1973 Volkswagen Fastback Tires

The 1973 Volkswagen Fastback uses two primary tire sizes: 165R15 in radial construction and 600-15 in bias-ply construction. Both are 15-inch fitments, and the Fastback Sedan can use either size depending on the type of tire setup being maintained or selected.

That means the first decision is not wheel diameter, but which construction path matches the car and its intended use. A 165R15 keeps the Fastback in a period-appropriate radial size, while 600-15 preserves the older numeric bias-ply format. Before choosing, confirm the wheels actually on the car, especially if it has been restored, modified, or changed from its earlier tire setup.

Both primary tire sizes used on the 1973 Volkswagen Fastback mount on a 15-inch rim. That applies to the 165R15 radial fitment and the 600-15 bias-ply fitment, so rim diameter stays consistent even though the tire sizing systems and construction types differ.

Rim diameter alone does not settle the entire fitment question. The radial and bias-ply options have different rim-width ranges across the available products, so it is worth measuring the actual wheel before selecting a tire. That is especially important on a collector Volkswagen that may have replacement wheels, widened rims, or a setup changed over time for appearance or drivability.

On a 1973 Volkswagen Fastback, 600-15 is a numeric bias-ply size. The 600 portion refers to an approximate 6.00-inch nominal section width, and the 15 identifies a 15-inch rim diameter. It is part of an older sizing system that predates modern metric radial notation.

For a Fastback owner, that matters because 600-15 is not simply another way of writing 165R15. It reflects a different tire construction and a different approach to replacement fitment. Anyone moving away from 600-15 should compare the alternate size carefully for wheel-width compatibility and overall vehicle clearance rather than assuming any 15-inch radial will serve the same role.

For the 1973 Volkswagen Fastback, 600-15 is a bias-ply tire size. It uses the older numeric sizing system and appears in BFGoodrich Silvertown Classic Bias Ply options, including blackwall and wide whitewall versions for owners who want a more traditional tire presentation.

That makes 600-15 the choice to evaluate when preserving a vintage look and bias-ply construction is part of the plan. It should not be treated as the same thing as the 165R15 radial fitment, even though both use 15-inch rims. Wheel width, road-use expectations, and the overall appearance goal should all be considered before switching between the two construction types.

Radial equivalents for 600-15 on a 1973 Volkswagen Fastback include 165R15 as the 80-series metric radial, P165/75R15 as the P-metric 75-series radial, and P175/70R15 as the P-metric 70-series radial. No bias-look radial equivalent is available in this fitment path.

Those alternatives give the owner several ways to move from a bias-ply size into radial construction, but they should be treated as comparison points rather than automatic replacements. A recommended rim-width range of 4 to 5 inches applies to this equivalency set, and final selection should account for wheel width, overall tire dimensions, steering clearance, and any changes the car may have undergone over the years.

Start by confirming the exact tire size being replaced and the actual wheel width on the car. A 1973 Volkswagen Fastback using 600-15 bias-ply tires has radial-equivalent paths such as 165R15, P165/75R15, and P175/70R15, but each option needs to be matched to the wheel and vehicle setup rather than chosen by rim diameter alone.

Conversion decisions should also include a close look at front and rear clearance, steering sweep, suspension condition, and the way the car will be driven. A collector Fastback with original-style wheels may call for a different choice than one with later wheel changes. Checking those details first helps avoid selecting a radial that changes fitment behavior more than expected.

A 165R15 tire for a 1973 Volkswagen Fastback should be chosen first by confirming that the car is staying with the radial fitment path and that the wheel width suits the product being considered. In this size, options vary by brand, sidewall treatment, tire series, and rim-width specification rather than by basic fitment alone.

Practical comparison points include whether the car needs a blackwall, narrow whitewall, or wide whitewall appearance, along with how closely the wheel matches the listed rim-width range. Load capacity and product weight can also matter when comparing otherwise similar tires. The best choice depends on whether the goal is restoration-oriented style, everyday road use, or a more European period-style presentation.

The 1973 Volkswagen Fastback has meaningful sidewall variety across its available tire choices. In 165R15 radial form, blackwall, narrow whitewall, and wide whitewall options are available. In 600-15 bias-ply form, blackwall and wide whitewall choices are offered, giving owners room to shape the car’s presentation without changing wheel diameter.

Sidewall style is often one of the biggest visual decisions on a Fastback because it changes the car’s character at a glance. A blackwall usually gives the cleanest, most understated appearance, while whitewall treatments push the car toward a more restoration-oriented look. Since sidewall style does not override fitment requirements, keep size, construction, and wheel compatibility ahead of appearance when narrowing the options.

Tires for the 1973 Volkswagen Fastback are available from Coker Classic, American Classic, Firestone, BFGoodrich, Michelin, and Vredestein. Most of that variety appears in the 165R15 radial size, while the 600-15 bias-ply size is represented by BFGoodrich Silvertown Classic Bias Ply options.

Brand choice matters mainly because it often overlaps with differences in tire series, sidewall styling, and rim-width specifications. Some Fastback owners may want a plain blackwall radial, while others may be looking for a whitewall presentation or a more traditional bias-ply route. Comparing the complete tire specification is more useful than picking only by brand name.

A period-style 1973 Volkswagen Fastback can be approached in two main ways: a 600-15 bias-ply for a more traditional vintage presentation or a 165R15 radial for a period-appropriate European radial look. Both are authentic to the era in character, but they create noticeably different visual and driving impressions.

The better choice depends on what kind of restoration story the car is telling. A bias-ply setup leans more heavily into older construction and appearance, while a 165R15 radial keeps the car in a classic metric radial format with broader sidewall and brand selection. When exact originality matters, marque-specific reference material and vehicle history should guide the final call.

Tire construction changes more than the driving feel on a restored 1973 Volkswagen Fastback; it also changes the car’s visual character. A 600-15 bias-ply gives the Fastback a more traditional vintage stance, while a 165R15 radial presents the car in a later, more European radial style that still suits the model well.

Sidewall treatment adds another layer to that decision. Blackwalls keep the look restrained, while narrow or wide whitewalls shift the car toward a more dressed appearance. Because appearance preferences vary widely among restorations, the safest approach is to choose the construction first, then select the sidewall style that matches the way the Fastback is being restored and displayed.

Yes, modifications can affect tire fitment on a 1973 Volkswagen Fastback even when the tire size itself is appropriate. Changes such as aftermarket wheels, altered wheel width, suspension lowering, or body and fender work can all influence how a 165R15 or 600-15 tire sits and clears the car.

That is why a modified Fastback should be checked as an individual setup rather than judged by original size alone. Wheel width is especially important because available products within these sizes do not all share the same approved rim range. Looking at steering clearance, rear clearance, and how the tire sits under load can prevent surprises after installation.

Before driving a 1973 Volkswagen Fastback on new tires, inspect wheel condition, lug hardware, valve stems, and inflation pressure, then make sure the tires clear the body and steering components through their full range of movement. It also helps to confirm that all four tires match the intended size and construction choice.

A short initial road test is worthwhile on a collector Volkswagen because it can reveal rubbing, vibration, or pressure loss before the car is used more seriously. After those first miles, recheck pressure and take another look at clearance marks around the wheel openings and suspension. Catching small issues early is especially important on older cars that may not have perfectly original wheel or suspension parts.

Collector-car tires on a 1973 Volkswagen Fastback should be maintained with regular pressure checks, visual inspection, and careful storage habits. Whether the car wears 165R15 radials or 600-15 bias-ply tires, owners should watch for cracking, bulges, cuts, unusual tread wear, and slow air loss, especially if the car spends long periods parked.

Storage conditions matter almost as much as mileage on a low-use Fastback. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps preserve the rubber, while periodic movement can help prevent long-term flat spotting. Tires should also be inspected before longer drives rather than assumed to be road-ready simply because the tread still looks deep.