1970 Sunbeam Tire Fitment Guide

1970 Sunbeam vehicles use two tire sizes across the model range: 165R13 and 600-13. Both the 1970 Sunbeam Alpine and 1970 Sunbeam Arrow use both sizes, and both sizes mount on 13-inch rims. For rim width, 165R13 products are built for 4.50 to 6.00 inch rims, while 600-13 products are built for 4.00 to 4.50 inch rims.

That means year and make alone are not enough to finish the decision, because both sizes are possible on a 1970 Sunbeam. The practical next step is choosing the kind of tire you want the car to wear: radial for a more modern driving character or bias-ply for a more period-style look and feel. After that, verify the actual wheel width on the car so the size matches the wheel correctly.

On a 1970 Sunbeam, 600-13 is a numeric bias-ply size. The 600 portion is the nominal section width in the older numeric system, and the 13 is the wheel diameter in inches. In the products available for this size, 600-13 comes as a bias-ply tire with whitewall styling choices rather than as a modern metric radial.

That makes 600-13 the size many owners consider when they want a stronger vintage look on a 1970 Sunbeam. It also uses a narrower rim width range than the radial alternative, so wheel width matters before you commit. If the car is being restored with period presentation in mind, this is the size to examine first along with the whitewall width that best suits the car's finished appearance.

On a 1970 Sunbeam, 165R13 is a metric radial size. The 165 is the nominal section width in millimeters, the R indicates radial construction, and the 13 is the wheel diameter in inches. In this older metric style, the aspect ratio is not printed, and that format conventionally points to an 80-series profile.

For many drivers, 165R13 is the easier size to recognize because it follows the radial sizing language that became common in later decades. It is the right place to look if your 1970 Sunbeam is driven regularly and you want a tire built around radial construction. Even so, confirm wheel width before ordering, because the radial products in this size call for a different rim width range than the 600-13 bias-ply option.

For a 1970 Sunbeam, the choice between 165R13 and 600-13 is mainly a choice between radial and bias-ply construction rather than a question of one model using one size and another model using the other. The 165R13 is the radial option, while the 600-13 is the bias-ply option. Both fit the Alpine and Arrow and both use a 13-inch rim diameter.

Owners who want a more period-style presentation often lean toward 600-13, especially with whitewall styling. Owners who plan to spend more time on contemporary roads often start with 165R13 because radial construction better matches that use. The important thing is to pair the tire with your restoration goal and then verify the wheel width, since the rim width range is not the same between the two sizes.

1970 Sunbeam tires are available in several sidewall styles depending on size. The 165R13 radial choices are blackwall, while the 600-13 bias-ply choices are available as narrow whitewall and wide whitewall. That gives Sunbeam owners a clear visual split between the radial size and the bias-ply size.

Sidewall appearance can change the personality of a small British car almost as much as the wheel itself. Blackwalls usually suit a cleaner sporting look, while whitewalls push the car toward a more stylized period presentation. If originality matters for your particular 1970 Sunbeam, compare the finished look against period photos, club resources, and the way your car will actually be judged or displayed.

Three brands cover 1970 Sunbeam fitments across the two sizes used by the Alpine and Arrow. The 165R13 radial is available from Michelin and Dunlop, and the 600-13 bias-ply is available from BFGoodrich. Within those choices, Michelin appears in both XAS and XAS-FF form, Dunlop offers the SP Sport Aquajet, and BFGoodrich covers the bias-ply option.

That brand spread gives you a useful way to narrow the search. If you want a radial with a distinctly European flavor, 165R13 is where Michelin and Dunlop come into play. If your priority is a vintage-style bias-ply presentation with whitewall options, BFGoodrich is the natural starting point. The best choice comes from matching brand, construction, and sidewall look to the character you want your 1970 Sunbeam to project.

Rim width depends on the tire size you choose for a 1970 Sunbeam. For 165R13, the approved rim width range is 4.50 to 6.00 inches. For 600-13, the approved rim width range is 4.00 to 4.50 inches. Both sizes share a 13-inch rim diameter, but they do not share the same width range.

That is why wheel width should be confirmed before ordering, especially on a car that may have changed wheels at some point in its life. A 13-inch diameter alone does not settle the question. Measure the actual wheel or confirm the stampings if possible, then choose the tire that falls within the proper range for that rim. That avoids forcing a size onto a wheel it was not meant to use.

Tube use on a 1970 Sunbeam depends on the tire and the wheel combination. The Michelin 165R13 products are marked TL, which means tubeless. The other products shown here do not all carry the same explicit tube marking, so tube fitment should be treated as something to confirm by product and by wheel condition rather than assumed across the whole year and make.

The wheel itself matters just as much as the tire marking, especially on an older British car that may still have original rims or may have been restored with replacements. If the wheel was designed for tube-type service, or if rim condition is questionable, that can change the setup. Confirm the sidewall marking on the exact tire and inspect the wheel carefully before final installation.

Original 1970 Sunbeam wheels can often accept either tire size in terms of diameter because both 165R13 and 600-13 fit 13-inch rims. The width requirement is where the decision becomes more specific. The radial 165R13 wants a 4.50 to 6.00 inch rim, while the bias-ply 600-13 fits a 4.00 to 4.50 inch rim.

That means some original wheels may work with both sizes, but only if the actual rim width falls within the approved range for the tire you want to use. On a restored car, the safest approach is to verify the wheel before assuming interchangeability. Diameter compatibility is straightforward here; width compatibility is the part that needs confirmation.

A 1970 Sunbeam should be stored in a cool, dry, dark space away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment. Keep the tires clean, maintain proper inflation, and move the car periodically so one section of the casing does not sit under load for months at a time. Bias-ply tires are especially prone to temporary flat-spotting during long static storage, while radials generally recover more quickly.

If the car will sit for an extended period, many collectors either roll it occasionally or support it in a way that reduces constant load on the tires. That matters on a lightweight British car because long storage can still age the rubber even when tread wear is minimal. Good storage habits preserve appearance, reduce stress cracking, and help the car drive more predictably when it returns to the road.

Tires on a 1970 Sunbeam should be judged more by age and condition than by miles traveled. A collector car tire often deserves close evaluation once it reaches about five to seven years of age, and replacement becomes a serious consideration as it approaches ten years, even if the tread still looks deep. The DOT date code and the tire's overall condition matter more than the odometer on a lightly used classic.

That age-based approach is especially important for cars that spend more time parked than driven. Rubber hardens, sidewalls can crack, and internal structure ages long before the tread is worn out. If your 1970 Sunbeam still wears older tires from a previous restoration, inspect them with age in mind rather than assuming low mileage means they are still ready for regular road use.

Tires on a 1970 Sunbeam should be inspected before every drive and given a more thorough look before any longer outing. Check inflation, sidewall cracking, cuts, bulges, uneven wear, and any signs that the tire has been rubbing or losing air. If your setup uses tubes or older wheels, pay close attention to valve stems and slow pressure loss as well.

Frequent inspection matters because a collector car can go from sitting quietly in the garage to sustained road speed in a single afternoon. A quick visual check catches aging issues that are easy to miss when the car is not driven daily. Make the spare part of the routine too, since a roadworthy spare is especially valuable on an older British car driven away from home.

A 1970 Sunbeam Alpine would have been associated with bias-ply tire practice historically, although radial adoption was becoming increasingly common in European cars by that period. For this year and make, both 600-13 bias-ply and 165R13 radial options exist, which reflects the overlap between original-era construction and later driving preferences. No specific original equipment brand should be assumed without checking period literature for the exact market and trim.

If your goal is authenticity, start by deciding whether you are restoring the car to a showroom-era look or preparing it for regular road use with a more modern feel. Then compare your car against factory brochures, road tests, and Sunbeam club guidance. Marque specialists are especially helpful when a British car may have varied by export market, dealer practice, or restoration history over the decades.

Correct tire fitment absolutely matters when a 1970 Sunbeam is judged for authenticity. Judges and knowledgeable enthusiasts often notice size, construction type, and sidewall appearance very quickly, because those details have a strong visual effect on stance and period correctness. A radial blackwall and a bias-ply whitewall can give the same car very different presentation, even if both mount on 13-inch rims.

What counts as correct depends on the event and the standard being used. A local casual show may reward overall appearance, while marque judging may be far stricter about construction and sidewall style. Before finalizing the tire choice, review the standards for the event where the car will appear and compare notes with Sunbeam club members who know what typically draws attention in judging.

For a 1970 Sunbeam in 165R13, Michelin offers both XAS and XAS-FF versions. Both are blackwall radial tires in the same 165HR13 82H size, and both fit 13-inch rims with a 4.50 to 6.00 inch rim width range. The most obvious specification difference here is weight, with the XAS-FF shown at 20 pounds and the XAS shown at 9 pounds.

Because the basic size, speed rating, construction, and rim fitment align, the choice comes down to which Michelin series best fits your restoration goal and your preference within that family. For many Sunbeam owners, this is less about fitment and more about selecting the product character they want while staying in the same radial size. It is worth comparing each tire's sidewall details and overall presentation before deciding.

1970 Sunbeam tires can be suitable for highway driving when they are in good condition, correctly fitted, and used within their construction and speed limits. The 165R13 radial products here carry H ratings, which correspond to a 130 mph ceiling. The 600-13 bias-ply products do not show a speed rating in the same modern format, so they should be treated with the more conservative mindset normally applied to vintage-style bias-ply tires.

On a car like a 1970 Sunbeam, the tire is only one part of the roadworthiness picture. Brakes, steering, suspension, alignment, wheel condition, and the car's overall mechanical health often matter just as much as the tire's theoretical speed capability. For regular highway use, many owners prefer the radial option, but whichever size you choose, condition and proper setup come first.

Inflation pressure on a 1970 Sunbeam should follow the vehicle's factory recommendation first, with the tire manufacturer's maximum load-and-pressure figure used only as the upper limit for that tire, not as the default running pressure. In 600-13, the available bias-ply tires show a maximum load of 1010 pounds at 32 psi. In 165R13, one radial product shows a maximum load capacity of 1,047 pounds, but that does not replace the carmaker's operating-pressure guidance.

The practical rule is simple: do not transfer a pressure number from one size to the other, and do not inflate to the sidewall maximum unless that is specifically appropriate for the application. A light British car can feel noticeably different with only a small pressure change. Use the owner's manual or period service literature as your baseline, then fine-tune within the tire maker's limits if needed.

Before taking a 1970 Sunbeam on a longer drive, inspect each tire for cracking, cuts, bulges, tread separation, uneven wear, and proper inflation. Check valve stems, confirm lug tightness, and make sure the spare is usable and inflated. If the car has older wheels or a setup that may involve tubes, pay extra attention to slow leaks and the condition of the wheel itself.

A longer trip in a classic British car should always include a broader mechanical check as well, because tires work together with the rest of the chassis. Steering play, brake feel, wheel bearing condition, and alignment all influence how the car behaves on the road. A thorough pre-drive routine makes the trip more enjoyable and reduces the chance that a small age-related issue turns into a roadside problem.