2001 Pontiac Grand Am — GT Coupe
The 2001 Pontiac Grand Am GT Coupe came from the factory equipped with 225/50R16 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.
225/50R16
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (112.5 mm) |
| Rim diameter | 16" |
| Overall tire diameter | ~24.9" |
| Revolutions per mile | ~811 |
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What this size means for your Pontiac Grand Am
On the 2001 Pontiac Grand Am GT Coupe, the factory 225/50R16 measures about 24.9″ in overall diameter with a 112.5 mm (4.4″) sidewall, and completes roughly 811 revolutions per mile. Its 50-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a passenger (P-metric / Euro-metric) size.
On a vehicle of this age, the Pontiac Grand Am 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.
Other 2001 Pontiac Grand Am trims
Pontiac Grand Am tire sizes by year
- 2005 Pontiac Grand Am 225/50R16
- 2004 Pontiac Grand Am 225/50R16
- 2003 Pontiac Grand Am 225/50R16
- 2002 Pontiac Grand Am 225/50R16
- 2000 Pontiac Grand Am 225/50R16
- 1999 Pontiac Grand Am 225/50R16
- 1998 Pontiac Grand Am 195/70R14 / 195/65R15
- 1997 Pontiac Grand Am 195/70R14 / 195/65R15
- 1996 Pontiac Grand Am 195/70R14 / 195/65R15
- 1995 Pontiac Grand Am 195/70R14 / 195/65R15
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.