2007 Infiniti Tire Fitment Guide

2007 Infiniti vehicles use eight sizes across three models: 225/40R19, 245/40R19, 225/50R17, 235/50R17, 225/45R18, 245/45R18, 225/55R17, and 225/50R18. The G35 uses all eight depending on wheel package, while the M35 and M45 use 245/45R18 or 245/40R19. Rim width ranges vary by size, including 6.0 to 8.0 inches for 225/50R17, 7.0 to 8.5 inches for 225/45R18, 7.5 to 9.0 inches for 245/45R18, and 8.0 to 9.5 inches for 245/40R19.

That means a 2007 Infiniti buyer should start by identifying the exact model and wheel diameter, then confirm the tire size already on the car or called for on the placard. The G35 especially can wear several different sizes, so a quick visual check of the current tire code is often the fastest way to avoid choosing the wrong 17-, 18-, or 19-inch replacement.

On a 2007 Infiniti, 225/45R18 means the tire is 225 millimeters wide, has a 45-series aspect ratio, uses radial construction, and fits an 18-inch wheel. That size appears on the G35 and follows the modern metric radial format used throughout the 2007 Infiniti range. Products in this size come in Blackwall form and fit rim widths from 7.0 to 8.5 inches.

The practical value of reading the code correctly is that it tells you far more than width alone. A 225/45R18 cannot be swapped casually with a 225/50R18 or 245/45R18 just because the wheel diameter is similar, since sidewall height and section width change. Matching the complete code keeps the tire aligned with the intended wheel and overall fitment profile.

No, 2007 Infiniti models do not all use the same tire size. The M35 and M45 share two sizes, 245/45R18 and 245/40R19, while the G35 spans a much wider range of 17-, 18-, and 19-inch fitments, including several 225-section and 235-section options. Even within the G35 line, tire size changes with wheel package and configuration.

That difference matters because tire selection for a 2007 Infiniti is model-specific and often wheel-specific. If you know only the year and make, you are still one step short of a confident match. The best path is to confirm the model first, then verify the exact size on the sidewall or the vehicle placard before comparing brands and product series.

Most 2007 Infiniti tire sizes are available as Blackwall radials, which suits the factory-era appearance of a mid-2000s Infiniti sport sedan. The one sidewall variation appears in 225/55R17 for the G35, where both Blackwall and Wide Whitewall options exist. That makes 225/55R17 the only size in this range with a noticeably different visual presentation.

For a stock-looking 2007 Infiniti, Blackwall is the natural choice because it matches the original market character of the G35, M35, and M45. A Wide Whitewall version changes the car's visual message substantially and is more of a custom styling decision than an authenticity play. If appearance matters as much as fitment, sidewall style should be chosen as deliberately as the size itself.

BFGoodrich covers every 2007 Infiniti size in this range, while Nitto appears in 225/50R17, 225/45R18, and 245/45R18. BFGoodrich offerings include g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and in one G35 size, a Silvertown Radial with a Wide Whitewall sidewall treatment. Nitto appears with the NT555 G2 in selected 17- and 18-inch fitments.

That mix gives buyers a straightforward way to narrow choices once the size is confirmed. If your 2007 Infiniti uses one of the shared 18-inch or selected 17-inch sizes, you can compare more than one brand. If it uses a more specialized G35 fitment such as 225/40R19 or 235/50R17, brand choice is narrower, so confirming the exact size becomes even more important before you compare tread design or speed rating.

For several 2007 Infiniti sizes, BFGoodrich offers both g-Force Comp 2 AS and g-Force Phenom T/A, and the most visible differences are service rating and load figures where those figures appear. In 245/40R19, the Comp 2 AS appears as a 94W tire while the Phenom T/A carries a 98Y rating with a 1,653-pound load figure at 50 psi. In 245/45R18, the Comp 2 AS appears as a 96W tire while the Phenom T/A reaches 100Y with a 1,764-pound load figure at 50 psi.

That does not automatically make one the right answer for every 2007 Infiniti owner, but it does show that products within the same size can differ in rating and carrying capacity. Buyers comparing two tires with the same basic dimensions should read the full sidewall code and service description, not just the size. Matching the tire to your intended use and wheel package is more useful than judging by series name alone.

Rim width depends on the specific tire size used on the 2007 Infiniti. 225/50R17 and 225/55R17 fit rims from 6.0 to 8.0 inches, while 235/50R17 fits 6.5 to 8.5 inches. In the 18-inch range, 225/45R18 fits 7.0 to 8.5 inches, 225/50R18 fits 6.0 to 8.0 inches, and 245/45R18 fits 7.5 to 9.0 inches. For 19-inch applications, 225/40R19 fits 7.5 to 9.0 inches and 245/40R19 fits 8.0 to 9.5 inches.

Those ranges matter because a tire can share the correct diameter but still be wrong for the wheel's width. If a 2007 Infiniti has aftermarket wheels, verifying the actual wheel width before ordering is just as important as confirming the tire code. Staying within the approved rim-width range helps preserve the intended shape of the tire and keeps the fitment closer to what the manufacturer designed.

The 2007 Infiniti sizes here are modern radial fitments with service descriptions such as 225/45ZR18, 245/45ZR18, and 245/40ZR19, and they are presented as contemporary tubeless-style passenger tires rather than tube-type specialty constructions. No tube-type marking appears within these size offerings, and the overall fitment pattern matches modern late-model wheel and tire practice.

For most buyers, that means the focus should be on wheel condition, valve stems, and bead seating rather than planning for tubes. Even so, a 2007 Infiniti with replacement wheels or prior modifications deserves a careful inspection before mounting new tires. Confirming that the wheel is appropriate for tubeless radial use is a smart final check whenever the car's wheel history is uncertain.

Original 2007 Infiniti wheels can only be used with tire sizes that match their diameter and width range. A 17-inch wheel must stay with a 17-inch tire, an 18-inch wheel with an 18-inch tire, and a 19-inch wheel with a 19-inch tire. Width ranges also matter, since a 245/40R19 expects a broader wheel range than a 225/50R17.

That means not every 2007 Infiniti size is interchangeable just because it came on the same model family. The G35 is the clearest example, since it spans several diameters and profiles. If you are trying to reuse original wheels, confirm the wheel diameter and width first, then choose only from the tire sizes that fall within those dimensions rather than cross-shopping the entire year-make range.

A 2007 Infiniti stores best in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment. Keep the tires clean, maintain proper inflation, and avoid letting the car sit for long periods on damp ground. Because every fitment here is a radial, regular movement still helps, but prolonged static storage is generally less punishing than it can be for older bias-ply designs.

Owners who park a 2007 Infiniti for weeks or months at a time should move the car periodically or support it appropriately to reduce stress concentration in one contact patch. Indoor climate control is helpful, but simple discipline matters more: stable inflation pressure, protection from UV exposure, and a storage area free of heat swings and ozone sources will do more for tire longevity than occasional cosmetic cleaning.

Tire life on a 2007 Infiniti should be judged by age and condition as much as tread depth. A collector or lightly used car can age out its tires before it wears them out, so a close evaluation around the five- to seven-year mark is wise, and replacement becomes a serious consideration as tires approach about ten years from the DOT date code. Heat, storage conditions, and inflation history all influence the outcome.

That matters especially on a 2007 Infiniti because these cars are capable enough to expose the weaknesses of an old tire even during normal street driving. A tire that still looks respectable can lose flexibility and grip as it ages. Reading the date code and inspecting for cracks, hardening, and irregular wear gives a more realistic picture than mileage alone on a low-use modern classic.

Tires on a 2007 Infiniti should be inspected before every drive and again before any longer highway trip. Look for pressure loss, cuts, sidewall cracking, tread damage, punctures, bulges, and uneven wear, especially on cars that have been parked for extended periods. A quick walk-around takes only a minute and can catch the kind of age-related issue that does not show up in casual driving around town.

A more thorough inspection every few months is also worthwhile, including checking valve stems and examining the inner sidewall when the wheel design allows it. Performance-oriented sedans such as the G35, M35, and M45 can mask tire aging until speed or load increases. Making inspection a routine habit is one of the simplest ways to protect both the car and the driving experience.

Yes, the 2007 Infiniti tire sizes here are modern radial designs with W and Y service ratings depending on the product. W-rated tires are rated to 112 mph, while Y-rated tires are rated to 186 mph. In practical terms, that places these tires well within normal U.S. highway use when they are correctly sized, properly inflated, and in sound condition.

The real safety question for a 2007 Infiniti is usually condition, age, and correct fitment rather than headline speed capability. Even a highly rated tire cannot compensate for old rubber, damage, or a mismatched wheel. Before any sustained highway use, confirm the exact tire size, inspect the sidewalls and tread, and make sure the car's suspension and alignment are supporting the tire properly.

Inflation pressure for a 2007 Infiniti should follow the vehicle placard or owner's manual for the factory recommendation, while the tire's own maximum pressure and load figure should be read as the tire's rated upper limit rather than a universal running pressure. Several sizes here carry load figures at 50 or 51 psi, including 225/40R19 at 1,433 pounds at 50 psi, 245/40R19 at 1,653 pounds at 50 psi, 245/45R18 at up to 1,764 pounds at 50 psi, and 225/55R17 at up to 1,819 pounds at 50 psi.

Those figures should not be transferred from one size to another or treated as a blanket setting for every 2007 Infiniti. The correct everyday pressure depends on the specific model, wheel package, load carried, and the factory chassis tuning. Use the car's recommendation as the baseline, then confirm that the chosen tire's service description and pressure capacity are appropriate for that application.

A longer drive in a 2007 Infiniti should start with a full tire inspection: verify cold inflation pressure, inspect tread and sidewalls for cracking or cuts, check for bulges, and make sure there is no unusual wear pattern that suggests alignment or suspension issues. The spare, if present, deserves the same attention, since a neglected spare can turn a minor problem into a trip-ending one.

Tires are only one part of the pre-drive routine on a car of this age, but they are the easiest place to spot trouble early. Once the tires are confirmed, it is wise to look over brakes, fluids, battery condition, and any signs of suspension looseness. A 2007 Infiniti in good mechanical shape can still feel modern on the road, and careful preparation helps it stay that way.