| Abbreviation | Definition |
|---|---|
| TRO | Truck Race Organisation |
| TROT | Trail Racing Over Texas |
| TRP | TEKTRO Racing Product |
| TRP | Tektro Racing Products |
| TRPB | Thoroughbred Racing Protective Bureau |
| TRPU | Tacloban Racing Pigeon Union |
| TRR | The Racing Report |
| TRR | Thunder Run Racing |
| TSLR | Team Scott Lagasse Racing |
| TSR | Tony Stewart Racing |
| TTR | Table Top Racing |
| TTR | Tony Thompson Racing |
| TURTLE | Trace Unlimited Rays Through Lumped Elements |
| TVR | Team Validation Racing |
| TVRP | Thunder Valley Raceway Park |
| TWR | Team Warpath Racing |
| TWR | Tom Walkinshaw Racing |
| TXR | Team Xtreme Racing |
| TXR | Texas Raceway |
| TYRE | Trace Your Route Everywhere |