1955 BMW Tire Fitment Guide

1955 BMW vehicles use five sizes across four models. The 1955 BMW 501 uses 550-16, 185R15, and 640-15; the 1955 BMW 502 uses 185R15 and 640-15; the 1955 BMW 503 uses 185R15 and 640-15; and the 1955 BMW 507 uses 175R16 and 600-16. The 15-inch group centers on 185R15 and 640-15, while the 16-inch group centers on 550-16, 175R16, and 600-16. Rim-width guidance appears on several available products, including 3.25 to 4.00 inches for 550-16, roughly 4.5 to 6.5 inches for 185R15 products, 4.00 to 5.00 inches for 640-15 products, and 4.00 to 4.50 inches for 600-16 products.

That means a 1955 BMW buyer should identify the exact model before choosing a tire size, especially because the 501 spans both 15-inch and 16-inch fitments and the 507 does not share its sizes with the sedan and coupe range. Once the model is confirmed, the next step is matching the tire to the actual wheel diameter on the car and then deciding whether a bias-ply or radial construction makes more sense for how the BMW will be driven and presented.

On a 1955 BMW, 640-15 is a numeric bias-ply tire size. The 6.40 figure identifies the nominal section width in inches, and the 15 identifies the wheel diameter in inches. Within the 1955 BMW range, 640-15 applies to the 501, 502, and 503, all of which are 15-inch-wheel cars in this fitment group. Available versions appear from BFGoodrich and Firestone, primarily with whitewall styling.

Numeric bias-ply sizing is typical of the era, so the code looks different from later radial markings even when both sizes can serve the same general model family. For a 1955 BMW owner, 640-15 usually points toward a more traditional restoration-style presentation, especially where sidewall appearance matters. It is still important to confirm the actual wheel on the car, because the 507 uses 16-inch sizes and the 501 can appear with either wheel diameter depending on the fitment being followed.

On a 1955 BMW, 185R15 is a Euro-metric radial size. The 185 identifies section width in millimeters, the R marks radial construction, and the 15 is the wheel diameter in inches. When no aspect ratio is written into this style of size, it is conventionally treated as an 80-series radial. In the 1955 BMW lineup, 185R15 applies to the 501, 502, and 503.

That code matters because it separates a later-style radial format from the earlier numeric bias-ply sizes used elsewhere in the same year. A 1955 BMW owner comparing 185R15 against 640-15 is not only comparing numbers but also comparing construction types, sidewall styles, and available speed ratings within the radial offerings. Check the full sidewall marking on the exact tire you are considering, since Michelin versions in this size include H- and V-rated products rather than one single specification for every 185R15.

For a 1955 BMW 501, 502, or 503, the choice between 185R15 and 640-15 is mainly a choice between radial and bias-ply construction. The 185R15 size is a radial fitment offered in styles such as blackwall, narrow whitewall, and redline, while 640-15 is a bias-ply fitment offered in wide and narrow whitewall versions. Both are 15-inch sizes, but they represent different construction eras and a different ownership philosophy.

Owners aiming for a more historically traditional look often gravitate toward the numeric bias-ply size, especially on a restoration where sidewall presentation matters. Owners planning more frequent road use often prefer the radial route because it reflects the later construction style available in this same fitment family. The right answer depends less on the badge on the trunk than on whether your 1955 BMW is being prepared for show-field authenticity, touring, or a mix of both.

1955 BMW tires are available in several sidewall styles depending on the size. The 550-16 size appears in blackwall and wide whitewall, 185R15 appears in redline, narrow whitewall, and blackwall, 640-15 appears in wide whitewall and narrow whitewall, and 600-16 appears in blackwall and wide whitewall. Those options give the 1955 BMW range a wider visual spread than many year-make pages, especially because the lineup crosses luxury sedans, a grand touring model, and the 507 roadster.

A sidewall choice should support the character of the car and the type of restoration you are after. Wide whitewalls are often associated with period American luxury styling and can strongly influence the look of a formal sedan, while blackwalls usually read more restrained and sporting. Redline on 185R15 is a very specific visual statement, so it is worth considering whether that treatment suits your exact 1955 BMW model and the presentation standards you want to follow.

Several brands cover the 1955 BMW range, but they do so by size rather than as one universal catalog. The 550-16 size includes Excelsior, Avon, BFGoodrich, and Firestone; 185R15 includes Coker Classic and Michelin; 640-15 includes BFGoodrich and Firestone; and 600-16 includes BFGoodrich, Coker Classic, Avon, and Firestone. That spread means brand choice depends first on identifying the correct size for your BMW model.

Once the size is settled, the brand decision becomes more about construction type, sidewall style, and the exact specification of the tire than about the make of the car itself. Michelin's 185R15 options, for example, bring different speed-rated radial choices, while the bias-ply sizes offer classic-brand presentation with whitewall and blackwall alternatives. Looking at the car's intended use before narrowing by brand usually produces a better result than starting with brand loyalty alone.

Rim-width guidance for 1955 BMW tires varies by size. The 550-16 products shown fit 3.25- to 4.00-inch rims, 185R15 products span ranges from 4.5 to 6 inches and 5.00 to 6.50 inches depending on the product, 640-15 products span 4.00 to 4.50 inches or 4.50 to 5.00 inches, and 600-16 products shown fit 4.00- to 4.50-inch rims. Those ranges are tied to the specific tire size and, in some cases, to the specific product within that size.

A 1955 BMW owner should compare the wheel actually on the car to the acceptable range for the exact tire being considered, not just the generic size. That matters most on cars with replacement wheels, mixed restoration histories, or a model like the 501 that appears with more than one wheel diameter in the available fitments. Confirming rim width before purchase avoids forcing a tire onto a wheel that falls outside the maker's intended range.

Tube requirements on 1955 BMW tires depend on the exact size and product. The Michelin 185R15 radial products shown are marked TL, indicating tubeless construction, while several bias-ply listings such as 550-16, 640-15, and 600-16 do not carry a TL marking in the size line. That does not mean every tire in those sizes should be treated the same way without checking the exact product and the wheel it will mount on.

The practical rule is to verify both the tire's sidewall marking and the wheel design before installation. Original collector-car wheels may have conditions or rim profiles that influence whether a tubeless tire can be used as intended, and a restoration may include wheels that are no longer in original condition. Treat the tire's own marking as the first reference point, then confirm compatibility with the wheel and with the installer handling your 1955 BMW.

A stored 1955 BMW should be kept out of direct sunlight, away from electric motors and other ozone sources, and on a clean, dry surface where moisture cannot sit against the tire. Tire pressures should be maintained during storage, and the car should either be rolled periodically or supported in a way that reduces long-term static loading. Bias-ply tires such as 550-16, 640-15, and 600-16 are generally more prone to temporary flat-spotting during long idle periods than radial constructions like 185R15 and 175R16.

Good storage habits matter because collector cars often age tires by time and environment more than by mileage. A 1955 BMW that spends months sitting can develop sidewall aging and shape memory even if the tread still looks fresh. Keeping the car cool, shaded, and slightly exercised helps preserve ride quality and appearance, especially if you are maintaining a period-style bias-ply setup for show or occasional fair-weather driving.

Tires on a 1955 BMW should be judged primarily by age and condition rather than miles traveled. Collector-car tires are commonly evaluated closely once they reach the five- to seven-year range, and around ten years is a reasonable point for serious replacement consideration even when tread depth still looks acceptable. The DOT date code on the tire is the best way to establish age if the tire carries one, and visible cracking, hardness, or structural change can move replacement higher on the priority list.

That age-based approach is especially important on cars like a 1955 BMW because many spend long periods parked between drives and can appear better than they really are. A lightly used car is not automatically on healthy tires. If the BMW is driven infrequently, inspected carefully, and kept in good storage, the tires may age gracefully, but age still matters more than odometer readings when deciding whether they are ready for continued road use.

A 1955 BMW's tires should be inspected before every drive and again before any extended outing. Look for sidewall cracking, cuts, bulges, uneven wear, embedded debris, and any sign that the tire is no longer holding pressure consistently. On cars using tube-type-oriented vintage constructions or older wheel setups, it is also wise to look closely at valve stems and any evidence of slow leakage around the rim area.

Frequent inspection is not overcautious on a collector BMW; it is normal ownership practice. Cars that sit for weeks can change more between drives than a regularly used modern car changes in a month. A quick walkaround catches the problems most likely to spoil a drive, while a deeper seasonal inspection gives you time to address age, cracking, or inflation issues before they become roadside problems.

For a 1955 BMW 501, the era points firmly toward bias-ply as the original-style construction, which aligns with the 550-16 and 640-15 sizes offered in the 1955 BMW range. The 185R15 size introduces a radial alternative for the same model family, but a mid-1950s BMW sedan would generally be associated with period bias-ply practice unless a later service replacement path is being followed. Original fitment details can still vary by market, body style, and restoration history.

For show or historically faithful restoration work, the safer starting point is to treat the bias-ply sizes as the authenticity benchmark and then verify your exact car's wheel diameter and market background. The 501 is unusual here because it appears with both 15-inch and 16-inch options, so wheel confirmation matters before ordering. Marque clubs, factory literature, and model specialists are the best places to settle final originality questions on an individual 1955 BMW 501.

Correct tire fitment matters on a 1955 BMW because judges and knowledgeable enthusiasts often notice three things quickly: size, construction type, and sidewall appearance. A car presented as an authenticity-focused restoration can be marked down informally or formally if it wears a visibly modern radial where a bias-ply look is expected, or if the sidewall treatment clashes with the car's period character. Wheel diameter mismatches are even more obvious because they affect stance and proportion.

That does not mean every shown 1955 BMW must wear the same tire, but it does mean the tire should support the story the car is telling. A touring-oriented restoration can justify a radial more easily than a concours-focused one, while a formal sedan may call for a different visual treatment than a 507 roadster. Event standards vary, so if a specific show result matters, confirm the judging expectations before finalizing tire construction and sidewall style.

For a 1955 BMW in 185R15, Michelin XVS and Coker Classic Radial differ in sidewall presentation, speed rating, and rim-width listings. The Coker Classic radial shown appears as a redline with a 1355-lb maximum load at 35 psi and a 5.00- to 6.50-inch rim-width range. Michelin XVS appears in blackwall and narrow whitewall form, with H-rated versions capped at 130 mph and a V-rated version capped at 149 mph; Michelin rim-width listings shown range from 4.5 to 6 inches and 5.00 to 6.50 inches.

That makes the choice less about which tire is universally right and more about what presentation and specification suit your 1955 BMW. The Coker option stands out visually because of the redline treatment, while the Michelin choices offer a more restrained European look and multiple speed-rated variants. Before choosing between them, confirm the wheel width on the car and decide whether sidewall appearance or the exact radial specification is the stronger priority.

1955 BMW tires can be suitable for highway driving when the size, construction, condition, and speed rating all match the intended use. Among the sizes shown here, 185R15 includes H-rated products capped at 130 mph and a V-rated product capped at 149 mph, while one 600-16 product carries an H rating capped at 130 mph. Other bias-ply products do not always display a speed letter in the listed size line, so they should be treated according to the exact tire's own marking and intended vintage use.

On a 1955 BMW, tire condition is only part of highway readiness. Brakes, steering, suspension, alignment, and the general character of a mid-century car often set the practical comfort limit before the tire does. A sound, properly fitted tire is essential, but a collector BMW should still be driven with respect for the mechanical realities of its era, especially if it remains on bias-ply construction.

Inflation pressure on 1955 BMW tires should be matched to the exact tire size and product rather than borrowed from another size in the lineup. Listed examples include 550-16 at 840 lbs at 32 psi on one Firestone product, 185R15 at 1355 lbs at 35 psi on the Coker Classic radial, 640-15 at 1190 lbs at 32 psi on several products and 970 lbs at 32 psi on one narrow-whitewall version, and 600-16 at 1400 lbs at 32 psi on several products. Those figures describe the tire's rating point, not necessarily the carmaker's recommended operating pressure.

The best practice is to start with the original BMW owner's guidance for the vehicle, then compare it with the reproduction or replacement tire manufacturer's specifications for the exact tire you are fitting. A 1955 BMW 507 on 600-16 should not automatically inherit a pressure assumption from a 501 on 550-16, and a radial 185R15 should not be inflated by bias-ply habit alone. Keep the pressure matched to the tire and the car together.

Before a longer drive in a 1955 BMW, inspect each tire for cracking, tread separation signs, bulges, cuts, punctures, and uneven wear, then confirm cold inflation pressures and make sure the spare is roadworthy. If the car uses an older-style bias-ply setup or wheels that may require tube-sensitive attention, include valve stems and any slow-loss history in the pre-drive review. Wheel hardware and basic alignment condition also deserve attention because wandering or vibration can quickly turn a pleasant classic drive into a stressful one.

A tire check should be part of a wider mechanical once-over on a car of this age. Fluids, brakes, steering play, cooling, and charging system health can matter just as much as tread depth on a mid-1950s BMW. The goal is not to overprepare but to eliminate the obvious weak links before they become trip-ending problems, especially on cars that see only occasional use between drives.