| First year | Tyres supplier | % Correct |
|---|---|---|
| 1950 | Pirelli | 99%
|
| 1977 | Michelin | 88%
|
| 1976 | Bridgestone | 72%
|
| 1964 | Goodyear | 57%
|
| 1950 | Dunlop | 43%
|
| 1950 | Firestone | 36%
|
| 1954 | Continental | 22%
|
| 1954 | Avon | 16%
|
| 1950 | Englebert | 11%
|