| Trittbrettfahrer | free rider |
| trittbrettfahren | freeload |
| Trittbrett | footboard running board |
| Trittleiter | step ladder |
| Dünnbrettbohrer | lightweight |
| Testfahrer | test driver |
| Autorennfahrer | race car driver |
| Geisterfahrer | wrong-way driver motorist driving against the traffic on motorways |
| Radrennfahrer | racing cyclist |
| Treckerfahrer | tractor driver |
| Trickbetrüger | con artist |
| Trittroller | scooter |
| Trittstufe | tread |
| dritte Zähne | false teeth |
| drittletzter | antepenultimate |
| Rittberger | loop jump |
| Ritterturnier | knights’ tournament |
| Rebreather | rebreather |
| Transfettsäure | trans fat |
| Mitfahrer | rider |