1998 Lamborghini Tire Fitment Guide

1998 Lamborghini vehicles use two tire sizes, both on the Diablo: 245/40R17 and 335/35R17. Both are radial tires for 17-inch wheels, but they are not interchangeable with each other because they serve different positions in the Diablo’s staggered setup. The 245/40R17 fits wheels in the 7.0 to 9.5-inch width range depending on the tire, while the 335/35R17 fits wheels in the 11.0 to 13.0-inch width range.

That means the first step is not simply confirming year and make, but identifying whether you need the front or rear fitment on your 1998 Lamborghini Diablo. The shared 17-inch rim diameter can make the sizing look simpler than it is, but section width and wheel-width range are very different. Checking the tire already on the car and measuring the wheel width before replacement helps prevent ordering a front-size tire for a rear wheel, or vice versa.

On a 1998 Lamborghini Diablo, 245/40R17 means the tire is 245 millimeters wide, has a 40-series aspect ratio, and fits a 17-inch wheel. The "R" indicates radial construction, which is the standard format used here. In this size, BFGoodrich options carry W and Y speed ratings, with W rated to 168 mph and Y rated above 186 mph.

That decoding matters because 245/40R17 is more than a numeric code; it defines the tire’s physical dimensions and the wheel it can safely mount on. For a 1998 Lamborghini, it also identifies one side of the Diablo’s staggered arrangement rather than a universal fitment for every wheel on the car. If you are replacing only a pair, match the exact size on the axle being serviced and confirm the wheel falls within the approved width range for the specific tire.

For 1998 Lamborghini, only the Diablo appears in this range, but even that single model does not use one identical tire size at every corner. The Diablo uses both 245/40R17 and 335/35R17, each on a 17-inch rim diameter but with very different section widths and wheel-width requirements. That makes the answer no in practical terms, because one 1998 Lamborghini Diablo requires two distinct sizes.

The important takeaway is that knowing you own a 1998 Lamborghini is only the starting point. You also need to know which axle you are servicing and whether the car still wears its intended staggered wheel arrangement. A buyer replacing all four tires should treat the front and rear fitments as separate decisions, even when choosing within the same brand family or trying to maintain the car’s original visual proportion.

1998 Lamborghini Diablo tires in these sizes are available in Blackwall form. The 245/40R17 BFGoodrich choices are Blackwall, and the 335/35R17 Michelin option is also Blackwall. That suits the period well, since a late-1990s Lamborghini supercar would have worn a modern performance-oriented sidewall treatment rather than a wide whitewall or vintage decorative style.

For most Diablo owners, sidewall selection is less about ornament and more about preserving the clean, technical look the car had when new. A Blackwall keeps attention on the wheel design and the dramatic bodywork, which is consistent with the era and market position of a 1998 Lamborghini. If visual authenticity matters, keeping both axles in a similarly understated sidewall style is usually the cleanest approach.

BFGoodrich and Michelin currently cover the tire sizes used on 1998 Lamborghini Diablo models. BFGoodrich offers the 245/40R17 fitment, while Michelin covers the wider 335/35R17 size. Both are radial Blackwall performance tires built around the Diablo’s 17-inch wheel package.

That brand split is especially important on a staggered supercar because you may not find the same manufacturer across both axle sizes. Some owners prioritize maintaining the car with a complete axle-matched pair first, while others work toward a full four-tire strategy that respects the Diablo’s front-to-rear balance. Before making a final choice, confirm that the exact size you need is available in the brand and speed-rating range appropriate to your intended use.

For the 1998 Lamborghini Diablo’s 245/40R17 size, the BFGoodrich g-Force Sport COMP-2 and g-Force Phenom T/A differ in speed rating, wheel-width range, weight, and published load figure. The Sport COMP-2 is a 91W tire with a 7.0 to 8.0-inch rim-width range, 26-pound weight, and 1,356-pound maximum load at 51 psi. The g-Force Phenom T/A is a 95Y tire with an 8 to 9.5-inch rim-width range, 25.88-pound weight, and 1,521-pound maximum load at 50 psi.

Those details matter because a 1998 Lamborghini owner is not simply choosing between two names; the tire has to suit the actual wheel and the way the car will be driven. The narrower approved wheel range on the Sport COMP-2 may make it a better match for some front wheel widths, while the Phenom T/A’s broader range and higher speed/load figures may better suit others. The right choice begins with measuring the wheel and matching the tire’s published specifications to it.

On a 1998 Lamborghini Diablo, rim width depends on tire size and, in the case of the 245/40R17, the specific tire chosen. The 245/40R17 BFGoodrich range fits wheels from 7.0 to 9.5 inches wide, with one option covering 7.0 to 8.0 inches and others covering 8.0 to 9.5 inches. The 335/35R17 Michelin fits wheels from 11.0 to 13.0 inches wide.

That spread makes wheel measurement a necessary step before replacement, especially if the car has been modified or restored with non-original wheels. A 17-inch diameter alone is not enough to confirm proper fit. On a 1998 Lamborghini, choosing a tire outside its approved wheel-width range can affect tread shape, steering response, and rear footprint, so it is wise to verify the actual wheel dimensions rather than relying on appearance alone.

The original-style 17-inch wheels on a 1998 Lamborghini Diablo remain compatible in diameter with both tire sizes used on the car, since both 245/40R17 and 335/35R17 mount on 17-inch rims. Diameter compatibility does not make the two sizes interchangeable, though, because the 245 and 335 sizes require very different wheel widths. The front-size range and rear-size range are separated by several inches of approved wheel width.

In practical terms, a 1998 Lamborghini owner should think of the original wheels as a matched staggered set rather than a group of four identical rims. The wheel intended for the 245/40R17 should stay with that front-size fitment, and the wider wheel intended for the 335/35R17 should stay with the rear-size fitment. If the car has aftermarket wheels, verify each wheel individually before mounting tires, even when the rim diameter remains 17 inches.

A 1998 Lamborghini should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment. Keep the tires properly inflated during storage and move the car periodically if possible so one contact patch does not carry the load for months at a time. Radial tires generally resist flat-spotting better than older bias-ply designs, but any low-profile performance tire can still develop temporary deformation when parked too long.

For a Diablo that sees seasonal use, storage habits matter nearly as much as mileage. A car left on underinflated tires in a bright or damp garage will age the rubber faster than one kept in a stable indoor environment. If the car will sit for an extended period, many collectors either roll it occasionally or use storage ramps or stands in a way that avoids stressing the same section of tire for months.

On a 1998 Lamborghini, tire age is usually a more important limit than tread wear. Collector vehicles often cover low annual mileage, so a tire can look usable while the rubber has already hardened or begun to age out. A sensible approach is to inspect tires closely after about five to seven years of service and to treat the ten-year mark as a serious replacement consideration regardless of remaining tread depth.

Checking the DOT date code is the best way to understand how old the tire really is, especially on a car that may have spent years in a collection. A Diablo’s performance character can mask age-related decline until braking, wet-road behavior, or high-speed stability reveal it. Even when the tread looks healthy, older tires deserve closer scrutiny if the car will be driven spiritedly or taken on longer highway trips.

Tires on a 1998 Lamborghini should be inspected before every drive and again before any extended outing. Look for sidewall cracking, punctures, bulges, uneven wear, low pressure, and signs that the tire has been rubbing or heat-cycled unevenly. Because the Diablo uses different front and rear sizes, inspect each axle as its own setup rather than assuming all four tires will age or wear the same way.

Regular inspection is especially important on a car that may spend long periods parked and then return to service at highway speed with little warning. Low-use collector cars often reveal problems at the sidewall, valve stem, or bead area before the tread itself looks worn out. A careful walk-around and pressure check before driving is one of the simplest ways to protect both the car and the expensive bodywork around it.

A 1998 Lamborghini Diablo belongs to an era when radial tires were standard equipment on high-performance exotic cars, so radial construction is the correct baseline for originality and proper road behavior. The Diablo uses a staggered 17-inch setup with 245/40R17 and 335/35R17 fitments in this application. That combination reflects late-1990s supercar practice, where wide rear tires were part of both the car’s appearance and its handling balance.

Owners pursuing factory-correct presentation should keep the focus on matching the right size, construction type, and overall sidewall appearance for the period rather than assuming any modern performance size will look right. Brand, market, and specification details could vary by region or delivery configuration, so marque specialists and Lamborghini club resources remain the best places to confirm car-specific originality. For most restorations, preserving the correct stagger and radial format is the essential first step.

Correct tire fitment does matter when showing a 1998 Lamborghini, especially on a Diablo where wheel-and-tire proportion is a visible part of the car’s identity. Judges and knowledgeable enthusiasts tend to notice whether the car has the proper staggered size relationship, correct radial construction for the era, and a sidewall appearance that suits a late-1990s exotic. An incorrect overall width or profile can change the car’s stance enough to be obvious even at a glance.

For serious presentation, the goal is to preserve the Diablo’s intended visual balance rather than merely filling the wheel openings. A mismatched front-to-rear relationship, an off-profile substitute, or a sidewall style that looks out of period can distract from an otherwise careful restoration. Event standards vary, so owners preparing for concours or marque judging should compare their tire choice against club guidance and period reference photos before final mounting.

In 245/40R17 for the 1998 Lamborghini Diablo, the BFGoodrich g-Force COMP-2 A/S and g-Force Phenom T/A differ in wheel-width range, speed rating, load information, and weight. The COMP-2 A/S fits 8.0 to 9.5-inch wheels and weighs 26 pounds, while the Phenom T/A fits 8 to 9.5-inch wheels and weighs 25.88 pounds. The Phenom T/A also carries a 95Y rating with a published maximum load of 1,521 pounds at 50 psi, while the COMP-2 A/S uses a 91W service description.

For a Diablo owner balancing authenticity and usability, that comparison is less about era styling and more about selecting a modern radial whose specifications suit the wheel and the car’s intended duty. Both maintain the correct blackwall, low-profile performance look, but the details separate them. If the car is being prepared for careful road use rather than static display, the best approach is to compare the actual wheel width and desired speed-rating range before deciding between the two.

Yes, the radial tires used on a 1998 Lamborghini Diablo can be appropriate for highway driving when they are the correct size, in good condition, properly inflated, and matched to the correct wheel width. The 245/40R17 choices include W and Y speed ratings, with W rated to 168 mph and Y rated above 186 mph. The 335/35R17 Michelin uses a ZR-format size marking associated with high-speed performance service, though the exact service description should be confirmed from the tire’s sidewall marking.

Real-world safety depends on more than the speed symbol. A 1998 Lamborghini is a low, powerful, highly responsive car, and factors like suspension condition, alignment, brake health, and tire age often matter more than theoretical top-speed capability during normal highway use. Before any sustained road trip, make sure the tires are fresh enough, the axle pair is evenly matched, and the car is mechanically ready for the kind of speeds and temperatures it may actually encounter.

Inflation pressure on a 1998 Lamborghini should follow the vehicle manufacturer’s recommendation first, with the tire maker’s published maximum pressure used only as a design limit rather than a default setting. In the 245/40R17 size, published load-and-pressure figures include 1,356 pounds at 51 psi for one BFGoodrich option and 1,521 pounds at 50 psi for another. Those numbers belong to those specific tires and should not be transferred to other sizes or assumed to be the correct running pressure for every Diablo setup.

The practical approach is to start with the pressure recommendation for your exact Diablo configuration, then confirm that the chosen tire is carrying the load it needs within its own rated range. Front and rear pressures may differ because the car uses staggered tire sizes and a rear-biased performance layout. If the owner’s manual or door-jamb information and the tire sidewall appear to point to different purposes, remember that the vehicle recommendation is the running target while the sidewall figure reflects the tire’s maximum rated condition.

Before taking a 1998 Lamborghini on a longer drive, inspect every tire for cracking, cuts, bulges, punctures, uneven wear, and proper cold inflation pressure. Verify that the 245/40R17 and 335/35R17 sizes are mounted in the correct positions, and check valve stems for age or leakage. The spare, if equipped, deserves the same attention because a long-stored emergency tire can age out just like the primary set.

A Diablo should also be treated as a full systems check rather than a tire-only exercise. On a car of this age and performance level, alignment, brakes, suspension bushings, fluid condition, and cooling-system health all influence how safely the tires can do their job once the road opens up. If anything about the tire’s age, pressure retention, or wheel fit looks questionable, resolve that first and treat the drive as secondary.