2017 Porsche Cayenne — GTS
The 2017 Porsche Cayenne GTS shipped with 2 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
275/45R20
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (123.8 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~29.7" |
| Revolutions per mile | ~678 |
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295/35R21
| Section width | 295 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (103.3 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~29.1" |
| Revolutions per mile | ~692 |
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What this size means for your Porsche Cayenne
On the 2017 Porsche Cayenne GTS, the factory 275/45R20 measures about 29.7″ in overall diameter with a 123.8 mm (4.9″) sidewall, and completes roughly 678 revolutions per mile. Its 45-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a large-diameter fitment.
The 275/45R20 and 295/35R21 differ in both width and overall diameter (0.6″, 2.1%), which usually means a staggered front/rear setup — the two sizes are not interchangeable side to side, so match each to its correct axle.
Other 2017 Porsche Cayenne trims
- Base Model 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
- Platinum Edition 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
- S 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
- S E-Hybrid 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
- S E-Hybrid Platinum 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
- Turbo 265/50R19 / 275/45R20 / 295/35R21
- Turbo S 295/35R21
Porsche Cayenne tire sizes by year
- 2026 Porsche Cayenne 255/55R20 (Front) / 295/45R20 (Rear) / 285/45R21 (Front) / 315/40R21 (Rear) / 285/40R22 (Front) / 315/35R22 (Rear)
- 2025 Porsche Cayenne 255/55R20 (Front) / 295/45R20 (Rear) / 285/45R21 (Front) / 315/40R21 (Rear) / 285/40R22 (Front) / 315/35R22 (Rear)
- 2024 Porsche Cayenne 255/55R20 (Front) / 295/45R20 (Rear) / 285/45R21 (Front) / 315/40R21 (Rear) / 285/40R22 (Front) / 315/35R22 (Rear)
- 2023 Porsche Cayenne 275/45R20 (Front) / 305/40R20 (Rear) / 285/40R21 (Front) / 315/35R21 (Rear) / 285/35R22 (Front) / 315/30R22 (Rear)
- 2022 Porsche Cayenne 275/45R20 (Front) / 305/40R20 (Rear) / 285/40R21 (Front) / 315/35R21 (Rear) / 285/35R22 (Front) / 315/30R22 (Rear)
- 2021 Porsche Cayenne 275/45R20 (Front) / 305/40R20 (Rear) / 285/40R21 (Front) / 315/35R21 (Rear) / 285/35R22 (Front) / 315/30R22 (Rear)
- 2020 Porsche Cayenne 255/55R19 (Front) / 275/50R19 (Rear) / 275/45R20 (Front) / 305/40R20 (Rear) / 285/40R21 (Front) / 315/35R21 (Rear) / 285/35R22 (Front) / 315/30R22 (Rear)
- 2019 Porsche Cayenne 275/45R20 (Front) / 305/40R20 (Rear) / 285/40R21 (Front) / 315/35R21 (Rear) / 285/35R22 (Front) / 315/30R22 (Rear)
- 2018 Porsche Cayenne 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
- 2016 Porsche Cayenne 255/55R18 / 265/50R19 / 275/45R20 / 295/35R21
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.