2009 Porsche Porsche 911 — Carrera 4S Coupe

The 2009 Porsche Porsche 911 Carrera 4S Coupe 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.

235/35R19

Section width235 mm
Aspect ratio (sidewall height)35% (82.3 mm)
Rim diameter19"
Overall tire diameter~25.5"
Revolutions per mile~792

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305/30R19

Section width305 mm
Aspect ratio (sidewall height)30% (91.5 mm)
Rim diameter19"
Overall tire diameter~26.2"
Revolutions per mile~770

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Other 2009 Porsche 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.