1978 Mazda RX-4 Tires

The 1978 Mazda RX-4 uses two primary radial tire sizes: 195/70R13 and BR70-13. Both sizes are associated with the model, and both are built for a 13-inch wheel. The Sedan & Coupe and the Wagon share those same size options, so fitment does not split into different tire sizes by sub-model in this case.

The practical decision is choosing which sizing format better suits the car and its intended use. A 195/70R13 gives a modern metric radial presentation, while BR70-13 carries a more vintage alphanumeric radial look. Before choosing either one, confirm the actual wheel diameter and wheel width on the vehicle, especially if the RX-4 has seen aftermarket changes over the years.

The 1978 Mazda RX-4 uses a 13-inch rim with its primary tire fitments. Both 195/70R13 and BR70-13 are tied to that same wheel diameter, so the key wheel measurement begins with confirming that the car still has a 13-inch rim in place. That applies across the Sedan, Coupe, and Wagon configurations covered here.

Wheel diameter is only part of the fitment picture, especially on an older car. Rim width also matters, and the available 195/70R13 product shown here fits a 5.00- to 6.50-inch rim-width range. If the RX-4 has replacement wheels, measure both diameter and width before ordering tires so the chosen size and construction match the wheel as well as the vehicle.

Yes. The 1978 Mazda RX-4 Sedan & Coupe and the 1978 Mazda RX-4 Wagon both use the same two radial size options: 195/70R13 and BR70-13. That means tire fitment stays consistent across the covered sub-models rather than requiring a different size for the wagon versus the passenger-car body styles.

Even with shared fitment, it still helps to verify what is currently on the car. A surviving RX-4 may have replacement wheels, altered ride height, or a previous owner’s tire choice that does not reflect the original wheel setup. Matching the tire to the actual wheel dimensions and the desired appearance is more useful than assuming every car still carries its original configuration.

Start with the basics: confirm that 195/70R13 matches the wheel diameter and wheel width on the car, then look at the tire’s construction, sidewall style, and overall presentation. For the 1978 Mazda RX-4, 195/70R13 is a radial option that gives the car a modern metric size designation while staying in the correct 13-inch format.

Selection becomes more specific once the fitment is confirmed. The available BFGoodrich Silvertown Radial in this size uses a narrow whitewall, which can influence the car’s overall look as much as the size itself. Owners choosing for regular road use, restoration-minded appearance, or a blend of both should compare sidewall treatment and wheel-width compatibility before making the final decision.

A narrow whitewall sidewall style is available in 195/70R13 for the 1978 Mazda RX-4. That treatment appears on the BFGoodrich Silvertown Radial and gives the car a more traditional late-1970s look than a plain blackwall tire would. Sidewall choice matters because it changes the finished appearance even when the tire size remains the same.

For a restoration-oriented RX-4, sidewall style can be just as important as the size code on the side of the tire. A narrow whitewall can complement the period character of the car without claiming exact originality for every individual vehicle. If appearance is a major priority, compare the sidewall treatment with the car’s trim, wheels, and overall presentation before deciding.

BFGoodrich is represented in the available 195/70R13 fitment for the 1978 Mazda RX-4. The product shown in that size is the BFGoodrich Silvertown Radial, a radial tire with a narrow whitewall sidewall style. At this vehicle level, brand choice is tied closely to the available size and product format rather than a large multi-brand spread.

Brand is only one part of the decision on a vintage Mazda. It helps more to compare how the available tire aligns with the car’s wheel width, intended use, and desired look. On a vehicle like the RX-4, a buyer often ends up choosing not just a brand name, but a combination of size convention, sidewall appearance, and radial construction that suits the finished car.

A period-style 1978 Mazda RX-4 usually starts with deciding whether the car should present itself with a vintage alphanumeric radial size or a modern metric radial size. BR70-13 gives the sidewall a more era-appropriate alphanumeric look, while 195/70R13 still stays within the car’s 13-inch radial fitment and may suit owners who prefer a more familiar modern size format.

The right choice depends on how closely the finished car is meant to reflect late-1970s presentation versus everyday usability and parts familiarity. Exact originality can vary by individual vehicle history, so appearance-focused owners should compare the tire choice with marque references, period photos, or other vehicle-specific documentation if absolute historical accuracy is the goal.

On the 1978 Mazda RX-4, the primary fitments are both radial, so the visual difference is less about choosing bias-ply versus radial and more about choosing the sizing format and sidewall treatment. A BR70-13 preserves a vintage alphanumeric radial presentation, while a 195/70R13 gives the car a more modern metric-marked sidewall.

Appearance also changes with sidewall styling. A narrow whitewall can shift the car toward a more traditional late-1970s visual character, even when the underlying construction remains radial. For a restored RX-4, the tire should work with the car’s wheels, stance, and trim rather than being treated as an isolated detail, since tire presentation strongly affects the final look.

Yes. Even though the 1978 Mazda RX-4 uses 13-inch radial tire sizes, modifications can change whether a given tire works properly on the car. Aftermarket wheels, altered wheel width, suspension changes, lowering, or body modifications can all affect clearance and the way a tire sits within the fender and steering range.

That matters because an older RX-4 may no longer match its original wheel and suspension setup. Measure the actual wheel diameter and width, then check steering clearance, fender clearance, and the general condition of suspension components before installing tires. A car that has been modified should always be evaluated on its present configuration rather than on size alone.

Before driving a 1978 Mazda RX-4 on new tires, inspect the wheels for correct diameter and width, check that the tires are mounted and inflated properly, and confirm there is no contact at full steering lock or through suspension movement. It also helps to look over wheel hardware, valve stems, and general tire seating before the car returns to the road.

A collector-era car deserves a broader check than tire installation alone. Look at brake condition, suspension wear, alignment behavior, and any signs of rubbing from prior tire setups. The first drive should be short and cautious so the vehicle can be rechecked for pressure stability, clearance, and any unusual vibration that could point to wheel or chassis issues.

195/70R13 tires on a collector 1978 Mazda RX-4 should be maintained with regular pressure checks, visual inspections for cracking, bulges, cuts, uneven wear, and periodic confirmation that the tires are aging evenly. A car that sees limited use can still develop tire issues from time, storage conditions, and long stationary periods rather than from high mileage.

Storage habits matter almost as much as road miles on a vintage Mazda. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tire over time. It is also wise to inspect the tires before every meaningful outing, since collector cars often spend enough time parked for slow air loss or age-related condition changes to go unnoticed.