conversion
| km/h | min/km | min/mi | mnemonic |
|---|---|---|---|
| 5 | 12:00 | 19:18 | 1st gear | WWI |
| 6 | 10:00 | ~16:00 | 10 ×/+ 6 |
| ~9.66 | ~6:13 | 10:00 | rat |
| 10 | 6:00 | 9:39 | 2nd gear | WWII |
| ~10.73 | 5:35 | 9:00 | 9 + √3 |
| 12 | 5:00 | ~8:00 | φ |
| ~14 | 4:21 | 7:00 | 4+2+1 = 7 |
| 15 | 4:00 | 6:26 | 20 — 5,K? |
| ~16.1 | 3:43 | 6:00 | 10 mph |
| ~19.3 | 3:06 | 5:00 | length per hour |
| 20 | 3:00 | 4:50 | 3rd gear | max |
| ~24.14 | 2:29 | 4:00 | mental barrier |