1990 Lamborghini Tire Fitment Guide

1990 Lamborghini vehicles use two tire sizes, and both belong to the Diablo. The front size is 245/40R17 and the rear size is 335/35R17, so this is a staggered setup rather than a single interchangeable size at all four corners. Both sizes mount on 17-inch wheels, but their rim-width ranges are different: 245/40R17 spans 7.0 to 9.5 inches depending on the tire, while 335/35R17 spans 11.0 to 13.0 inches.

That means the first fitment question is not just year and make, but also tire position. A front tire cannot simply be substituted for the rear, and the rear requires the much wider wheel that matches the 335 section width. If your Diablo has aftermarket wheels, confirm the actual wheel width before ordering so the tire matches both the car’s intended front-or-rear location and the wheel it will be mounted on.

On a 1990 Lamborghini Diablo, 245/40R17 means the tire is 245 millimeters wide, has a 40-series aspect ratio, uses radial construction, and fits a 17-inch wheel. In this year and make, that size is the Diablo’s front tire. BFGoodrich covers this size with Blackwall radial options, and the available speed ratings include W and Y, which correspond to 168 mph and 186+ mph ceilings.

For a Diablo owner, the practical takeaway is that 245/40R17 is not a generic 17-inch size but the specific front half of the original staggered arrangement. If you are replacing tires in pairs, make sure the front pair stays in this size unless the car has been intentionally re-engineered. Matching the correct front size preserves the steering balance and visual proportion Lamborghini designed into the car.

No. The 1990 Lamborghini range covered here consists of the Diablo, and it uses two different tire sizes rather than one common fitment. The front axle takes 245/40R17 and the rear axle takes 335/35R17. Even though both tires share a 17-inch rim diameter and both are radial designs, they serve different positions on the car and are not interchangeable side to side or front to rear.

That matters because many vintage and collector vehicles use a square setup, while the Diablo does not. When identifying the right tire, confirm not only that you have a 1990 Lamborghini Diablo, but also whether you are replacing the front tires, the rear tires, or the full set. Owners comparing options should think in matched front-and-rear pairs, not as one universal size for the whole car.

1990 Lamborghini Diablo fitments are covered by BFGoodrich and Michelin. BFGoodrich covers the 245/40R17 front size with multiple radial Blackwall choices, while Michelin covers the 335/35R17 rear size with a radial Blackwall option in 335/35ZR17. That means brand choice is tied partly to tire position, not just personal preference, because the front and rear sizes do not have the same brand mix.

For an owner shopping the full car, the practical approach is to treat the front and rear separately while still maintaining a coherent performance-oriented setup. If you are only replacing the front pair, BFGoodrich gives you multiple choices within the correct size. If you are replacing the rear pair, the Michelin option carries the wide rear fitment the Diablo is known for and should be matched to the proper rear wheel width.

1990 Lamborghini Diablo tires are available in Blackwall form in both the 245/40R17 front size and the 335/35R17 rear size. That suits the Diablo’s original era and character well, since early-1990s exotic performance cars were built around low-profile, modern-looking black sidewalls rather than whitewalls or decorative sidewall treatments. Across these sizes, the visual emphasis stays on the wheel design and the car’s dramatic bodywork rather than on the sidewall itself.

For a buyer concerned with appearance, that makes the selection process straightforward. You do not need to choose between multiple period sidewall treatments the way you might with a 1950s or 1960s collector car. Instead, focus on getting the correct front or rear size, the proper rim-width compatibility, and the speed rating that best matches how your 1990 Lamborghini will be used on the road.

For the 1990 Lamborghini Diablo’s 245/40R17 front size, the BFGoodrich g-Force Sport COMP-2 and g-Force Phenom T/A differ in speed rating, load figure, and rim-width coverage. The g-Force Sport COMP-2 is a 91W tire with a 1,356-pound maximum load at 51 psi and a 7.0-to-8.0-inch rim-width range. The g-Force Phenom T/A is a 95Y tire with a 1,521-pound maximum load at 50 psi and an 8.0-to-9.5-inch rim-width range.

Those differences matter most if your Diablo’s front wheels sit toward the narrow or wide end of the acceptable range, or if you want a tire with the higher available speed-rating ceiling. The correct choice starts with measuring the actual front wheel width and then checking whether you want the W-rated or Y-rated option. Either way, staying within the tire’s approved wheel range is more important than choosing by name alone.

On a 1990 Lamborghini Diablo, the 245/40R17 front size fits a range of wheel widths depending on the exact tire, from 7.0 inches up to 9.5 inches. Within that same size, one front tire is suited to 7.0-to-8.0-inch wheels, while others span 8.0-to-9.5 inches. The 335/35R17 rear size requires a much wider wheel, with a range of 11.0 to 13.0 inches. Both sizes use 17-inch rim diameter, but width compatibility is very different front to rear.

That is why wheel measurement matters before final selection, especially on a Diablo that may have seen aftermarket wheel changes over the years. The tire size alone is not enough if the wheel width falls outside the approved range for the exact product you want. Confirm the actual wheel width at each axle and match the tire to that wheel rather than assuming every 245/40R17 or 335/35R17 fits every 17-inch wheel the same way.

The 1990 Lamborghini Diablo tire options here are modern radial fitments with no tube-type marking in the size descriptions, so they are treated as tubeless radial products. The front 245/40R17 options and the rear 335/35R17 option all follow that modern performance-tire pattern. That aligns with what most owners would expect from an early-1990s supercar using low-profile 17-inch radial tires rather than vintage tube-type construction.

Even so, tubeless tires still depend on the wheel being in proper condition. Before mounting new tires, inspect the bead seats, valve stems, and wheel surfaces carefully, especially on a collector exotic that may spend long periods parked. If your Diablo wears specialty or older refinished wheels, have the installer confirm the wheel condition and sealing surfaces so the tubeless setup performs as intended.

A 1990 Lamborghini Diablo uses both sizes on 17-inch wheels, so the original wheel diameter is compatible with the front 245/40R17 and rear 335/35R17 sizes. That does not mean the same wheel can be used in both positions, because the front and rear tires require very different wheel widths. The front size spans 7.0 to 9.5 inches depending on the tire, while the rear size spans 11.0 to 13.0 inches.

In practice, the correct answer is yes for diameter and no for interchangeability. The Diablo’s original staggered concept depends on dedicated front and rear wheel widths, so tire choice should respect that layout. If you are restoring a car to factory-style proportions or checking an existing wheel set, confirm each axle’s wheel width independently before assuming a 17-inch wheel alone is enough to make either tire size appropriate.

A 1990 Lamborghini should be stored in a cool, dry 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 the same footprint is not carrying the vehicle’s weight for months at a time. Because the Diablo uses low-profile radial tires, prolonged static storage can still encourage flat-spotting and age-related sidewall stress even though radials generally recover better than older bias-ply designs.

Owners who store a Diablo for the season often benefit from either occasional rolling movement or properly placed vehicle stands that reduce long-term load on the tires. Avoid parking on bare earth or damp concrete for extended periods, and check pressure before the car goes into storage and again before it returns to the road. Tire care during storage is especially important on an exotic where replacement sizes are specialized and not casually interchangeable.

On a 1990 Lamborghini, tire age is usually more important than mileage. Collector and exotic cars often accumulate miles slowly, so tread depth can look healthy long after the rubber itself has aged. A sensible rule is to begin evaluating the tires carefully once they reach about five to seven years of age and to treat around ten years as a serious replacement consideration regardless of remaining tread. The DOT date code on the sidewall is the starting point for that timeline.

For a Diablo, that means judging the tires as age-sensitive components rather than as parts to be run until the tread is gone. If the car is driven infrequently, inspect the sidewalls for cracking, monitor air retention, and pay attention to any vibration or harshness that appears as the rubber hardens over time. Age-related replacement is often the right decision even when the tires still look cosmetically presentable from a distance.

Tires on a 1990 Lamborghini should be inspected before every drive and again before any longer outing. Look for sidewall cracking, cuts, bulges, irregular wear, embedded debris, and pressure loss. Because the Diablo uses a staggered setup with specialized front and rear sizes, it is also worth confirming that the correct sizes remain on the correct axle and that each tire is wearing evenly across its tread. Valve stems and wheel condition deserve attention as part of the same check.

That pre-drive routine matters more on a low-use exotic than on a daily driver because time, storage, and long periods of inactivity can create problems that are not obvious until the car is back at speed. A quick visual inspection is not enough before a touring event or highway trip. Check pressures cold, inspect the spare if one is carried, and address any vibration, wandering, or pull before planning a longer drive.

A 1990 Lamborghini Diablo belongs to an era when radial performance tires were standard equipment on high-end exotics, and its fitment here reflects that with 245/40R17 fronts and 335/35R17 rears. The key originality points are the staggered layout, the low-profile modern metric sizing, and the use of Blackwall radial construction rather than an earlier-style bias-ply format. No original-equipment brand should be assumed without checking factory literature or model-specific historical sources.

For restoration work, the safest path is to preserve the Diablo’s front-and-rear size relationship and its modern supercar appearance rather than treating it like an older classic with broader substitution latitude. If you are preparing a car for marque judging or a highly original presentation, verify market-specific details through factory manuals, period road tests, or Lamborghini club resources. That extra step helps separate true period-correct fitment from later replacement habits.

Correct tire fitment does matter when showing a 1990 Lamborghini, especially on a car as visually dependent on stance and wheel-to-body proportion as the Diablo. Judges and knowledgeable enthusiasts will notice whether the car retains the proper staggered setup, appropriate low-profile radial sizing, and a sidewall appearance consistent with a 1990 exotic. An incorrect front-to-rear relationship, oversized substitutions, or a visibly non-period sidewall treatment can distract from an otherwise strong presentation.

The practical standard is to think beyond simple wheel diameter and focus on overall authenticity of the tire package. Even if an alternate size can be mounted, it may change the way the car sits and reads visually. For event-specific expectations, consult Lamborghini club judging guides or organizers beforehand, since some venues are stricter about originality while others place more emphasis on condition and overall era-correct presentation.

For the 1990 Lamborghini Diablo’s 245/40R17 front size, the BFGoodrich g-Force COMP-2 A/S and g-Force Phenom T/A differ in speed rating, load figure, and fitment range. The COMP-2 A/S appears as a 91W tire and fits 8.0-to-9.5-inch rims, while the Phenom T/A appears as a 95Y tire, fits the same 8.0-to-9.5-inch rim range, and carries a 1,521-pound maximum load at 50 psi. Both are Blackwall radials and remain visually appropriate for the Diablo’s modern 1990 character.

For an owner balancing authenticity and use, the visual distinction between the two is smaller than the technical one. The choice comes down more to the exact speed-rating and load specifications you want within the correct front size than to a major change in outward period appearance. If the goal is a factory-style look with the right modern exotic profile, either keeps the Blackwall radial theme intact as long as the size and wheel-width match are correct.

Yes, the 1990 Lamborghini Diablo tire options here are modern radial performance tires suited to highway use when they are in good condition, correctly inflated, and matched to the proper wheel widths. The 245/40R17 front options include W- and Y-rated tires, carrying speed ceilings of 168 mph and 186+ mph, while the 335/35ZR17 rear size is also built in a high-performance radial format. In real-world driving, tire condition and correct setup matter more than theoretical top-speed capability on paper.

For a Diablo, highway safety also depends heavily on the condition of the car itself. Suspension bushings, alignment, brakes, and steering all play a major role in how stable the car feels at speed, especially on a low, wide supercar with a staggered tire package. Before regular highway use, make sure the tires are not aged out, that pressures are set correctly, and that the car tracks cleanly without vibration or pull.

Inflation pressure on a 1990 Lamborghini should follow the vehicle manufacturer’s recommendation for the Diablo first, then be checked against the tire’s own load-and-pressure information where that is published. Among the 245/40R17 front tires, one BFGoodrich option carries 1,356 pounds at 51 psi and another carries 1,521 pounds at 50 psi. Those figures are maximum load-and-pressure references for those specific tires, not a blanket instruction to inflate every Diablo tire to the same number.

The practical rule is to avoid transferring a pressure figure from one product or axle position to another. Front and rear tires on a Diablo serve different roles and often run different operating pressures in factory service literature. Use the owner’s manual or door-jamb information for the baseline, then verify that the chosen tire is appropriate for that use. Recheck pressures cold, especially after seasonal storage or long periods without driving.

Before a longer drive in a 1990 Lamborghini Diablo, inspect all four tires for sidewall cracking, cuts, punctures, bulges, uneven tread wear, and any signs of impact damage from previous road hazards. Verify cold inflation pressures, confirm that the 245/40R17 tires are on the front and the 335/35R17 tires are on the rear, and look over the valve stems and wheel lips for leakage or damage. If the tires are older, pay extra attention to age-related hardening or visible surface checking.

A tire inspection should be part of a broader pre-drive routine on any 1990 Lamborghini, not a standalone check. Make sure the spare plan is understood, the brakes and fluids are ready for use, and the suspension feels settled and predictable on the first few miles. Exotic cars that sit can hide issues until they are fully warmed and back at speed, so a careful once-over before departure is always time well spent.