The 2017 Porsche 718 Boxster marked an important transition for Porsche’s mid-engine roadster, pairing sharper modern proportions with the new 718 name and a distinctly contemporary performance character. Tire fitment plays a central role in that balance, because this Boxster uses staggered radial sizes with separate front and rear fitments across 18-, 19-, and 20-inch wheel packages. That means the first step is confirming both axle position and wheel diameter before comparing options. From there, available choices include Blackwall sport radials along with select Redline and raised white letter rear options in 265/35R20. For owners focused on crisp road manners, appearance, or preserving the car’s intended stance, exact fitment matters.
Which Tire Size Is Right for The 2017 Porsche 718 Boxster
The 2017 Porsche 718 Boxster uses six primary tire sizes, and the correct choice depends first on axle position and wheel diameter. Front sizes are 235-section radials, rear sizes are 265-section radials, and fitment varies across 18-, 19-, and 20-inch setups. Before selecting a tire, confirm whether the car is a Base Front, Base Rear, S Front, or S Rear configuration and verify the actual wheel diameter on the car.
235/35R20 is a metric radial size with a 235-millimeter section width, a 35-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2017 Porsche 718 Boxster, this is a front fitment used with the larger-diameter wheel package, so it is part of the car’s staggered front-to-rear setup rather than a universal four-corner size. Available options in this size include Blackwall sport radials from Nitto and BFGoodrich. It is the right size to evaluate when the car has 20-inch front wheels and the goal is to keep the intended front fitment relationship intact.
235/40R19 uses the same 235-millimeter section width but pairs it with a 40-series profile and a 19-inch rim diameter in radial construction. For the 2017 Porsche 718 Boxster, this size serves as a front fitment on 19-inch wheel applications and appears on both Base Front and S Front configurations. Product choice here centers on a Blackwall BFGoodrich g-Force Phenom T/A. It is the front size to consider when preserving a 19-inch setup and matching the tire to the correct rear companion size on the car.
235/45R18 is a metric radial with a 235-millimeter section width, a 45-series aspect ratio, and an 18-inch rim diameter. On the 2017 Porsche 718 Boxster, this is the 18-inch front fitment and it appears on Base Front applications rather than across every version of the model. Available Blackwall choices include several BFGoodrich g-Force series options, including Comp 2 AS, Sport Comp 2, and Phenom T/A. This size becomes the focus when the car carries 18-inch front wheels and the buyer wants to compare series character within the correct front fitment.
265/35R20 is a wider metric radial size with a 265-millimeter section width, a 35-series profile, radial construction, and a 20-inch rim diameter. On the 2017 Porsche 718 Boxster, this is a rear fitment for the 20-inch staggered setup, so it should be matched to the proper 20-inch front size rather than treated as a standalone choice. Product variety is broader here, with Blackwall options from Nitto and BFGoodrich plus Pro-Trac Street Pro III versions in Redline and RWL. This size matters most when the car has 20-inch rear wheels and appearance as well as fitment are part of the decision.
265/40R19 combines a 265-millimeter section width with a 40-series profile and a 19-inch rim diameter in radial construction. For the 2017 Porsche 718 Boxster, it serves as the rear fitment on 19-inch wheel applications used on both Base Rear and S Rear configurations. Blackwall performance options are available from Nitto and BFGoodrich, giving buyers a choice of series within the correct rear size. It is the rear size to review when maintaining the 19-inch staggered layout and keeping the proper front-to-rear sizing relationship on the car.
265/45R18 is a metric radial size with a 265-millimeter section width, a 45-series aspect ratio, and an 18-inch rim diameter. On the 2017 Porsche 718 Boxster, this size is the 18-inch rear fitment used on Base Rear applications, making it part of the Base model’s 18-inch staggered arrangement rather than a fitment shared across the full range. Selection in this size should be approached as the rear half of that package. Buyers should confirm that the car actually wears 18-inch rear wheels before using this size as the starting point for comparison.
Sub-model fitment on the 2017 Porsche 718 Boxster varies by axle position and wheel package rather than following one universal size across the lineup. Checking the exact front or rear configuration matters, especially because the Base and S applications do not share every wheel-diameter option.
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2017 Porsche 718 Boxster Base Front
The 2017 Porsche 718 Boxster Base Front uses three possible front radial sizes tied to 18-, 19-, or 20-inch wheel packages. Tire selection starts with confirming the front wheel diameter, then comparing the available series that match the car’s existing staggered setup.
The 2017 Porsche 718 Boxster Base Rear uses three rear radial sizes that correspond to 18-, 19-, or 20-inch wheels. Because the rear fitment is wider than the front, the key is matching the correct rear size to the car’s wheel diameter and front companion size.
The 2017 Porsche 718 Boxster S Front uses 19- or 20-inch front radial sizes rather than the full 18-to-20-inch spread seen elsewhere in the range. That makes wheel confirmation especially important before comparing tires, since the correct front size depends on which S wheel package is on the car.
The 2017 Porsche 718 Boxster S Rear uses 19- or 20-inch rear radial sizes paired with the matching staggered front setup. Tire choice here should focus on verifying rear wheel diameter first, then selecting among the available rear options in the correct size and sidewall treatment.
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 Porsche 718 Boxster Tires for Sale
Available 2017 Porsche 718 Boxster tire choices center on radial performance tires from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare Blackwall options across several g-Force and NT555 G2 series, with Redline and RWL styling available in 265/35R20 rear fitment.
Owners of a 2017 Porsche 718 Boxster usually need answers about staggered sizing, front-versus-rear fitment, wheel diameter, and how available tire series and sidewall styles affect the final choice. These FAQs focus on those exact fitment and selection questions.
Tire Size & Fitment
What tire size fits a 2017 Porsche 718 Boxster?
The 2017 Porsche 718 Boxster uses staggered radial tire sizes rather than one universal fitment. Front sizes are 235/45R18, 235/40R19, and 235/35R20, while rear sizes are 265/45R18, 265/40R19, and 265/35R20.
The correct choice depends on both axle position and wheel diameter, so the first check is whether the tire is for the front or rear of the car. After that, confirm whether the Boxster has 18-, 19-, or 20-inch wheels, because the size pairing changes with the wheel package.
What size rim does a 2017 Porsche 718 Boxster use?
A 2017 Porsche 718 Boxster uses 18-inch, 19-inch, or 20-inch rims depending on the tire size and configuration. The front sizes correspond to 235/45R18, 235/40R19, and 235/35R20, while the rear sizes pair with 265/45R18, 265/40R19, and 265/35R20.
Rim diameter is the first thing to confirm before buying tires for this Boxster, since each size is tied to a specific wheel package. A quick visual check of the wheel or the current tire sidewall helps prevent ordering a front size for the rear, or a 19-inch tire for an 18-inch wheel.
Do all 2017 Porsche 718 Boxster sub-models use the same tire size?
No, the 2017 Porsche 718 Boxster sub-models do not all use the same tire size. The Base Front and Base Rear configurations include 18-, 19-, and 20-inch options, while the S Front and S Rear configurations use 19- and 20-inch sizes.
That difference means the right tire depends on the exact front or rear position and the wheel diameter fitted to the car. A Boxster S owner should not assume the 18-inch Base sizes apply, and a Base owner should still confirm whether the car is running its original wheel package or a later change.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Porsche 718 Boxster?
Start with the exact front or rear size and the wheel diameter on the car, because the 2017 Porsche 718 Boxster uses a staggered setup. Construction is straightforward here since the fitments are radial, so the next comparison points are tire series, sidewall style, and any rim-width or load details that apply to the size.
The best choice depends on how the car is used and how closely the tire should match the current setup. A Boxster driven mainly on the street may lead to different series preferences than one chosen mainly for appearance, and the rear axle offers more visible style variation in some 20-inch applications.
What sidewall styles are available for 2017 Porsche 718 Boxster tires?
Most available 2017 Porsche 718 Boxster tire options use a Blackwall sidewall, which is the dominant style across the front and rear sizes. In 265/35R20 rear fitment, additional sidewall treatments include Redline and RWL through the Pro-Trac Street Pro III series.
That means sidewall appearance is mostly a rear-wheel decision when the car runs 20-inch wheels. Buyers who want a cleaner modern presentation may stay with Blackwall, while those looking for a more distinctive visual accent can compare the Redline or raised white letter options without changing the basic rear tire size.
What brands offer tires for the 2017 Porsche 718 Boxster?
Tires for the 2017 Porsche 718 Boxster are available from BFGoodrich, Nitto, and Pro-Trac depending on the size. BFGoodrich appears across several front and rear fitments, Nitto is available in selected 19- and 20-inch sizes, and Pro-Trac appears in 265/35R20 rear applications.
Brand comparison matters less than starting with the correct axle position and wheel diameter, since not every brand covers every size in the same way. Once the proper size is confirmed, the meaningful differences become tire series, sidewall treatment, and whether the available options support the appearance and driving use planned for the car.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Porsche 718 Boxster?
A period-style approach for a 2017 Porsche 718 Boxster starts with keeping the correct staggered radial sizing and the wheel diameter that suits the car’s present configuration. Because this is a modern sports car application, the visual character comes more from maintaining the proper proportions than from moving into vintage construction types.
Blackwall tires are the most natural fit for a contemporary Boxster look, especially on the front sizes and most rear offerings. Owners chasing a more individualized presentation can also consider the 265/35R20 rear Redline or RWL options, but the first priority should still be preserving correct front-to-rear fitment and stance.
How does tire construction affect the appearance of a restored 2017 Porsche 718 Boxster?
Tire construction is less of an appearance divide on a 2017 Porsche 718 Boxster than it is on older collector cars, because the primary fitments here are already radial. The stronger appearance variables are the exact size, the wheel diameter, and the sidewall treatment chosen for the rear 20-inch application.
Keeping the correct staggered radial sizes helps preserve the car’s intended proportions and avoids a mismatched look between front and rear. Sidewall style then becomes the finishing decision, with Blackwall giving the most understated presentation and Redline or RWL adding more visual emphasis on cars equipped with 265/35R20 rear tires.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Porsche 718 Boxster?
Yes, modifications can affect tire fitment on a 2017 Porsche 718 Boxster, especially because the car uses staggered front and rear sizes across multiple wheel diameters. Aftermarket wheels, changes in wheel width, suspension lowering, or altered alignment settings can all change how a given tire works within the wheelwell.
The safest approach is to verify the actual wheel diameter on the car, then check clearance at steering lock and under suspension movement before changing sizes or profiles. Even when a tire matches the correct nominal size, differences in wheel setup can influence clearance and the overall front-to-rear relationship.
What should I inspect before driving a 2017 Porsche 718 Boxster on new tires?
Before driving a 2017 Porsche 718 Boxster on new tires, check that the front and rear sizes are mounted in the correct positions and that each tire matches the wheel diameter in use. It also helps to confirm air pressure, look for proper bead seating, and inspect the tire and wheel for any visible shipping or installation damage.
A short initial drive should be followed by another walk-around to confirm there is no rubbing, unusual air loss, or contact with suspension or fender components. Since the Boxster uses a staggered setup, a simple front-to-rear mix-up can create immediate fitment problems even when all four tires are the right diameter.
How should tires on a 2017 Porsche 718 Boxster be maintained?
Tires on a 2017 Porsche 718 Boxster should be maintained with regular pressure checks, visual inspections, and close attention to tread and sidewall condition. Look for cuts, cracking, bulges, uneven wear, or slow air loss, and remember that a low-mileage sports car can still age its tires even when tread depth remains good.
Storage conditions matter as much as mileage on a collector-kept or seasonal Boxster. Keeping the car away from prolonged sunlight, moisture, and ozone-producing sources helps protect the tires, while periodic inspections of both the front and rear fitments make it easier to catch aging or wear issues before a longer drive.
