The 2017 Lexus IS300 sits in the modern sport-sedan tradition, blending sharp styling, rear-drive proportions, and a chassis that rewards owners who care about steering feel and road manners. Tire choice matters more than usual on a car like this because the setup changes by configuration. A 2017 Lexus IS300 may use a 225/45R17 radial, or it may use a staggered 18-inch radial combination with 225/40R18 in front and 255/35R18 in the rear. Available choices lean toward blackwall performance-oriented radial tires, with a few 17-inch options adding raised white letter or redline styling. The right decision starts with confirming whether the car is on 17-inch wheels or the staggered 18-inch package.
Which Tire Size Is Right for The 2017 Lexus IS300
The 2017 Lexus IS300 uses three primary tire sizes, and the right one depends on the exact wheel setup. One configuration uses a 17-inch radial tire all around, while the 18-inch setup uses different front and rear sizes. Start by confirming wheel diameter, then verify whether the car has the single-size 17-inch arrangement or the staggered 18-inch combination before comparing brands, sidewall treatments, or tire series.
225/45R17 is a metric radial size in which 225 identifies section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 17 is the rim diameter in inches. On the 2017 Lexus IS300, this size serves the 17-inch wheel setup and keeps the selection focused on modern radial performance tires. Available choices include BFGoodrich, Nitto, and Pro-Trac, with blackwall options joined by RWL and redline treatments in select applications. This size is the one to evaluate when the car uses 17-inch wheels and the goal is to balance correct fitment with the appearance and driving character you want.
225/40R18 is a metric radial size with a 225-millimeter nominal section width, a 40-series profile, radial construction, and an 18-inch rim diameter. On the 2017 Lexus IS300, this size is used on the front of the staggered 18-inch setup rather than across all positions. Product choices in this size come from BFGoodrich and Nitto, mainly in blackwall performance-oriented series such as g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This is the size to confirm when matching the front axle on an 18-inch IS300 and preserving the intended front-to-rear tire relationship.
255/35R18 is a metric radial size where 255 denotes nominal section width in millimeters, 35 is the aspect ratio, R means radial construction, and 18 identifies rim diameter. On the 2017 Lexus IS300, this is the rear tire size for the staggered 18-inch arrangement, pairing with a narrower 225/40R18 front tire. BFGoodrich and Nitto options are available in blackwall form across several performance-focused series, giving owners room to compare load figures, rim-width compatibility, and tire character. This size matters most when the rear of the car is being matched correctly to an 18-inch staggered setup.
Fitment varies within the 2017 Lexus IS300 lineup, so sub-model identification matters before choosing a tire. Some versions use a single 17-inch size, while others use a staggered 18-inch front-and-rear combination that must be matched correctly by position.
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2017 Lexus IS300 Base
The 2017 Lexus IS300 Base uses the 17-inch tire setup rather than the staggered 18-inch arrangement. That makes tire selection more straightforward, with the focus shifting to brand, sidewall style, and the specific radial tire series that best matches the car's intended use.
The 2017 Lexus IS300 Base Front uses the front size from the staggered 18-inch configuration. Tire selection here should stay centered on the correct front-position size and on maintaining proper pairing with the corresponding rear tire size on the same wheel package.
The 2017 Lexus IS300 Base Rear uses the wider rear size from the staggered 18-inch setup. That makes rear tire selection a matter of confirming the 18-inch package and choosing a radial tire that matches the front setup in both fitment intent and overall tire character.
The 2017 Lexus IS300 F Sport Front uses the same front tire size as the 18-inch staggered Base front setup. Choosing among the available radial options comes down to matching the correct front size first, then comparing tire series and performance-oriented product details.
The 2017 Lexus IS300 F Sport Rear uses the same wider rear tire size as the staggered 18-inch Base rear setup. Selection should begin with the correct rear-position size, then move to comparing blackwall radial options that suit the car's wheel setup and intended road 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 2017 Lexus IS300 Tires for Sale
Available 2017 Lexus IS300 tires center on modern radial performance choices from BFGoodrich, Nitto, and Pro-Trac. Depending on size, buyers can compare blackwall designs across several tire series, with select 225/45R17 options also offering raised white letter or redline sidewall styling.
Common 2017 Lexus IS300 tire questions usually come down to identifying the correct size by wheel setup, understanding the staggered 18-inch arrangement, and comparing available radial tire styles, brands, and maintenance considerations before regular road use.
Tire Size & Fitment
What tire size fits a 2017 Lexus IS300?
The 2017 Lexus IS300 uses either 225/45R17 or a staggered 18-inch setup with 225/40R18 in front and 255/35R18 in the rear. All of these are radial tire sizes. The correct choice depends on which wheel package is on the car.
Start by checking the actual wheel diameter and whether the car uses the same size at all four corners or different front and rear sizes. That step matters because a staggered 18-inch setup cannot be treated like the 17-inch configuration when selecting replacement tires.
What size rim does a 2017 Lexus IS300 use?
A 2017 Lexus IS300 uses either 17-inch or 18-inch rims, depending on configuration. The 225/45R17 tire fits the 17-inch setup, while the 225/40R18 and 255/35R18 sizes belong to the 18-inch arrangement.
Wheel diameter is the first thing to verify before ordering tires, especially on a car that may have changed hands or received aftermarket wheels. Once diameter is confirmed, check whether the car uses a square setup or staggered front-and-rear sizing so the replacement tires match the wheel package correctly.
Why does the 2017 Lexus IS300 have more than one tire size?
The 2017 Lexus IS300 has more than one tire size because it was fitted with more than one wheel-and-tire arrangement. One setup uses 225/45R17, while the 18-inch configuration uses 225/40R18 in front and 255/35R18 in the rear.
That means tire selection is tied to the exact configuration on the car, not just the year, make, and model. A quick check of the wheel diameter and the tire sizes already mounted will usually confirm whether the car uses the single-size 17-inch setup or the staggered 18-inch package.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Lexus IS300?
Start with the correct size and wheel arrangement for the car: 225/45R17 for the 17-inch setup, or 225/40R18 front and 255/35R18 rear for the staggered 18-inch package. From there, compare radial tire series, rim-width suitability, load figures where stated, and the kind of road use the car actually sees.
Appearance can matter too, especially since most options are blackwall while some 225/45R17 choices add raised white letter or redline styling. The best comparison comes from matching the tire to the car's wheel setup first, then narrowing the selection by brand, series, and presentation.
What sidewall styles are available for 2017 Lexus IS300 tires?
Most available 2017 Lexus IS300 tires use a blackwall sidewall, especially in the 18-inch sizes. In 225/45R17, sidewall choices broaden to include blackwall, raised white letter, and redline treatments, giving the 17-inch setup more visual variety than the staggered 18-inch package.
Sidewall style does not change the need to match the correct tire size to the wheel arrangement. It does, however, affect how the car presents itself, so buyers using the 17-inch size have more room to blend a modern radial fitment with a more distinctive visual look.
What brands offer tires for the 2017 Lexus IS300?
Tires for the 2017 Lexus IS300 are available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich and Nitto cover the main blackwall performance-oriented radial choices, while Pro-Trac appears in 225/45R17 with additional sidewall treatments such as raised white letter and redline.
Brand choice should come after confirming size and wheel setup, since not every brand appears in every fitment. Once the correct size is established, compare tire series, sidewall style, rim-width compatibility, and any stated load information to find the product that best suits the car's use.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Lexus IS300?
A period-style approach on a 2017 Lexus IS300 still begins with the correct modern radial size for the wheel setup already on the car. The 17-inch configuration offers the widest appearance flexibility, including blackwall, raised white letter, and redline choices in 225/45R17.
Owners using the staggered 18-inch setup will see a more contemporary blackwall presentation across the available options. Since this is a modern sport sedan, appearance usually comes down to choosing the correct size first, then selecting the sidewall treatment and tire series that best match the look you want.
How does tire construction affect the appearance of a restored 2017 Lexus IS300?
Tire construction is straightforward on the 2017 Lexus IS300 because the primary fitments are radial across all listed sizes. That keeps the visual difference centered less on bias-ply versus radial and more on sidewall treatment, tire series, and whether the car is on the 17-inch or staggered 18-inch package.
For a clean factory-inspired look, many owners will stay with blackwall radial options, especially on the 18-inch setup. The 17-inch fitment opens the door to more expressive styling through raised white letter or redline sidewalls, but the right visual choice still depends on preserving the correct size and overall wheel arrangement.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Lexus IS300?
Yes, modifications can affect tire fitment on a 2017 Lexus IS300. Aftermarket wheels, changes in wheel width, offset differences, suspension lowering, or body alterations can all change how a 225/45R17, 225/40R18, or 255/35R18 tire sits in the car.
That matters most on the staggered 18-inch setup, where front and rear tires already serve different roles. Any car that has been modified should be checked for wheel diameter, wheel width, steering clearance, and fender clearance before a replacement tire is chosen by size alone.
What should I inspect before driving a 2017 Lexus IS300 on new tires?
Before driving a 2017 Lexus IS300 on new tires, inspect inflation pressure, wheel condition, valve stems, tread seating, and overall clearance at the front and rear. It also helps to confirm that the car received the correct size at each position, especially if it uses the staggered 18-inch setup.
A short initial check after installation is worthwhile because it can reveal rubbing, uneven stance, or an incorrect front-to-rear match before more miles are added. Looking over alignment condition and suspension wear is also smart on a sport sedan, since those issues can shorten tire life quickly.
How often should tires on a 2017 Lexus IS300 be inspected?
Tires on a 2017 Lexus IS300 should be inspected regularly for pressure loss, uneven tread wear, cuts, punctures, sidewall damage, and any signs of aging. A car with a staggered setup deserves extra attention because front and rear tires are different sizes and should not be assumed to wear the same way.
Routine inspection is especially useful before longer drives or after the car has been parked for extended periods. Catching shoulder wear, low pressure, or clearance issues early helps protect both ride quality and handling, and it gives you time to correct alignment or suspension problems before tire damage worsens.
