1981 Pontiac Lemans — 6cyl
The 1981 Pontiac Lemans 6cyl came from the factory equipped with 185/75R14 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.
185/75R14
| Section width | 185 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (138.8 mm) |
| Rim diameter | 14" |
| Overall tire diameter | ~24.9" |
| Revolutions per mile | ~809 |
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What this size means for your Pontiac Lemans
On the 1981 Pontiac Lemans 6cyl, the factory 185/75R14 measures about 24.9″ in overall diameter with a 138.8 mm (5.5″) sidewall, and completes roughly 809 revolutions per mile. Its 75-series aspect ratio gives a tall sidewall of the kind used on trucks, SUVs, and older passenger cars, built for cushioning and load. In tire terms it is a small-diameter fitment typical of older or economy vehicles.
Because the 1981 Pontiac Lemans predates many current tire lines, confirm this size is still stocked before ordering — some vintage fitments are now served mainly by specialty and classic-car tire suppliers.
Other 1981 Pontiac Lemans trims
Pontiac Lemans tire sizes by year
- 1993 Pontiac Lemans 175/70R13 / 185/60R14
- 1992 Pontiac Lemans 175/70R13 / 185/60R14
- 1991 Pontiac Lemans 175/70R13 / 185/60R14
- 1990 Pontiac Lemans 175/70R13 / 185/60R14
- 1989 Pontiac Lemans 175/70R13 / 185/60R14
- 1988 Pontiac Lemans 175/70R13 / 185/60R14
- 1987 Pontiac Lemans 175/70R13 / 185/60R14
- 1980 Pontiac Lemans 185/75R14
- 1979 Pontiac Lemans 185/75R14
- 1978 Pontiac Lemans 185/75R14
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.