The 2006 Infiniti Trucks FX45 came from a period when performance-oriented luxury SUVs were becoming more aggressive in both styling and road manners. Its long-hood proportions and sport-focused character made tire fitment especially important, because the vehicle depends on a substantial wheel-and-tire package to deliver the stance and handling it is known for. This model uses a 265/50R20 radial tire on a 20-inch rim, so the main decision is not which primary size fits, but which tire within that size best suits the vehicle. The right choice comes down to construction consistency, road-use priorities, and careful confirmation of wheel and clearance compatibility.
Which Tire Size Is Right for The 2006 Infiniti Trucks FX45
The 2006 Infiniti Trucks FX45 uses one primary tire size: 265/50R20, and it is a radial fitment on a 20-inch rim. The FX45 Base uses that same size, so the main choice is selecting the right tire within the correct fitment while confirming the actual wheel setup on the vehicle if it has been modified.
A 265/50R20 size uses a 265-millimeter nominal section width, a 50-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2006 Infiniti Trucks FX45, that modern metric radial format matches the vehicle’s original fitment style and supports its sport-oriented SUV character. For buyers, the decision is less about decoding an antique or vintage size system and more about staying with the correct dimensions, load capability, and wheel compatibility. It is also important to confirm that the vehicle still has the proper 20-inch wheels and that no suspension or wheel changes have altered the fitment requirements.
Fitment is straightforward for the covered 2006 Infiniti Trucks FX45 sub-model. The main thing to verify is that the vehicle still retains its proper wheel and tire setup, especially if it has seen aftermarket wheel, suspension, or appearance changes.
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2006 Infiniti Trucks FX45 Base
The 2006 Infiniti Trucks FX45 Base uses the same 265/50R20 radial fitment found on the model core. That makes tire selection more about choosing the right tire characteristics within the correct size and confirming that the current wheels remain true to the original 20-inch fitment.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Frequently Asked Questions
These FAQs focus on the 2006 Infiniti Trucks FX45 tire size, 20-inch rim fitment, product-selection priorities, and the wheel, suspension, and maintenance checks that matter before regular road use.
Tire Size & Fitment
What tire size fits a 2006 Infiniti Trucks FX45?
The 2006 Infiniti Trucks FX45 uses a 265/50R20 tire. That is a modern metric radial size, and it is the primary fitment for this model.
Because there is one main size for the FX45, the key step is confirming that the vehicle still has the correct 20-inch wheels and an unaltered setup. If the SUV has aftermarket wheels, suspension changes, or body modifications, check wheel width, clearance, and overall tire dimensions before choosing a replacement.
What size rim does a 2006 Infiniti Trucks FX45 use?
The 2006 Infiniti Trucks FX45 uses a 20-inch rim with its 265/50R20 tire size. That rim diameter is part of the tire size itself, with the final number indicating the wheel diameter in inches.
Matching the 20-inch diameter is only the starting point. It is also smart to verify the actual wheel width and overall wheel setup on the vehicle, especially if the FX45 has been changed from stock. A tire may share the same rim diameter but still require closer checking for proper fit and clearance.
Does the 2006 Infiniti Trucks FX45 Base use the same tire size?
Yes. The 2006 Infiniti Trucks FX45 Base uses the same 265/50R20 radial tire size as the model core. That keeps fitment simple across the covered FX45 configuration.
Even with shared fitment, it is still worth checking what is actually on the vehicle today. A previous owner may have changed wheels or suspension height, and that can affect replacement choices. Staying with the correct tire size is the safest starting point before comparing tire features, construction details, and road-use priorities.
Choosing the Right Tire
What should I consider when choosing a 265/50R20 tire for a 2006 Infiniti Trucks FX45?
Start with the correct 265/50R20 size and confirm that the tire is appropriate for the FX45’s 20-inch wheel setup. Since this model uses a radial fitment, the biggest selection factors are proper dimensions, load suitability, and how the tire matches the vehicle’s intended road use.
It also helps to think about how the SUV is driven today. A lightly used weekend vehicle may have different priorities than one that sees regular highway miles. Check the current wheel setup, compare tire specifications carefully, and avoid assuming that any tire in the same nominal size will suit every modified or non-stock FX45.
How do I choose between the available 265/50R20 tires for a 2006 Infiniti Trucks FX45?
The best way to compare 265/50R20 tires for a 2006 Infiniti Trucks FX45 is to begin with fitment basics, then look at the specifications that affect use. Tire dimensions, construction consistency, and load-related details matter more than cosmetic differences alone.
Once the fitment is confirmed, consider how closely the tire matches the vehicle’s current setup and driving needs. An FX45 with factory-style wheels and suspension may call for a different selection approach than one with custom wheels or stance changes. Looking at the full specification picture helps narrow the field without turning the choice into guesswork.
What rim-width specifications should I compare when choosing 2006 Infiniti Trucks FX45 tires?
Rim width matters because a 265/50R20 tire is designed to work within an appropriate wheel-width range, not simply on any 20-inch rim. The correct wheel width helps the tire maintain its intended shape, contact patch, and overall fitment behavior.
That becomes especially important if the 2006 Infiniti Trucks FX45 no longer wears its original wheels. A wheel can have the right diameter but still be too narrow or too wide for the tire being considered. Checking rim width along with offset and clearance helps prevent fitment problems that a simple size match may not reveal.
Restoration & Appearance
Which tire should I choose for a period-style 2006 Infiniti Trucks FX45?
A period-style approach for a 2006 Infiniti Trucks FX45 starts with the correct 265/50R20 size and radial construction. That keeps the vehicle aligned with the dimensions and general fitment character it used when new, which is especially important on a design-driven performance SUV.
Appearance still depends on the exact wheel and tire presentation on the vehicle today. If originality matters, compare the current setup against owner literature, marque references, or period photos before making a final choice. Keeping the proper size and overall stance usually does more for the FX45’s visual character than chasing a purely cosmetic change.
Does correct tire fitment matter for a 2006 Infiniti Trucks FX45 restoration?
Yes, correct tire fitment matters on a 2006 Infiniti Trucks FX45 because the vehicle’s appearance and road presence rely heavily on its wheel-and-tire proportions. The proper 265/50R20 size helps preserve the intended relationship between the body, wheel openings, and 20-inch wheels.
Fitment also affects more than looks. A tire that changes the vehicle’s overall presentation or sits differently on the wheel can alter how finished the restoration feels. Even on a newer collector SUV, confirming size, wheel compatibility, and stance is part of getting the vehicle to look cohesive and road-ready.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2006 Infiniti Trucks FX45?
Yes. Modifications can change tire fitment on a 2006 Infiniti Trucks FX45 even when the replacement tire remains close to the original 265/50R20 size. Aftermarket wheels, altered offsets, suspension lowering, or body changes can all affect how much room the tire has during steering and suspension travel.
That is why the current vehicle setup matters as much as the catalog size. Check wheel diameter, wheel width, and clearance at the fender, inner wheelhouse, and suspension components before settling on a tire. A modified FX45 may need more careful measurement than a stock example using the same nominal size.
What should I inspect before driving a 2006 Infiniti Trucks FX45 on new tires?
Before driving a 2006 Infiniti Trucks FX45 on new tires, inspect the wheels for damage, confirm the tire size matches 265/50R20, and make sure inflation is set correctly for the application. It is also wise to check for suspension wear, alignment issues, and any signs that the old tires were rubbing or wearing unevenly.
A short test drive should include attention to steering feel, vibration, and clearance during turns and over bumps. Looking over the wheel wells afterward can reveal contact marks that were not obvious during installation. Catching those issues early helps protect both the tires and the vehicle’s body and suspension components.
How often should tires on a 2006 Infiniti Trucks FX45 be inspected?
Tires on a 2006 Infiniti Trucks FX45 should be inspected regularly, not just when tread looks low. Collector-owned or lightly driven SUVs can develop age-related issues such as cracking, flat spotting, or air loss even when the miles are limited.
A practical routine is to check tires before longer drives and to give them a visual inspection during normal maintenance intervals. Look for cuts, bulges, uneven wear, embedded debris, and signs of sidewall aging. Keeping inflation consistent and storing the vehicle away from prolonged sunlight and ozone sources also helps preserve tire condition.
