2009 Bentley Brooklands — Coupe
The 2009 Bentley Brooklands Coupe came from the factory equipped with 255/40R20 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.
255/40R20
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (102 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~28" |
| Revolutions per mile | ~719 |
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What this size means for your Bentley Brooklands
On the 2009 Bentley Brooklands Coupe, the factory 255/40R20 measures about 28″ in overall diameter with a 102 mm (4″) sidewall, and completes roughly 719 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.
On a vehicle of this age, the Bentley Brooklands may have been refitted with a slightly different replacement size somewhere in its life, so check the current sidewall — not just the factory spec — before buying.
Bentley Brooklands tire sizes by year
- 2010 Bentley Brooklands 255/40R20
- 2008 Bentley Brooklands 255/40R20
- 1998 Bentley Brooklands 235/65R16
- 1997 Bentley Brooklands 235/65R16
- 1996 Bentley Brooklands 235/65R16
- 1995 Bentley Brooklands 235/70R15
- 1994 Bentley Brooklands 235/70R15
- 1993 Bentley Brooklands 235/70R15
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.