
A restoration-minded owner should choose the Sunbeam Minx sidewall style that matches the intended period presentation of the specific car. Blackwall often suits a cleaner, more restrained factory-style look, while whitewalls can create a distinctly period accessory appearance associated with certain market tastes. Because both narrow and wide whitewall versions are available in the bias-ply size, proportion matters as much as color. Looking at period photos of similarly equipped cars is often the best way to decide which visual treatment belongs on your build.
Safety & Road Use
Sunbeam Minx tires can be suitable for public-road use when the correct size, construction, wheel width, and overall condition are matched properly. The listed choices include both radial 165R13 tires and bias-ply 600-13 tires, so safety begins with selecting the correct construction for the wheels and intended use. A fresh, properly fitted tire in the right specification is far more important than simply choosing by appearance.
Road use also depends on the condition of the rest of the car. Steering, suspension, brakes, wheel integrity, and alignment all need to be in good order for a Sunbeam Minx to behave safely, especially if the car sees only occasional use. Bias-ply tires demand a more vintage-minded driving approach, while radials can feel more familiar to modern drivers. The tire is one part of a complete system, and a sound system matters more than any single product choice.
Before driving a Sunbeam Minx, check tire inflation, visible sidewall condition, tread condition, wheel security, and any signs of air loss or impact damage. If the car is on 600-13 bias-ply tires, it is also wise to pay close attention to tube-related issues and to any signs of irregular casing shape after storage. On 165R13 radials, confirm that the tires remain matched and that the wheels fall within the correct rim width range for the fitted size.
A short pre-drive inspection is especially important on collector cars because they often sit long enough for problems to develop between outings. A Sunbeam Minx that has been parked for weeks may need a careful walk-around before even a local drive. If anything feels unusual once underway, stop and inspect rather than trying to drive through it. Vintage cars usually give warning signs early, and paying attention to them prevents larger trouble.
A Sunbeam Minx on original-style bias-ply tires should be driven with the measured pace expected of a vintage car, even when the tires are new and correctly fitted. The 600-13 option preserves traditional construction characteristics that do not invite modern aggressive driving. A Sunbeam Minx on 165R13 radial tires may feel more settled, but it is still a mid-1960s small car with chassis, braking, and steering limitations that deserve respect.
The sensible approach is to drive the Sunbeam Minx at speeds appropriate to road conditions, tire construction, and the car's overall mechanical state rather than to chase modern traffic capability. Bias-ply cars benefit from smoother steering inputs, longer stopping margins, and conservative cornering speeds. Radial-equipped cars may tolerate ordinary road use more comfortably, but they do not turn the car into a modern machine. A well-sorted classic is enjoyable when driven within its era and engineering, not beyond them.