2014 Audi A8 — L W12

The 2014 Audi A8 L W12 came from the factory equipped with 265/40R20 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.

265/40R20

Section width265 mm
Aspect ratio (sidewall height)40% (106 mm)
Rim diameter20"
Overall tire diameter~28.3"
Revolutions per mile~711

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What this size means for your Audi A8

On the 2014 Audi A8 L W12, the factory 265/40R20 measures about 28.3″ in overall diameter with a 106 mm (4.2″) sidewall, and completes roughly 711 revolutions per mile. Its 40-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.

Other 2014 Audi A8 trims

Audi A8 tire sizes by year

See every Audi A8 year & trim →

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.