In 1985, Maserati balanced two very different roles in the luxury performance market: the compact, twin-turbocharged Biturbo and the formal, long-wheelbase Quattroporte sedan. That split makes 1985 Maserati tire selection more than a simple year-and-make exercise, because the brand's sporty coupe and executive four-door did not ride on the same wheel and tire package. Three radial sizes appear across two models, with the Biturbo using 14-inch fitments and the Quattroporte moving to a 15-inch size. Before choosing a tire for a 1985 Maserati, the first step is confirming your exact model, then narrowing the choice to the correct size and sidewall style for your intended use.
Which Tire Size Is Right for Your 1985 Maserati
Three tire sizes are used across 1985 Maserati models, and they vary by model rather than being shared across the full range. The real decision starts with identifying whether you have a Biturbo on 14-inch wheels or a Quattroporte on 15-inch wheels, then choosing the product character and sidewall style that best suit your car. Understanding that distinction before choosing a product saves time and helps match the tire to the correct Maserati platform.
Year(s): 1985|Fit(s): Biturbo|Construction: Radial|Rim: 14 in
195/60R14 is a metric radial size with a 195-millimeter section width, a stated 60-series profile, and a 14-inch rim diameter. In this size, Michelin is available with a blackwall sidewall, and the tire is tubeless with a V speed rating carrying a 149 mph ceiling. This size is specific to the Biturbo rather than universal across 1985 Maserati models. It suits owners who want the compact, lower-profile radial fitment associated with the Biturbo's sharper grand-touring character.
Year(s): 1985|Fit(s): Biturbo|Construction: Radial|Rim: 14-in rim
205/60R14 is a metric radial size that uses a 205-millimeter section width, a stated 60-series profile, and a 14-inch rim diameter. No current product details appear here for brand, sidewall style, tube status, or speed rating, but the size itself remains a Biturbo-specific 14-inch radial fitment. This size is specific to the Biturbo and not shared with the Quattroporte. It is the alternate Biturbo fitment to confirm against the actual car before moving on to a specific tire choice.
Year(s): 1985|Fit(s): Quattroporte|Construction: Radial|Rim: 15 in
225/70R15 is a metric radial size with a 225-millimeter section width, a stated 70-series profile, and a 15-inch rim diameter. This size is available from Goodyear, Cooper, and Michelin, with blackwall and raised white letter sidewall styles, and speed ratings vary by product because Michelin XWX carries a W rating with a 168 mph ceiling while other versions show no speed letter in the size marking. The Quattroporte alone uses this size, giving it a distinct 15-inch fitment compared with the Biturbo. It is the right path for owners balancing original luxury-sedan appearance against whether they prefer a blackwall European-style presentation or a raised white letter look.
Two Maserati models are covered for 1985, and they do not share the same tire sizes. The Biturbo and Quattroporte sit in very different parts of Maserati's lineup, so identifying the model matters before anything else because wheel diameter and tire size change with the model. Select your model below for model-specific fitment history and products.
1985 Maserati Biturbo
The 1985 Maserati Biturbo was the brand's compact luxury performance car, blending Italian styling with turbocharged six-cylinder power in a smaller, more agile package than the company's traditional sedans. Its tires mount on 14-inch rims, and the lower-profile radial sizes used here fit the Biturbo's sport-oriented personality more closely than the Quattroporte's taller 15-inch fitment.
The 1985 Maserati Quattroporte carried Maserati's traditional role as an exclusive Italian luxury sedan, with formal styling and a larger overall footprint than the Biturbo. Its tires mount on 15-inch rims, and the single 225/70R15 fitment reflects the Quattroporte's more substantial touring-sedan stance.
Five products are available across three tire sizes for 1985 Maserati vehicles. The 195/60R14 size has one Michelin radial in blackwall, while 225/70R15 includes four radial choices from Goodyear, Cooper, and Michelin in blackwall and raised white letter styles. Confirm your model first, then verify the exact size because speed ratings can vary within a size.
These FAQs cover the model split between Biturbo and Quattroporte, the meaning of the metric radial sizes used across 1985 Maserati fitments, sidewall and brand differences, and the care collector cars need when they spend long periods between drives.
Size Basics & Fitment
What tire sizes fit 1985 Maserati vehicles?
1985 Maserati vehicles use three sizes across two models: 195/60R14 and 205/60R14 for the Biturbo, and 225/70R15 for the Quattroporte. The Biturbo sizes mount on 14-inch rims, while the Quattroporte size mounts on a 15-inch rim. Rim width guidance appears within the available 225/70R15 products, where applications span 6.0 to 8.0 inches depending on the tire.
That means year and make alone are not enough for a confident choice on a 1985 Maserati. Start by confirming whether your car is a Biturbo or a Quattroporte, then match the actual size marked on the car or called for in the owner's literature. If your car has been restored or modified, compare the sidewall marking to the wheel you plan to use before moving ahead.
What does 195/60R14 mean on a 1985 Maserati tire?
On a 1985 Maserati, 195/60R14 is a metric radial size. The 195 is the nominal section width in millimeters, 60 is the aspect ratio, R identifies radial construction, and 14 is the wheel diameter in inches. Within 1985 Maserati applications, this size belongs to the Biturbo rather than the Quattroporte.
For a buyer, that code matters because it combines width, profile, construction, and rim diameter in one marking. A 195/60R14 tire will not interchange with the Quattroporte's 15-inch fitment, and it should not be confused with the Biturbo's alternate 205/60R14 size either. Checking the full sidewall marking on the car is the quickest way to avoid ordering the wrong width or wheel diameter.
Do all 1985 Maserati models use the same tire size?
No, 1985 Maserati models do not all use the same tire size. The Biturbo uses 195/60R14 or 205/60R14, while the Quattroporte uses 225/70R15. The difference is not just section width; the wheel diameter changes from 14 inches on the Biturbo to 15 inches on the Quattroporte.
That model split reflects the very different roles of the two cars. The Biturbo is a smaller, more sporting platform, while the Quattroporte is a larger luxury sedan with a taller touring-style fitment. If you are unsure which Maserati you have, identify the model before comparing brands or sidewall styles, because the correct size family depends on the model first.
Buying the Right Tire
What sidewall styles are available for 1985 Maserati tires?
1985 Maserati tires are available with different sidewall appearances depending on size. The 195/60R14 Michelin option for the Biturbo is a blackwall, while the 225/70R15 size used on the Quattroporte is available in both blackwall and raised white letter form. That gives the Quattroporte owner more latitude in the final look than the currently covered Biturbo option.
For most Italian luxury and performance restorations of this period, blackwall usually aligns more closely with the understated European presentation buyers expect to see. Raised white letters create a more overtly period-accessory or custom look, which may appeal to some owners but can shift the Quattroporte away from its original executive character. If appearance matters as much as fitment, decide on sidewall style before narrowing down to a specific tire.
What brands make tires for 1985 Maserati vehicles?
Michelin, Goodyear, and Cooper all cover 1985 Maserati applications across the available sizes. Michelin appears in both the Biturbo's 195/60R14 size and the Quattroporte's 225/70R15 size, while Goodyear and Cooper appear in 225/70R15 for the Quattroporte. Each brand brings a different visual character through sidewall treatment as well as a different product family.
Brand choice on a 1985 Maserati often comes down to matching the car's personality and the owner's priorities. A Michelin blackwall tends to suit a European luxury or sporting presentation, while Goodyear and Cooper raised white letter versions create a more assertive period look on the 15-inch Quattroporte fitment. Once the correct size is confirmed, comparing brand and sidewall style is the next useful step.
What is the difference between Michelin XWX and Goodyear Polysteel for the 1985 Maserati Quattroporte?
For the 1985 Maserati Quattroporte, both Michelin XWX and Goodyear Polysteel are available in 225/70R15 radial form, but they differ in presentation and specifications. The Michelin XWX is a blackwall 225/70VR15 92W TL tire with a W speed rating, a 168 mph ceiling, and a rim width range of 6.00 to 8.00 inches. The Goodyear Polysteel versions use raised white letter sidewalls, fit an 8-inch rim, and carry a maximum load of 1,753 pounds at 35 psi.
That makes the choice less about basic fitment and more about what kind of Quattroporte you are building. The Michelin leans toward a more formal European appearance and carries an explicit high-speed rating, while the Goodyear Polysteel delivers a different visual statement through its raised white letters. Either way, confirm the wheel width on the car before choosing between them.
Fitting & Setup
What rim width do 1985 Maserati tires require?
Available rim width guidance for 1985 Maserati tires appears in the Quattroporte's 225/70R15 products. That size spans 6.0 to 7.5 inches in one Cooper application, 6.00 to 8.00 inches in the Michelin XWX, and 8 inches in the Goodyear Polysteel versions. All of those still share the same 15-inch rim diameter, but the acceptable wheel width can change with the tire design.
The practical takeaway is that wheel diameter alone is not enough when selecting a Quattroporte tire. Measure the wheel actually on the car, then compare it to the rim width range of the specific tire you want rather than assuming every 225/70R15 fits every 15-inch wheel the same way. That extra step helps preserve proper tread shape, steering response, and sidewall support.
Do 1985 Maserati tires require inner tubes?
Tube status for 1985 Maserati tires depends on the exact product. The 195/60R14 Michelin MXV3-A for the Biturbo is marked TL, which means tubeless, and the 225/70VR15 Michelin XWX for the Quattroporte is also marked TL. Other 225/70R15 products do not carry a tube marking in the size description here, so tube use can vary by product and wheel condition rather than being assumed across the board.
That matters most on older wheels or on cars that have seen refinishing, corrosion, or prior repairs. If your 1985 Maserati still wears original wheels, inspect the bead seats and valve areas carefully before deciding how to mount the tire. When in doubt, match the mounting approach to the exact sidewall marking and the wheel's real-world condition rather than treating all products in the same size as interchangeable.
Maintenance, Storage & Longevity
How should I store a 1985 Maserati when the tires are fitted?
A 1985 Maserati should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment that can age rubber. Keep the tires clean, maintain inflation, and move the car periodically so one contact patch does not carry the load for months at a time. Long stationary periods can create flat spotting, especially on collector cars that spend more time parked than driven.
If the car will sit for an extended season, some owners use tire cradles or support the vehicle to reduce sustained load, but the suspension should still be considered as part of the plan. The goal is to protect both the tire structure and the visible sidewalls. A luxury-performance car like a 1985 Maserati benefits from storage habits that preserve appearance just as much as road manners.
How long do tires on a 1985 Maserati typically last?
Tires on a 1985 Maserati are usually judged by age before tread wear becomes the main issue. A good rule is to begin close evaluation around the five- to seven-year mark and to treat roughly ten years as the point where replacement deserves serious consideration, even if the tread still looks usable. The DOT date code on the sidewall is the best reference for the tire's actual age.
Collector cars often cover low mileage, which can make old tires appear healthier than they really are. Rubber hardens over time, internal materials age, and long storage periods can accelerate sidewall cracking or flat spotting even when mileage stays low. If a 1985 Maserati has older tires of uncertain age, age alone is enough reason to inspect them carefully before trusting them on regular road use.
How often should tires on a 1985 Maserati be inspected?
Tires on a 1985 Maserati should be inspected before every drive and again before any longer outing or highway trip. Look for sidewall cracking, cuts, bulges, uneven tread wear, low pressure, and signs that the tire has been run underinflated. Valve stems also deserve attention, especially on older wheels where age and heat can harden the rubber around the stem area.
Frequent inspections matter because collector cars often spend weeks between drives, and problems can develop while the car is parked rather than while it is being used. A quick visual check plus a pressure check takes very little time and helps catch age-related issues before they turn into vibration, poor handling, or a roadside problem. On a 1985 Maserati, that habit is part of responsible ownership.
Restoration & Authenticity
What tires were originally fitted to the 1985 Maserati Biturbo?
A 1985 Maserati Biturbo would have been fitted with radial tires rather than earlier bias-ply construction, and the year-specific fitments here are 195/60R14 and 205/60R14. Those sizes place the car squarely in the modern metric radial era, which suits the Biturbo's 1980s European luxury-performance identity. Original-equipment brand confirmation can vary by market and delivery specification, so size and construction are the most important starting points.
For a restoration, getting the radial construction, wheel diameter, and overall look right usually matters more than chasing a brand assumption. Market-specific details can differ between U.S. cars and other deliveries, and enthusiast clubs or marque specialists are the best places to confirm what was typical for your exact Biturbo. Once that is settled, choose the size that matches your car's actual fitment rather than the year alone.
Does correct tire fitment matter for showing a 1985 Maserati?
Yes, correct tire fitment matters when a 1985 Maserati is judged seriously. Size, construction, sidewall style, and overall visual character can all affect whether the car presents as authentically restored. On an Italian luxury-performance car from the mid-1980s, an obviously mismatched wheel diameter or an off-character sidewall treatment can stand out quickly, even if the tire physically fits.
For a Biturbo or Quattroporte aimed at concours or marque judging, confirm the exact model fitment first and then select a sidewall style that suits the car's original market character. Blackwall generally aligns most naturally with the refined European look many judges expect to see. If you plan to compete, check the event's standards or consult a Maserati club before making final cosmetic choices.
What is the difference between the two Goodyear Polysteel versions for the 1985 Maserati Quattroporte?
The two Goodyear Polysteel choices for the 1985 Maserati Quattroporte share the same 225/70R15 radial size, raised white letter sidewall treatment, 8-inch rim fitment, 30-pound weight, and maximum load of 1,753 pounds at 35 psi. The visible distinction is the letter style, with one using smaller raised white letters and the other using larger lettering. Mechanically, they sit very close to one another from the available specifications.
That makes this a styling decision more than a fitment decision. Owners building a period-look Quattroporte with a stronger visual statement may prefer one lettering style over the other, while others may decide that a blackwall Michelin better suits the sedan's formal character. Compare the sidewall appearance to the car's wheels, trim, and overall restoration direction before choosing between them.
Safety & Road Use
Are 1985 Maserati tires safe for highway driving?
1985 Maserati tires can be suitable for highway driving when they are the correct size, in good condition, and used within their construction and speed-rating limits. The 195/60VR14 Michelin MXV3-A carries a V rating with a 149 mph ceiling, and the 225/70VR15 Michelin XWX carries a W rating with a 168 mph ceiling. Other 225/70R15 products do not show a speed letter in the size marking here, so the exact tire should be checked individually before assuming a rating.
In real use, the condition of the car often matters as much as the condition of the tires. A 1985 Maserati may have the speed capability of a true grand-touring machine, but braking, suspension health, alignment, and age-related mechanical needs still shape how safely the car behaves on modern roads. Tire choice should support the car's intended use, but the whole chassis needs to be ready as well.
What inflation pressure should I use for 1985 Maserati tires?
Inflation pressure on a 1985 Maserati should follow the vehicle manufacturer's recommendation for the car and size, with the tire's own maximum-pressure marking treated as a tire limit rather than a blanket running pressure. Among the available 225/70R15 products, maximum load figures of 1,753 pounds appear at 35 psi for Goodyear Polysteel and Cooper Cobra Radial G/T. Those figures apply to those specific tires and should not be transferred automatically to other sizes.
The safest approach is to begin with the pressure guidance for your exact Maserati model and then confirm that the chosen tire is being used within its own rated limits. Biturbo and Quattroporte fitments are not interchangeable, and one pressure figure should never be treated as universal across all 1985 Maserati tires. Consistent pressure checks are especially important on low-use collector cars that can lose air while parked.
What should I check before taking a 1985 Maserati on a longer drive?
Before a longer drive in a 1985 Maserati, inspect the tires for cracking, cuts, bulges, punctures, uneven wear, and proper inflation. Confirm that the sidewall size matches the model, make sure valve stems are sound, and inspect the spare as carefully as the four road tires. On a car that sits often, age-related issues can show up in rubber long before tread wear becomes obvious.
A sensible pre-trip routine goes beyond tires and includes brakes, belts, hoses, fluids, lights, and the cooling system, especially on a turbocharged Biturbo or a large luxury sedan like the Quattroporte. Tire condition is simply one part of making the whole car road-ready. Spending a few minutes on that inspection can prevent vibration, heat-related trouble, or an avoidable roadside delay.
