The 2014 Lexus Trucks RX350 sits in the mature luxury-crossover phase of the RX line, blending car-like road manners with the ride height and everyday usefulness that made the model so widely recognized. Buyers looking at this exact RX350 usually are not chasing a vintage-style bias-ply decision, but a precise modern fitment decision tied to wheel size and sub-model. This RX350 uses radial tires in either 235/60R18 or 235/55R19, depending on configuration. That makes the key choice less about construction and more about confirming whether the vehicle is on 18-inch or 19-inch wheels, then selecting a tire that matches the intended balance of appearance, ride, and normal road use.
Which Tire Size Is Right for The 2014 Lexus Trucks RX350
Two tire sizes apply to the 2014 Lexus Trucks RX350, and the first thing to confirm is wheel diameter. The RX350 uses either 235/60R18 or 235/55R19 radial tires, with fitment varying by sub-model and wheel setup. Before comparing tire choices, make sure the vehicle is on the correct 18-inch or 19-inch rim and that the current wheels match the specific RX350 configuration.
A 235/55R19 tire uses a 235-millimeter section width, a 55-series aspect ratio, radial construction, and a 19-inch rim diameter. On the 2014 Lexus Trucks RX350, this is one of the primary fitments and it is also the size used by the F Sport sub-model. Its overall dimensions stay close to the 18-inch alternative, but the smaller sidewall and larger wheel diameter make wheel confirmation especially important. Choose this size when the RX350 is equipped with 19-inch wheels and the goal is to keep the fitment aligned with that setup.
A 235/60R18 tire keeps the same 235-millimeter section width as the 19-inch option, but it uses a 60-series sidewall on an 18-inch rim. For the 2014 Lexus Trucks RX350, this size applies to Base models equipped with 18-inch wheels. The similar width and overall diameter can make the two RX350 sizes look closely related, but they are built around different wheel diameters and should not be treated as interchangeable without checking the wheel itself. This is the size to evaluate when the vehicle retains its 18-inch wheel package.
Sub-model fitment matters on the 2014 Lexus Trucks RX350 because wheel and tire sizing is not the same across every version. The Base model can use either of the two primary sizes, while the F Sport uses the 19-inch fitment, so identifying the exact sub-model and wheel setup comes first.
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2014 Lexus Trucks RX350 Base
The 2014 Lexus Trucks RX350 Base can use either of the two primary radial tire sizes, so the actual wheel diameter on the vehicle needs to be confirmed before choosing a replacement. Tire selection here starts with the 18-inch versus 19-inch wheel question, then moves to matching the intended ride, appearance, and everyday road use.
The 2014 Lexus Trucks RX350 F Sport uses the 235/55R19 radial fitment, which ties it to a 19-inch wheel package. That makes the buying decision more straightforward, with attention focused on keeping the correct size while verifying the current wheels and any changes made since the vehicle left stock form.
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
Common questions for the 2014 Lexus Trucks RX350 usually center on which of the two radial sizes applies, how sub-model fitment differs, and what to inspect before replacing tires on 18-inch or 19-inch wheels.
Tire Size & Fitment
What tire size fits a 2014 Lexus Trucks RX350?
The 2014 Lexus Trucks RX350 uses two primary radial tire sizes: 235/60R18 and 235/55R19. Both sizes belong to this exact model year and model line, but they do not apply the same way across every configuration because the RX350 was fitted with more than one wheel diameter.
The practical next step is to verify which wheels are actually on the vehicle before ordering tires. A Base model may be on 18-inch or 19-inch wheels, while the F Sport uses the 19-inch size, so checking the tire sidewall and measuring the wheel setup already on the RX350 will prevent choosing the wrong rim-diameter fitment.
What size rim does a 2014 Lexus Trucks RX350 use?
A 2014 Lexus Trucks RX350 uses either an 18-inch or 19-inch rim, depending on the tire size fitted to the vehicle. The 235/60R18 tire mounts on an 18-inch rim, while the 235/55R19 tire mounts on a 19-inch rim.
Rim diameter should be confirmed before anything else because these two tire sizes are built for different wheels even though their overall proportions are close. Looking only at tread width is not enough. Check the sidewall size already on the RX350 and confirm the wheel itself, especially if the vehicle has had aftermarket wheels or prior tire replacements.
Do all 2014 Lexus Trucks RX350 sub-models use the same tire size?
No. The 2014 Lexus Trucks RX350 does not use one universal tire size across all covered sub-models. The Base model can use either 235/60R18 or 235/55R19, while the F Sport uses 235/55R19.
That difference matters because the tire decision starts with identifying both the sub-model and the wheel package on the vehicle. A Base RX350 may share the same 19-inch size as the F Sport, but it may also be on 18-inch wheels. Confirming the exact setup first will narrow the choice to the correct radial size and avoid a rim-diameter mismatch.
Choosing the Right Tire
What should I consider when choosing a tire for a 2014 Lexus Trucks RX350?
Start with the correct size for the wheel on the vehicle: 235/60R18 for an 18-inch setup or 235/55R19 for a 19-inch setup. Since both RX350 fitments are radial, the main selection issue is not bias-ply versus radial, but matching the tire to the vehicle's actual wheel diameter and configuration.
After confirming size, compare tires based on how the RX350 is used and whether it remains stock. Everyday driving, seasonal weather, ride expectations, and any wheel changes all matter. It is also smart to inspect the current tires for even wear, because unusual wear patterns can point to alignment or suspension issues that should be corrected before new tires go into service.
How do I choose between the available 2014 Lexus Trucks RX350 tire sizes?
You do not choose between 235/60R18 and 235/55R19 as styling alternatives alone; you choose the one that matches the wheel diameter already on the RX350. The two sizes are both valid for this model line, but they are tied to different rim sizes and sub-model configurations.
The best approach is to confirm whether the vehicle is a Base or F Sport, then verify the actual wheels currently installed. A Base model can be on either fitment, so trim name by itself is not always enough. Reading the existing sidewall and checking the wheel diameter will keep the replacement process aligned with the vehicle's real setup.
How do I choose between the available radial tires for a 2014 Lexus Trucks RX350?
For the 2014 Lexus Trucks RX350, the first filter is always the correct radial size for the wheel: 235/60R18 or 235/55R19. Once that is settled, the comparison becomes more about intended use, road manners, and maintaining a tire that suits a luxury crossover rather than chasing a vintage construction or appearance goal.
Look at the vehicle's current condition and use pattern before making the final choice. A mostly stock RX350 driven in normal street use may simply need the proper size restored, while a vehicle with changed wheels or suspension may need closer fitment review. Checking wheel diameter, wear patterns, and clearance will help narrow the right replacement path.
Restoration & Appearance
Does correct tire fitment matter for a 2014 Lexus Trucks RX350 restoration or preservation project?
Yes. Even though the 2014 Lexus Trucks RX350 is a modern vehicle rather than a classic bias-ply application, correct tire fitment still matters for a clean, proper presentation. Using the correct 235/60R18 or 235/55R19 size keeps the wheel and tire relationship consistent with the vehicle's intended setup.
For an RX350 being preserved in stock form, attention should stay on retaining the correct rim diameter and overall fitment rather than introducing a different wheel package without a reason. Since the Base model can appear with either size, the actual wheels on the vehicle should guide the choice. That keeps the stance and appearance coherent without making unsupported originality claims.
How does tire size affect the appearance of a 2014 Lexus Trucks RX350?
Tire size affects the visual balance of the 2014 Lexus Trucks RX350 because 235/60R18 and 235/55R19 pair the same width with different wheel diameters and sidewall proportions. The 19-inch fitment shows more wheel and a shorter sidewall, while the 18-inch fitment carries more sidewall around the rim.
That difference is subtle enough that some owners focus only on width, but the wheel diameter changes the overall presentation of the vehicle. For an RX350 kept close to stock appearance, matching the tire to the existing wheel package is the cleanest approach. Any move away from the original wheel setup should be checked for clearance and visual balance before committing.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Lexus Trucks RX350?
Yes. Modifications can affect tire fitment on a 2014 Lexus Trucks RX350 even when the tire size seems close to stock. Aftermarket wheels, changes in wheel offset, suspension lowering, or body alterations can change how a 235/60R18 or 235/55R19 tire sits in the wheel opening and how much clearance remains during steering and suspension travel.
A modified RX350 should be checked more carefully than a stock vehicle before replacement tires are chosen. Confirm the actual wheel diameter and width, inspect inner and outer clearance, and look for rubbing marks on liners or suspension parts. That extra review is especially important when moving between wheel packages or replacing tires on a vehicle with non-stock ride height.
What should I inspect before driving a 2014 Lexus Trucks RX350 on new tires?
Before driving a 2014 Lexus Trucks RX350 on new tires, inspect the wheels for damage, confirm that all four tires match the intended size, and check inflation pressure. It is also worth looking at alignment-related wear on the old tires, because uneven shoulder or center wear can point to issues that new tires alone will not correct.
A quick road-use review should also include valve stems, lug hardware, and basic clearance at full steering lock. The RX350 may look fine sitting still but reveal a problem once it is moving or turning. Taking a few minutes to verify these points helps the new tires wear properly and reduces the chance of discovering a fitment issue after installation.
How often should tires on a 2014 Lexus Trucks RX350 be inspected?
Tires on a 2014 Lexus Trucks RX350 should be inspected regularly, not only when replacement time arrives. Routine checks for pressure loss, tread wear, cuts, bulges, and sidewall damage help catch problems early, especially on a vehicle that may alternate between daily use and longer parked periods.
A useful habit is to look over the tires before longer drives and whenever the seasons change. The RX350 uses modern radial sizes, so irregular wear can also reveal alignment, suspension, or inflation issues that affect ride and tire life. Even if tread depth appears acceptable, age and condition still matter, particularly on a lower-mileage vehicle.
