2020 Porsche 911 — Carrera

The 2020 Porsche 911 Carrera 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.

235/40R19

Section width235 mm
Aspect ratio (sidewall height)40% (94 mm)
Rim diameter19"
Overall tire diameter~26.4"
Revolutions per mile~764

Some links on this page are affiliate links — see our disclosure.

295/35R20

Section width295 mm
Aspect ratio (sidewall height)35% (103.3 mm)
Rim diameter20"
Overall tire diameter~28.1"
Revolutions per mile~717

Some links on this page are affiliate links — see our disclosure.

245/35R20

Section width245 mm
Aspect ratio (sidewall height)35% (85.8 mm)
Rim diameter20"
Overall tire diameter~26.8"
Revolutions per mile~754

Some links on this page are affiliate links — see our disclosure.

305/30R21

Section width305 mm
Aspect ratio (sidewall height)30% (91.5 mm)
Rim diameter21"
Overall tire diameter~28.2"
Revolutions per mile~715

Some links on this page are affiliate links — see our disclosure.

Other 2020 Porsche 911 trims

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.