1985 Mercury Cougar Tires

The 1985 Mercury Cougar uses four primary tire sizes: 205/70R14, 215/70R14, 220/55R390, and 225/60R15. All are radial fitments, but they do not apply across every Cougar in the same way. Base and LS models use 14-inch sizes, trailer tow versions use 215/70R14, and the XR-7 is the configuration that brings in 220/55R390 or 225/60R15.

The practical first step is confirming the exact sub-model and wheel setup on the car. A 220/55R390 tire requires a millimetric wheel, while 205/70R14, 215/70R14, and 225/60R15 fit inch-based rims. If the Cougar has been changed over to different wheels at some point, measure the wheel diameter before selecting a tire rather than relying on trim name alone.

A 1985 Mercury Cougar can use 14-inch, 15-inch, or 390mm rims, depending on the exact application. The 205/70R14 and 215/70R14 sizes mount on 14-inch wheels, the 225/60R15 size mounts on a 15-inch wheel, and the 220/55R390 size is for a 390mm millimetric wheel used on certain XR-7 setups.

That distinction matters because a 390mm TRX wheel is not the same as a 15-inch wheel, even though the measurements seem close. Before ordering tires, confirm the actual wheel diameter stamped on the wheel or measured bead seat to bead seat. On an older Cougar, previous owners may have converted wheels, and that can change the correct tire size completely.

No, 1985 Mercury Cougar sub-models do not all use the same tire size. Base and LS models use 205/70R14 or 215/70R14, the LS w/Trailer Tow Option and Cougar w/Trailer Tow Option use 215/70R14, and the XR-7 uses either 220/55R390 or 225/60R15 depending on its wheel setup.

That means trim level is part of the fitment decision, but wheel verification is still essential. An XR-7 with original millimetric wheels needs a very different tire than one wearing 15-inch rims, and a Base or LS should not be assumed to share that setup. Checking both the sub-model and the wheel diameter prevents a mismatch before style or brand choices enter the picture.

Start with the exact size that matches the car's sub-model and wheel diameter, because the 1985 Mercury Cougar spans 14-inch, 15-inch, and 390mm applications. From there, compare the tire's construction, sidewall presentation, brand, and series. Since every primary fitment here is radial, the real choice is usually between appearance and intended use rather than between bias-ply and radial construction.

A more formal restoration-style Cougar may call for a whitewall or stripe treatment, while a sportier look may point toward redline, blackwall, or raised white letter designs. It also helps to compare rim-width compatibility and load figures where they are given. Choosing the correct size first, then narrowing by appearance and wheel compatibility, keeps the process straightforward.

1985 Mercury Cougar tires are available in several sidewall styles, depending on size. The range includes blackwall, narrow whitewall, wide whitewall, pin-white-stripe, redline, dual-redline, and RWL raised white letter designs. The sidewall choices vary by tire size, so not every style appears in every Cougar fitment.

That makes the correct size the starting point before appearance decisions are made. A 14-inch Cougar tire may offer a different mix of whitewall and stripe treatments than a 15-inch XR-7 application, and the TRX-style 220/55R390 stays in a blackwall presentation. Sidewall style changes the visual character of the car more than the fitment itself, so it is worth choosing deliberately.

Tires for the 1985 Mercury Cougar are available from Maxxis, BFGoodrich, Michelin, Cooper, Goodyear, and Avon, depending on the size. Brand availability changes with the fitment: 14-inch sizes include several BFGoodrich, Maxxis, Michelin, and Cooper choices, the 390mm XR-7 fitment is represented by Michelin TRX-B, and 225/60R15 adds Goodyear and Avon.

Brand choice should follow size and wheel compatibility, not the other way around. Once the proper size is confirmed, compare each brand's available tire series and sidewall treatment to match the Cougar's intended look and use. That approach is especially important on the XR-7, where the wheel format itself can narrow the brand options very quickly.

A period-style 1985 Mercury Cougar tire starts with the correct size for the car's exact sub-model and wheels, then moves to the sidewall and series that best suit the car's character. Whitewall, pin stripe, redline, blackwall, and raised white letter options are all available across different Cougar fitments, so the right visual choice depends on whether the car leans more formal, sporty, or performance-oriented.

Owners pursuing a careful restoration should avoid assuming that any available sidewall treatment is automatically original to their car. Build documentation, sales literature, and marque-specific references are the best way to verify appearance details when originality matters. Once that is settled, selecting the proper size and wheel format remains the foundation of a convincing result.

On a 1985 Mercury Cougar, primary fitment stays within radial construction, so the appearance change comes less from construction type and more from the way each radial tire is styled. A blackwall Michelin XWX or TRX-B presents very differently from a wide whitewall, redline, or raised white letter radial, even when the fitment itself is correct for the car.

That means a restored Cougar's finished look depends heavily on selecting the right sidewall treatment for the specific build. The XR-7 adds another visual variable because the 220/55R390 TRX setup carries a specialized wheel-and-tire presentation that differs from a conventional 15-inch package. Matching the wheel format first keeps the restoration from looking visually inconsistent.

Yes, modifications can affect tire fitment on a 1985 Mercury Cougar. Wheel changes are the biggest variable because this model already spans 14-inch, 15-inch, and 390mm applications from the factory range. If the car has aftermarket wheels, a suspension drop, altered springs, or body changes, the original tire size may no longer be the only dimension that matters.

Check actual wheel diameter and width first, then look at clearance around the fenders, steering components, and suspension through the full range of motion. On an XR-7, verify whether the car still has millimetric TRX wheels or has been converted to 15-inch rims. A modified Cougar should be measured directly rather than judged by trim badge or previous tire labeling alone.

Before driving a 1985 Mercury Cougar on new tires, inspect the wheels for the correct diameter and condition, make sure the tires are mounted in the proper size, and check inflation pressure against the tire and vehicle requirements. It also makes sense to inspect suspension wear, steering play, brake condition, and any signs of rubbing that could affect the new tires immediately.

A short test drive should include listening for contact on turns and checking that the car tracks cleanly without vibration. After the first miles, recheck air pressure and look for uneven seating or fresh marks inside the wheel opening. On collector-era cars that sit often, fresh tires work best when the rest of the chassis is ready for regular road use too.

Collector-use tires on a 1985 Mercury Cougar should be kept properly inflated, inspected regularly for cracking, bulges, cuts, and irregular wear, and protected from long periods of heat, sunlight, and moisture. Even a lightly driven Cougar can age its tires over time, so condition matters just as much as tread depth when the car spends much of its life parked.

Rolling the car occasionally, storing it on a clean surface, and checking for slow air loss can help preserve the tires between drives. It is also wise to inspect the spare and confirm that all four road tires still match the car's current wheel setup. A Cougar that sees occasional highway use deserves more frequent checks than one used only for local events.