Oldsmobile tire sizes

We cover 5 Oldsmobile models across 6 factory fitments, spanning model years 1966 to 2004. The size that turns up most often on a Oldsmobile is 215/65R15, followed by 215/70R14 and 235/70R15. Wheel diameters run from 14 to 15 inches, so the trim and wheel package matter as much as the model year.

Oldsmobile does not stamp an approval code on tires the way Porsche and BMW do, so any tire in the right size that meets the load index and speed rating on the door placard is a legitimate replacement. Pick on wet braking, tread life and price instead.

Pick your model below to see the size for every year and trim, what it costs from budget to premium, and which tires are worth buying in that size. If you already know your size, search by size instead, and if you are not sure where to find it, our guide on reading a tire size shows exactly where the placard sits.

Oldsmobile was General Motors' innovation division and one of the oldest car brands in the world, founded in 1897. It gave America the first mass-produced automatic transmission and, in the 442 and the Hurst/Olds, some of the best-regarded muscle cars of the period. GM announced its closure in 2000 and built the last Oldsmobile, an Alero, in April 2004.

For tires that makes Oldsmobile a two-part make: 1960s and 1970s muscle cars being restored, and 1980s to 2000s sedans still in daily use on ordinary sizes.

Tires on a Oldsmobile

Oldsmobile was a GM division, so original tires from the 1980s onward carry a General Motors TPC SPEC number molded into the sidewall, the GM original equipment marking; replacement tires do not carry it, which is normal. The muscle cars are the more interesting half. A 1966 to 1972 442 left the factory on bias-ply tires in lettered sizes and converts to 215/70R14, while the 1970 to 1972 442 W-30 on 15 inch wheels converts to 235/70R15.

Those conversions are by overall diameter rather than by number matching, which is why a period F70-14 becomes a 215/70R14. Coker Tire and Diamond Back supply both genuine bias-ply reproductions for show cars and radials with period raised white letters for cars that get driven, and the radial is the better choice for anything that sees a highway. The later cars are simple: the 1983 to 1984 Hurst/Olds and the 1985 to 1987 442 run 215/65R15, the G-body Cutlass Supreme 205/70R14, and the 1999 to 2004 Alero 215/60R15.

Wheel width is the trap on the older cars, because a period six-inch rim will not properly support a much wider modern tire.

The models that matter

The 442 is the model most Oldsmobile tire orders are for, on 215/70R14 for 1966 to 1972 and 215/65R15 for 1985 to 1987, with the W-30 on 235/70R15. The Hurst/Olds of 1983 to 1984 uses 215/65R15 and the G-body Cutlass Supreme of 1978 to 1987 uses 205/70R14. The Alero of 1999 to 2004 uses 215/60R15, which is still a cheap and widely stocked size.

What owners find out later

The 442 and the Hurst/Olds share their 215/65R15 fitment with the Buick Grand National and the Monte Carlo SS of the same years, so a G-body owner can shop across all three and often find better stock under a different model name. Lettered sizes like F70-14 cannot be converted by matching the numbers, and only the diameter conversion keeps the speedometer honest. Wheels from the 1960s often start leaking at the rim seat once an old hardened tire is broken down.

Nothing from Oldsmobile has TPMS except the last Aleros and Auroras, so most of these cars need manual pressure checks.