1978 Peugeot 604 Tires

A 1978 Peugeot 604 uses two primary tire sizes: 175R14 and 185R14. Both are radial tires designed for 14-inch wheels, and the 1978 Peugeot 604 SL (Gas) can use either size rather than being tied to one single fitment.

That makes wheel confirmation especially important before ordering tires. Check the size already fitted to the car, confirm the wheel diameter is 14 inches, and compare the wheel width against the tire you are considering. Once the correct size is confirmed, the remaining choice usually comes down to brand, tire series, and whether a blackwall or narrow whitewall better matches the car’s appearance.

The 1978 Peugeot 604 uses a 14-inch rim diameter with both of its primary tire sizes, 175R14 and 185R14. Even though two tire widths are used, they share the same 14-inch wheel diameter, so the basic rim size stays consistent.

Rim diameter is only part of the fitment picture, though. Wheel width still matters, especially because some available tires in these sizes carry different rim-width ranges. Measuring the actual wheels on the car is worthwhile if they may have been changed over the years, since the right 14-inch tire still needs a compatible wheel width and adequate clearance in normal driving and steering conditions.

On a 1978 Peugeot 604, 175R14 is a Euro-metric radial size. The 175 refers to nominal section width in millimeters, the R identifies radial construction, and the 14 indicates the tire fits a 14-inch wheel.

That size format differs from older numeric bias-ply markings, so it can look unfamiliar to buyers used to American classic tire codes. On the Peugeot 604, 175R14 represents one of the correct primary fitments, but it should still be matched to the actual wheel setup on the car. Verifying the wheel width and comparing the size already installed helps keep the replacement choice aligned with the car’s existing fitment.

Start by making sure 175R14 is the size currently suited to your 1978 Peugeot 604, since this model can also use 185R14. In 175R14, available choices include Michelin XAS, Vredestein Sprint Plus, and Vredestein Sprint Classic, all in blackwall form and all built as radial tires.

Once the size is confirmed, compare the tire’s intended character and wheel compatibility. Some 175R14 options include stated rim-width ranges such as 4.5 to 6.0 inches, and product weights also vary. For a restoration-oriented sedan like the 604, the practical decision often comes down to whether you want a more traditional European touring look, a particular series name, or a tire whose specifications best suit the wheels already on the car.

The 1978 Peugeot 604 is available with both blackwall and narrow whitewall tire choices, depending on size and product line. Blackwall options appear in both 175R14 and 185R14, while narrow whitewall options appear in 185R14.

That sidewall difference changes the car’s presentation more than its fitment category, since both sizes remain proper radial 14-inch choices. A blackwall generally preserves a more understated European look, while a narrow whitewall adds a more formal visual accent. The right choice depends on how the car is being presented, but the sidewall style should always come after confirming the tire size and wheel compatibility.

Michelin, Vredestein, and Phoenix all offer tires for the 1978 Peugeot 604 within its supported 14-inch radial sizes. Michelin appears in both 175R14 and 185R14 fitments, Vredestein covers both sizes as well, and Phoenix appears in 185R14 narrow whitewall form.

Brand choice is only one part of the decision. It helps to compare the specific tire series, sidewall treatment, and any stated rim-width or load details rather than choosing by brand name alone. Because the Peugeot can use either 175R14 or 185R14, confirm the actual size and wheel on the car first, then compare which brand’s available product best matches the look and use you want.

A period-style 1978 Peugeot 604 tire choice starts with using one of the car’s correct radial 14-inch sizes, either 175R14 or 185R14. Within those sizes, European-oriented tire lines such as Michelin XAS, Michelin MXV, and Vredestein Sprint Classic help maintain the kind of traditional presentation many owners want.

The appearance decision then shifts to profile and sidewall treatment rather than construction, since both primary sizes are radial. Blackwall choices usually suit the 604’s understated sedan character, while a narrow whitewall can create a more formal look. If exact originality matters, compare your car against marque references or period documentation before choosing a particular series or sidewall style simply for appearance.

Correct tire fitment matters on a 1978 Peugeot 604 restoration because the tire has a strong effect on stance, wheel fill, and the overall character of the finished car. Using one of the proper 14-inch radial sizes, 175R14 or 185R14, keeps the restoration grounded in the car’s authentic fitment range.

A restoration can look noticeably different when width, sidewall style, or tire series shifts away from that original fitment family. Even when the car is not being restored to exact judging standards, staying within the proper size range helps preserve the Peugeot’s intended proportions. That is why the best first step is confirming the wheel setup, then choosing the tire appearance that matches your restoration goals.

Yes, modifications can affect tire fitment on a 1978 Peugeot 604 even when the tire size itself is correct. If the car has aftermarket wheels, suspension changes, altered ride height, or bodywork differences, 175R14 and 185R14 can each behave differently than they would on a stock wheel and suspension setup.

That is why the tire size on paper should not be the only check. Measure the actual wheel diameter and width, and inspect clearance at the fender, suspension, and steering range before changing sizes or replacing old tires. A modified 604 may still use one of the proper radial sizes, but the real-world fit depends on how the car is currently configured.

Before driving a 1978 Peugeot 604 on new tires, inspect the wheels for damage, confirm the tire size matches the wheel setup, and make sure each tire is inflated properly for the application. It is also wise to check for obvious suspension or steering wear that could affect how the new radials track on the road.

A collector-era sedan that has spent time parked also deserves a closer look at the rest of the running gear. Verify lug hardware condition, inspect for rubbing at full steering lock, and make sure the old tires did not hide alignment or clearance issues. New tires can only perform as intended when the wheels, front-end components, and basic chassis condition are all in sound order.

Maintain 175R14 or 185R14 tires on a collector 1978 Peugeot 604 by checking pressure regularly, watching for uneven wear, and inspecting the sidewalls for cracking, cuts, or bulges. Because many collector cars are driven infrequently, tire condition matters just as much as tread depth.

Storage habits also play a big role in tire life. Keep the car away from prolonged sunlight, excess heat, moisture, and ozone-producing equipment, and move or drive it occasionally so the tires do not sit in one position for long periods. Regular inspection before road use is especially important on a low-mileage 604, where age and storage can matter more than annual miles driven.