Porsche 718 Boxster/Cayman tire size
Original tire sizes for the Porsche 718 Boxster/Cayman, model years 2017, 2018, 2019, 2020, 2021, 2022, 2023 and 2024. Trim levels and wheel packages change the size within the same year, so confirm on the door-jamb sticker before ordering.
Check before you order. The surest answer is the tires on the car right now: the size is molded into the sidewall. The placard inside the driver's door tells you what the factory fitted. Our guide on reading a tire size shows exactly where to look.
Size by year and trim
| Model years | Trim or package | Tire size | From |
|---|---|---|---|
| 2017-2024 | 19 in rear | 265/40R19 | $150 |
Tire size by model year
| Model year | Tire size | Trim or package | From |
|---|---|---|---|
| 2024 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2023 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2022 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2021 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2020 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2019 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2018 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
| 2017 Porsche 718 Boxster/Cayman | 265/40R19 | 19 in rear | $150 |
What Porsche approves
Porsche-approved tires are marked N0, N1, N2 and so on. The number is the generation of the approval, not a quality grade.
Porsche tests each tire against the specific car and raises the number every time the spec is revised. Mixing an N0 on one axle and an N2 on the other is not recommended, and on 911 models the front and rear tires are usually different sizes.
Brands that carry the approval
Written on the sidewall as: Michelin Pilot Sport 4S (N0), Pirelli P Zero (N1).
The drawing carries the sizes we list for this car, so you know what you are looking for. The placard on the car is still the final word, and it is the only place that gives the cold pressures: the number molded into the sidewall is the maximum the tire can hold, not what your car wants.
What those tires cost
Porsche 718 Boxster/Cayman tires: common questions
What size tires does a Porsche 718 Boxster/Cayman take?
The most common original size is 265/40R19. Other model years and trims use different sizes, so check the list on this page and confirm against the sticker inside your driver's door.
Can I fit a different size on my Porsche 718 Boxster/Cayman?
You can, within limits: the overall diameter should stay within about 3 percent of the original, and the load index and speed rating must meet or exceed the door placard. Anything further changes your speedometer reading and can rub at full lock.
Where is the tire size on a Porsche 718 Boxster/Cayman?
Open the driver's door and look at the white and yellow placard on the door jamb or the B-pillar. The same size is also molded into the sidewall of the tires currently on the car, unless someone changed them.
What size tires does a 2024 Porsche 718 Boxster/Cayman take?
The 2024 Porsche 718 Boxster/Cayman came from the factory on 265/40R19. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.
What size tires does a 2023 Porsche 718 Boxster/Cayman take?
The 2023 Porsche 718 Boxster/Cayman came from the factory on 265/40R19. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.
What size tires does a 2022 Porsche 718 Boxster/Cayman take?
The 2022 Porsche 718 Boxster/Cayman came from the factory on 265/40R19. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.