1985 BMW 735i Tires

The 1985 BMW 735i uses two radial tire sizes: 205/70R14 and 220/55R390. The 205/70R14 size fits a conventional 14-inch wheel, while 220/55R390 is a millimetric size used with the Michelin TRX wheel system.

The first step is confirming which wheels are actually on the car. A 14-inch wheel and a 390mm TRX wheel are not the same, even though they can seem close at a glance, so the tire choice should follow the wheel rather than assumptions about model year or trim.

A 1985 BMW 735i can use either a 14-inch rim with 205/70R14 tires or a 390mm rim with 220/55R390 tires. The conventional metric size and the TRX millimetric size are tied to different wheel systems.

Checking the wheel itself matters more than relying on memory, especially on a car that may have changed hands or had wheels swapped over the years. Confirm the rim marking, then compare tire and wheel sizing together so the tire bead, diameter, and overall setup stay matched correctly.

The 1985 BMW 735i Base can use the same two radial sizes found on this model range: 205/70R14 and 220/55R390. That means the sub-model itself does not force a single tire choice, but the wheel package does.

For selection purposes, the practical issue is not the Base designation but whether the car sits on standard 14-inch wheels or 390mm TRX wheels. Once that is confirmed, the decision becomes much easier and shifts to tire style, brand, and the kind of appearance you want the sedan to carry.

Start with the fact that 205/70R14 is the conventional inch-based radial option for the 1985 BMW 735i. Within that size, choices differ by brand, tire series, sidewall style, and rim-width specification, with options from Maxxis, BFGoodrich, and Michelin.

The right pick depends on how the car is used and presented. A blackwall Michelin XWX gives a different look than a narrow whitewall Maxxis MA-1 or a BFGoodrich redline, dual redline, or raised white letter tire, so appearance, wheel width, and intended road use should all be weighed together.

For the 1985 BMW 735i, available sidewall styles include blackwall, narrow whitewall, redline, dual redline, and RWL on applicable 205/70R14 tires. The 220/55R390 Michelin TRX-B is offered as a blackwall tire.

That variety gives the car very different visual personalities even when the tire size stays correct. Owners aiming for a restrained executive look often focus on blackwall or whitewall treatments, while redline or raised white letter options create a stronger period-performance feel without changing the basic 205/70R14 fitment.

The 1985 BMW 735i has tire options from Maxxis, BFGoodrich, and Michelin. Brand availability depends on the size, with 205/70R14 offering the broadest mix and 220/55R390 centered on Michelin TRX-B.

Brand choice should be considered alongside the actual wheel system and the look you want from the car. A 735i on standard 14-inch wheels has more freedom to compare series and sidewall treatments, while a car retaining TRX wheels follows a narrower, more specialized product path.

A period-style choice for a 1985 BMW 735i starts with keeping the correct wheel and tire system together. That means selecting either a 205/70R14 radial for the standard 14-inch setup or a 220/55R390 radial if the car still carries its millimetric TRX wheels.

After that, appearance becomes the deciding factor. Blackwall tires preserve a restrained executive-sedan presentation, while narrow whitewall, redline, dual redline, or raised white letter options can shift the car toward a more customized or era-flavored look, so originality-minded owners should compare against period photos or marque-specific references.

On a 1985 BMW 735i, construction is straightforward because both primary fitments are radial. The visible difference comes less from bias-ply versus radial and more from the wheel system itself, sidewall treatment, and whether the car uses standard 14-inch wheels or the distinct TRX millimetric setup.

That makes details such as blackwall versus whitewall or redline more important to the finished presentation. A restoration-oriented car can look noticeably different with each treatment, and the TRX wheel-and-tire combination also gives the car a more specific mid-1980s European character than a standard inch-based wheel package.

Yes, modifications can affect tire fitment on a 1985 BMW 735i. Aftermarket wheels, altered wheel widths, suspension changes, or body modifications can change the clearances and wheel specifications that the original 205/70R14 or 220/55R390 tire setup expects.

A car with changed wheels should be measured rather than treated like a stock example. Confirm actual rim diameter and width first, then inspect steering, fender, and suspension clearance through full travel so the selected tire matches the car as it sits today, not just how it left the factory era.

Before driving a 1985 BMW 735i on new tires, inspect the wheels for the correct diameter and condition, confirm proper mounting, and check that inflation pressure matches the tire’s requirements. It is also wise to look over the suspension, alignment condition, and visible clearances around the fenders and steering components.

A short, careful road test is a smart follow-up after installation. Listen for rubbing, watch for vibration, and recheck pressure after the tires have settled in, especially on a collector sedan that may have been sitting or one that uses the specialized 220/55R390 TRX wheel-and-tire arrangement.

Tires on a collector 1985 BMW 735i should be checked regularly for air loss, cracking, cuts, bulges, and uneven wear, even if the car is driven only occasionally. Low-mileage classics can age out tires long before they wear them out, so visual condition matters as much as tread depth.

Storage habits also play a big role in long-term tire health. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps preserve sidewalls, and periodic pressure checks are especially important on cars that spend long periods parked between drives or show appearances.