1966 Chevrolet Chevelle — SS
The 1966 Chevrolet Chevelle SS came from the factory equipped with 205/75R14 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.
205/75R14
| Section width | 205 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (153.8 mm) |
| Rim diameter | 14" |
| Overall tire diameter | ~26.1" |
| Revolutions per mile | ~773 |
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What this size means for your Chevrolet Chevelle
On the 1966 Chevrolet Chevelle SS, the factory 205/75R14 measures about 26.1″ in overall diameter with a 153.8 mm (6.1″) sidewall, and completes roughly 773 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 1966 Chevrolet Chevelle 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 1966 Chevrolet Chevelle trims
- Base 195/75R14
Chevrolet Chevelle tire sizes by year
- 1977 Chevrolet Chevelle 205/75R15
- 1976 Chevrolet Chevelle 205/75R15
- 1973 Chevrolet Chevelle 225/70R14
- 1972 Chevrolet Chevelle 235/60R15
- 1971 Chevrolet Chevelle 215/70R14
- 1970 Chevrolet Chevelle 215/70R14
- 1969 Chevrolet Chevelle 215/70R14
- 1968 Chevrolet Chevelle 225/70R14
- 1967 Chevrolet Chevelle 195/75R14 / 205/75R14
- 1965 Chevrolet Chevelle 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.