Published by Rims & Tires
Compiled & checked by the site's publisher from manufacturer, NHTSA & USTMA data · Updated 2026-07-24
The Porsche Boxster is a mid-engine roadster with a flat-six engine over the rear axle, the same fundamental architecture that makes the 911 a handling benchmark. Boxster tires always use a staggered fitment (wider rear than front) to balance the rear weight bias. Getting tire selection right here is not cosmetic. It affects how the car actually handles.
Porsche Boxster tire sizes
The Boxster 718 (2017 to present) uses 235/45ZR18 front and 265/45ZR18 rear on 18-inch standard wheels, 235/40ZR19 front and 265/40ZR19 rear on the mid 19-inch option (S standard), and 235/35ZR20 front and 265/35ZR20 rear on the top 20-inch package (GTS standard). PASM (Porsche Active Suspension Management) vehicles may specify slightly different load indices. Verify on the door sticker.
Earlier 981 Boxster (2012 to 2016) used 235/45ZR18 front and 265/45ZR18 rear on 18-inch, 235/40ZR19 front and 265/40ZR19 rear on 19-inch, or 235/35ZR20 front and 265/35ZR20 rear on 20-inch. The staggered nature means front and rear tires must be purchased separately and cannot be rotated.
Best summer tires for the Porsche Boxster
Michelin Pilot Sport 4S: the benchmark summer tire for the Boxster. Available in all common Boxster staggered sizes (235/45ZR18, 265/45ZR18, 235/40ZR19, 265/40ZR19, 235/35ZR20, 265/35ZR20). The PS4S is the factory-specified tire on many Boxster configurations. Dry grip, steering precision, and progressive limit behavior are exceptional.
Michelin Pilot Sport Cup 2: for track-day and sport-driving Boxster owners who want maximum performance. The Cup 2 sacrifices wet weather and cold temperature performance for outright dry grip. Not a daily tire but transformative on a track day.
Continental ExtremeContact Sport 02: competitive summer alternative to the Michelin at lower cost. Available in Boxster staggered sizes. Strong dry and wet performance, slightly less steering feedback at the limit than the PS4S.
West Georgia Local
Find the right shop near you
Tell us your vehicle and what you need — we'll match you with a vetted West Georgia shop. Free, no obligation.
Sport all-season for year-round Boxster use
Michelin Pilot Sport All Season 4: for Boxster owners who drive year-round in markets with occasional cold weather. Available in 235/45ZR18 and 265/45ZR18. A significant drop from summer performance but the best all-season option for maintaining Boxster character in all conditions.
Best Tires for the Porsche Boxster at a glance
| Tire | Best For |
|---|---|
| Michelin Pilot Sport 4S | the benchmark summer tire for the Boxster. Available in all common Boxster staggered sizes (235/45ZR18, 265/45ZR18, 235/40ZR19, 265/40ZR19, 235/35ZR20, 265/35ZR20). The PS4S is the factory-specified tire on many Boxster configurations. Dry grip, steering precision, and progressive limit behavior are exceptional. |
| Michelin Pilot Sport Cup 2 | for track-day and sport-driving Boxster owners who want maximum performance. The Cup 2 sacrifices wet weather and cold temperature performance for outright dry grip. Not a daily tire but transformative on a track day. |
| Continental ExtremeContact Sport 02 | competitive summer alternative to the Michelin at lower cost. Available in Boxster staggered sizes. Strong dry and wet performance, slightly less steering feedback at the limit than the PS4S. |
Frequently asked
What tire size does the Porsche Boxster use?
Boxster 718 (18-inch standard): 235/45ZR18 front, 265/45ZR18 rear. 19-inch: 235/40ZR19 front, 265/40ZR19 rear. Optional 20-inch: 235/35ZR20 front, 265/35ZR20 rear. Always verify on the door sticker.
How much do Porsche Boxster tires cost?
235/45ZR18 front: $175 to $280 per tire. 265/45ZR18 rear: $200 to $320 per tire. A full staggered set of four on 18-inch wheels installed runs $750 to $1,200.
How do I know when my Boxster needs new tires?
Performance tires lose grip before they look worn, so trust how the car feels. Vague turn-in or easy slip in the wet means the tread's had it. Check depth with a quarter, and watch the shoulders, which wear first on a car driven hard. Summer tires also harden with age, so a set that's several years old may be due even with tread left.
Do I have to replace all four Boxster tires at once?
Not necessarily. If your Boxster runs a staggered setup, the wider rears usually wear faster, so replacing by axle as they go is normal and correct. Just keep the same tire model across the car for balanced handling. A shop can tell you whether the fronts still have life when the rears are done.
Keep reading
Last updated 2026-07-24. General guidance only — confirm specifics with a local shop for your exact vehicle.