2008 Infiniti Trucks Tire Fitment Guide

2008 Infiniti Trucks vehicles use five tire sizes across four models: 225/60R17 and 225/55R18 for the EX35, 265/50R20 and 265/60R18 for the FX35, 265/50R20 for the FX45, and 275/60R20 for the QX56. Every size is a radial, but the wheel diameters differ, covering 17-, 18-, and 20-inch applications rather than one common fitment for the whole Infiniti truck range.

That means the first fitment question is your exact model, followed by the wheel diameter actually on the vehicle. An EX35 owner may need either a 17- or 18-inch tire, while an FX35 owner may need an 18- or 20-inch fitment, and the QX56 stands on its own with a 275/60R20. If the vehicle has changed hands or had wheels swapped at some point, verify the sidewall size on the current tire and compare it with the wheel before ordering replacements.

On a 2008 Infiniti Trucks EX35, 225/60R17 means the tire is 225 millimeters wide, has a 60-series aspect ratio, uses radial construction, and fits a 17-inch wheel. The final number is the wheel diameter, so this size belongs only on a 17-inch rim. Travelstar offers this size with a 99T service description, which corresponds to a 118 mph speed ceiling and a 1,709-pound maximum load at 44 psi.

For an EX35 owner, that code matters because the same model year also used 225/55R18, which looks similar at a glance but requires a different wheel. The most common mistake is focusing on width alone and missing the rim diameter. If your EX35 has factory-style 17-inch wheels, 225/60R17 is the size family to pursue; if it has 18s, this is not the correct fitment even though the first number remains 225.

No. 2008 Infiniti Trucks models do not share one universal tire size. The EX35 uses 225/60R17 or 225/55R18, the FX35 uses 265/50R20 or 265/60R18, the FX45 uses 265/50R20, and the QX56 uses 275/60R20. Only the 265/50R20 overlaps between models, and that shared size applies to the FX35 and FX45 rather than the full lineup.

That matters because an owner who knows only the year and make can still end up in the wrong part of the fitment range. Infiniti's 2008 truck and crossover lineup spans compact, midsize, and full-size platforms, so tire sizing follows the model's role and wheel package. If you are unsure which Infiniti you have, confirm the model badge or VIN first, then use the tire size already on the vehicle as a cross-check before choosing a replacement.

Sidewall style availability for 2008 Infiniti Trucks depends on the size. In 225/60R17, Travelstar offers a narrow whitewall, which gives the EX35 a more distinctive appearance than a plain blackwall radial. No broader sidewall range appears across the other 2008 Infiniti Trucks sizes here, so sidewall choice is much more limited than it would be on a mid-century collector car application.

For most 2008 Infiniti buyers, sidewall style is more about visual preference than strict restoration authenticity, since these are modern-era luxury crossovers and SUVs rather than bias-ply-era classics. Even so, the sidewall should still match the look you want from the vehicle. If an EX35 owner prefers a cleaner OEM-style appearance, it is worth comparing the current tires on the vehicle against the replacement's sidewall treatment before making a final decision.

Travelstar is represented in the 2008 Infiniti Trucks range through the 225/60R17 size used on the EX35. That product is a radial in the UN106 series and comes with a narrow whitewall treatment. Because 2008 Infiniti Trucks uses several model-specific sizes, brand availability can differ depending on whether you are fitting an EX35, FX35, FX45, or QX56 application.

Brand selection should come after the fitment basics are settled. A buyer with an EX35 on 17-inch wheels can look directly at the Travelstar option in 225/60R17, while buyers with 18- or 20-inch Infiniti applications should start by confirming the exact size before comparing brands. That approach keeps the search focused on tires that actually match the wheel diameter and intended use of the specific model.

The right tire for a 2008 Infiniti Trucks model starts with matching the model and wheel diameter, because the lineup uses five different radial sizes across four vehicles. EX35 owners are in the 225-width family on 17- or 18-inch wheels, FX35 owners may need either an 18- or 20-inch fitment, FX45 owners use 265/50R20, and QX56 owners use 275/60R20. The key is that size choice here is about correct fitment, not choosing between bias-ply and radial constructions.

Once the size is confirmed, then it makes sense to compare details such as sidewall appearance, speed rating, and load capacity. That order matters more on a mixed lineup like 2008 Infiniti Trucks than on a year-make page where every model shares one tire size. If the wheels are not original to the vehicle, inspect the sidewall of the current tire and verify the wheel diameter directly so you do not accidentally order a tire that fits the model in theory but not the wheels on the vehicle today.

For 2008 Infiniti Trucks, rim width information is available for the 225/60R17 size used on the EX35, where the wheel specification is 6.5J. That size also uses a 17-inch rim diameter, which is the first fitment point to confirm. The other 2008 Infiniti Trucks sizes here are tied to 18- or 20-inch diameters by their size codes, but the wheel-width figure is not the same thing as diameter and should be checked directly against the actual wheel.

Rim width matters because it affects how the tire sits on the wheel and how the sidewall presents once inflated. Even when the diameter is correct, the wheel still needs to be appropriate for the tire. If you are working with an EX35 in 225/60R17, the 6.5J wheel spec gives you a concrete reference point. For the other Infiniti applications, confirm the wheel stamping or consult the vehicle's wheel information before assuming compatibility beyond the diameter shown in the tire code.

The 225/60R17 tire used on the 2008 Infiniti Trucks EX35 is offered as a tubeless radial, so an inner tube is not part of that setup. No tube-type markings appear in that size, and that matches what most modern metric radial SUV and crossover tires use. The other 2008 Infiniti Trucks sizes on this page are also modern radial fitments, so the normal expectation is a tubeless wheel-and-tire system rather than a tube-type collector setup.

The practical check is the wheel itself. A modern tubeless tire still needs a sound wheel bead seat and a healthy valve stem to hold air correctly. If the wheel is damaged, corroded, or has been refinished poorly, air retention can suffer even with the right tire. Before installation, inspect the rim condition, replace aging valve stems, and confirm the tire's sidewall marking so the wheel, valve hardware, and tire all work together as intended.

A 2008 Infiniti Trucks vehicle should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, battery chargers, and other ozone-producing equipment. Radial tires generally tolerate sitting better than old bias-ply constructions, but they still age from heat, ultraviolet exposure, and long static loads. Keeping the tires at proper inflation and moving the vehicle periodically helps reduce flat spotting and sidewall stress.

If the vehicle will sit for an extended season, clean the tires, set pressures correctly, and park on a clean surface rather than bare soil. Some owners also use tire cradles or stands to reduce load concentration during longer storage. That is especially worthwhile on heavier applications such as the QX56, where static weight can be substantial. A few minutes of storage prep goes a long way toward preserving sidewall condition and ride quality when the Infiniti returns to regular road use.

On a 2008 Infiniti Trucks vehicle, tire life should be judged as much by age as by remaining tread depth. For low-mile collector, spare, or secondary-use vehicles, many owners begin evaluating tire age closely around five to seven years and treat about ten years as a serious replacement point regardless of tread. The DOT date code on the sidewall gives the week and year of manufacture, which is the most useful starting point for that decision.

That matters because a luxury crossover or SUV can appear to have plenty of tread and still be aging out structurally. Sidewall cracking, hardening rubber, vibration, and reduced wet-weather confidence often show up before the tread looks worn. A 2008 Infiniti that is driven occasionally rather than daily is especially prone to aging before it wears out. Reading the date code and pairing it with a careful visual inspection gives a much better picture than mileage alone.

Tires on a 2008 Infiniti Trucks vehicle should be inspected before every drive, with a more thorough check before any longer highway trip. Look for visible cracking, cuts, bulges, uneven wear, punctures, and any sign that a tire has been run underinflated. Pressure should be checked regularly with the tires cold, since even a modern radial can lose enough air over time to affect handling, braking feel, and tread wear.

A monthly inspection schedule works well for a vehicle that sits often, while a quick walkaround is smart every time the Infiniti comes out of the garage. Pay extra attention to the inner sidewalls if the vehicle has curb-contact history or aggressive wheel designs that can hide damage. If the tires have been in place for several years, have them inspected on a lift occasionally so the entire tread and bead area can be evaluated, not just the portion visible at ground level.

2008 Infiniti Trucks tires are highway-capable when the tire's condition, inflation, load range, and speed rating all suit the vehicle and how it is being used. In the 225/60R17 EX35 application, the available Travelstar radial carries a T speed rating, which corresponds to 118 mph. That ceiling is well above normal U.S. highway travel, but real-world safety still depends on tire age, structural condition, alignment, braking condition, and the mechanical health of the vehicle itself.

For a modern-era Infiniti crossover or SUV, tire condition is often a bigger safety factor than the speed symbol printed on the sidewall. A fresh, correctly inflated radial in the proper size is far more reassuring than an aged tire with good tread but hidden deterioration. Before any sustained highway run, confirm pressures cold, inspect for cracking or bulges, and make sure the tires on the vehicle match in size and service class across each axle.

Inflation pressure for 2008 Infiniti Trucks should follow the vehicle manufacturer's recommendation for the exact model and wheel package, then be checked against the tire's own sidewall information. In the 225/60R17 EX35 fitment, the available radial carries a maximum load of 1,709 pounds at 44 psi, but that figure is the tire's rated maximum rather than a blanket operating pressure for every driving condition. Pressure should always be matched to the specific vehicle application and use.

That distinction is important because sidewall maximum pressure and factory vehicle placard pressure are not interchangeable numbers. The placard or owner's manual gives the intended operating target for ride, wear, and handling on the original application, while the sidewall shows the tire's maximum rated pressure. Use the vehicle recommendation as the baseline, check pressures cold, and do not transfer one size's pressure assumption to another Infiniti model or wheel package from the same year.

Before taking a 2008 Infiniti Trucks vehicle on a longer drive, inspect each tire for sidewall cracking, punctures, tread damage, bulges, and uneven wear, then confirm cold inflation pressure. Check the spare as well, since a neglected spare is a common weak point on low-use SUVs and crossovers. A longer trip is also a good time to look over valve stems, wheel condition, and tread depth across the full contact patch rather than just the outer edge.

Tires are only one part of the broader pre-drive check on a vehicle of this age. Brakes, fluids, battery condition, and suspension components all matter, especially on heavier models such as the QX56 or sport-oriented FX variants that may spend long stretches parked between outings. If the Infiniti has sat for months, drive it briefly at lower speed first to feel for vibration or pull before committing to interstate miles. That quick shakedown can reveal age-related tire issues early.