The 2008 Lexus Trucks RX350 sits in the heart of the second-generation RX era, when Lexus had firmly established the model as a refined luxury crossover with everyday comfort and all-weather practicality. Buyers usually approach this vehicle with a modern fitment mindset rather than a restoration-first one, but correct tire sizing still matters because the RX350 uses two different radial sizes: 225/65R17 and 235/55R18. That makes wheel diameter the first thing to confirm before comparing tire choices. For owners who drive their RX regularly, the real decision centers on matching the correct size to the existing wheel setup and balancing road use, load needs, and overall vehicle condition.
Which Tire Size Is Right for The 2008 Lexus Trucks RX350
The 2008 Lexus Trucks RX350 uses two primary tire sizes, and both are radial fitments. The key difference is wheel diameter, with one size built for 17-inch rims and the other for 18-inch rims, while both AWD and FWD versions can use either size. Before choosing a tire, confirm which wheels are actually on the vehicle, especially if it has been changed from its original setup.
225/65R17 is a modern metric radial size in which 225 identifies section width in millimeters, 65 is the aspect ratio, R denotes radial construction, and 17 is the wheel diameter in inches. On a 2008 Lexus Trucks RX350, this size belongs to the 17-inch wheel fitment and is part of the vehicle's standard modern radial tire profile. Available product choice in this size is focused and utility-oriented, including a BFGoodrich All-Terrain T/A KO2 with an RBL sidewall treatment. This size is the right starting point for an RX350 already running 17-inch wheels and for owners who want to verify compatibility before comparing tread style and load capacity.
235/55R18 is also a modern metric radial size, with 235 indicating section width in millimeters, 55 indicating aspect ratio, R showing radial construction, and 18 identifying the wheel diameter in inches. For the 2008 Lexus Trucks RX350, this size serves the 18-inch wheel configuration rather than the 17-inch setup. Its practical role is to match the correct wheel package first, since the difference here is not just tire width but the entire wheel-and-tire combination. Buyers considering this size should confirm that the vehicle is actually equipped with 18-inch rims before moving on to brand, tread pattern, or appearance decisions.
Tire fitment is straightforward across the covered RX350 sub-models because both AWD and FWD versions can use the same two radial sizes. The important step is not drivetrain identification alone, but confirming whether the vehicle is on 17-inch or 18-inch wheels before selecting a tire.
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2008 Lexus Trucks RX350 (AWD)
The 2008 Lexus Trucks RX350 (AWD) can use either of the two primary radial sizes, depending on which wheel package is on the vehicle. Tire selection starts with wheel confirmation, then moves to choosing a product that suits the way the RX350 is driven and the specifications of the existing rim.
The 2008 Lexus Trucks RX350 (FWD) follows the same fitment pattern as the AWD version, with both primary radial sizes used across the sub-model. That means the practical decision is confirming 17-inch versus 18-inch wheels first, then narrowing the choice by tire type and vehicle use.
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.
Best 2008 Lexus Trucks RX350 Tires for Sale
Current product choice for the 2008 Lexus Trucks RX350 is centered on the 225/65R17 size, with a BFGoodrich All-Terrain T/A KO2 radial available in an RBL sidewall style. The product grid is most useful for comparing size match, rim-width compatibility, load specification, and intended use.
Owners of a 2008 Lexus Trucks RX350 usually need to sort out two main questions first: which tire size matches the wheels on the vehicle, and what to check before putting the SUV back into regular road use. The FAQs below focus on size, rim fitment, product choice, and practical inspection points.
Tire Size & Fitment
What tire size fits a 2008 Lexus Trucks RX350?
The 2008 Lexus Trucks RX350 uses two primary tire sizes: 225/65R17 and 235/55R18. Both are radial sizes, and both AWD and FWD versions can use either one depending on the wheel package installed on the vehicle.
The main step is confirming whether the RX350 has 17-inch or 18-inch wheels, since the tire sizes are tied to different rim diameters. A vehicle that has been fitted with replacement wheels should be checked carefully so the tire size matches the actual rim size and the available clearance at the suspension and body.
What size rim does a 2008 Lexus Trucks RX350 use?
A 2008 Lexus Trucks RX350 uses either a 17-inch rim or an 18-inch rim, depending on the tire size on the vehicle. The 225/65R17 fitment belongs to a 17-inch wheel, while the 235/55R18 fitment belongs to an 18-inch wheel.
That makes wheel diameter the first fitment detail to verify before comparing tire options. Looking at the current tire sidewall is a quick starting point, but the wheel itself should be confirmed as well, especially on an older crossover that may have seen aftermarket wheel changes or replacement wheel-and-tire packages over time.
Do all 2008 Lexus Trucks RX350 sub-models use the same tire size?
The covered 2008 Lexus Trucks RX350 sub-models share the same fitment pattern. Both the AWD and FWD versions can use 225/65R17 or 235/55R18, so the difference is not between drivetrains but between wheel setups.
That means the buyer does not need to separate tire selection strictly by AWD or FWD first. The more important task is identifying which wheels are on the vehicle now, because once rim diameter is confirmed, the correct size follows and the remaining decisions shift to tire design, load specification, and intended driving use.
Choosing the Right Tire
What should I consider when choosing a 225/65R17 tire for a 2008 Lexus Trucks RX350?
Start by confirming that the vehicle is actually equipped with 17-inch wheels, since 225/65R17 belongs only to that rim diameter. In this size, available product choice includes a radial BFGoodrich All-Terrain T/A KO2 with an RBL sidewall, a 2,150-pound maximum load rating at 65 psi, and a 6.0 to 8.0-inch rim-width range.
Once size is confirmed, think about how the RX350 is used. An all-terrain style tire can suit drivers who want a more rugged look or mixed-use capability, but wheel compatibility, load needs, and ride expectations still need to be checked against the actual vehicle setup before making a final selection.
What brands offer tires for the 2008 Lexus Trucks RX350?
Available product coverage for the 2008 Lexus Trucks RX350 currently includes BFGoodrich in the 225/65R17 size. The available example is part of the All-Terrain T/A KO2 line and uses an RBL sidewall treatment.
Brand choice only matters after the correct size and wheel diameter are confirmed. A buyer comparing tires for an RX350 should look past the name alone and check whether the tire matches the vehicle's rim size, rim-width requirements, load specification, and the kind of road use the crossover will actually see.
How do I choose between the available 2008 Lexus Trucks RX350 tires?
Begin with the non-negotiable fitment points: correct size, correct rim diameter, and radial construction. On the 2008 Lexus Trucks RX350, that means separating the 17-inch and 18-inch wheel setups first, then comparing any available tires by series, sidewall presentation, load specification, and rim-width compatibility.
The right choice depends on how the vehicle is used and how original the wheel setup remains. A regularly driven RX350 may call for a different tread style than one used only occasionally, and any crossover with replacement wheels should be checked carefully so the chosen tire suits the actual wheel width and overall vehicle condition.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 Lexus Trucks RX350?
Yes. Wheel changes, suspension alterations, and other modifications can affect tire fitment on a 2008 Lexus Trucks RX350 even when the tire size appears close to stock. The vehicle already uses two different factory size-and-wheel combinations, so aftermarket changes can make the correct selection less obvious.
Owners should confirm actual wheel diameter and wheel width before choosing a replacement tire. Clearance at the strut, fender, and steering range also deserves attention, especially if the RX350 has been lowered, fitted with non-original wheels, or set up for a different look than its original road-going configuration.
What should I inspect before driving a 2008 Lexus Trucks RX350 on new tires?
A 2008 Lexus Trucks RX350 should be checked for wheel condition, proper tire pressure, visible sidewall damage, tread condition, and any sign of uneven wear before regular driving. It also helps to inspect suspension and steering components, since worn parts can affect how a new tire behaves on the road.
A careful road-use check matters even more on an older vehicle that may have gone through several tire and wheel changes. Looking over alignment condition, air retention, and basic clearance at full steering lock can prevent an otherwise correct tire size from becoming a practical fitment problem after installation.
How often should tires on a 2008 Lexus Trucks RX350 be inspected?
Tires on a 2008 Lexus Trucks RX350 should be inspected regularly, not just when tread looks low. A quick check for air loss, cracking, cuts, bulges, and irregular wear is wise before longer drives and as part of routine maintenance, especially on a vehicle that may alternate between daily use and longer parked periods.
Consistent inspection helps catch issues that size alone cannot solve. A tire can still be the correct 225/65R17 or 235/55R18 and yet be compromised by age, storage conditions, or a suspension problem. Periodic checks also help confirm that pressures stay stable and that the tires are wearing evenly across the tread.
