2026 Porsche Cayenne Electric — Turbo
The 2026 Porsche Cayenne Electric Turbo shipped with 4 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.
275/45R21 (Front)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (123.8 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~30.7" |
| Revolutions per mile | ~656 |
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315/40R21 (Rear)
| Section width | 315 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (126 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~30.9" |
| Revolutions per mile | ~652 |
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275/40R22 (Front)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (110 mm) |
| Rim diameter | 22" |
| Overall tire diameter | ~30.7" |
| Revolutions per mile | ~658 |
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315/35R22 (Rear)
| Section width | 315 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (110.3 mm) |
| Rim diameter | 22" |
| Overall tire diameter | ~30.7" |
| Revolutions per mile | ~657 |
Compare prices at:
What this size means for your Porsche Cayenne Electric
On the 2026 Porsche Cayenne Electric Turbo, the factory 275/45R21 measures about 30.7″ in overall diameter with a 123.8 mm (4.9″) sidewall, and completes roughly 656 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.
This is a staggered setup: the front axle runs 275/45R21 and the rear runs 315/40R21. The two sizes are not interchangeable, so order each for its correct axle and don't rotate front-to-rear.
Other 2026 Porsche Cayenne Electric trims
- Base Model 255/55R20 (Front) / 305/45R20 (Rear) / 275/45R21 (Front) / 315/40R21 (Rear) / 275/40R22 (Front) / 315/35R22 (Rear)
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.