| Abbreviation | Definition |
|---|---|
| PVBC | Pomona Valley Bicycle Coalition |
| QBC | Quincy Bike Club |
| QCBC | Quad Cities Bicycle Club |
| RACC | Royal Albert Cycling Club |
| RAGBRAI | Register Annual Great Bicycle Ride Across Iowa |
| RAGBRAI | Register's Annual Great Bicycle Race Across Iowa |
| RAGBRAI | Register's Annual Great Bicycle Ride Across Iowa |
| RAGBRAI | Registers Annual Great Bike Ride Across Iowa |
| RAMBA | Range Area Mountain Bike Association |
| RCBD | Rapid Cycling Bipolar Disorder |
| RCC | Rapha Cycling Club |
| RDC | Radio Duty Cycling |
| RDGA | Route Des Grande Alpes |
| REBEL | Really Excellent Biking Entering Latelife |
| RJS | Ride, Jump, Sweat |
| RMCM | Regional Mercury Cycling Model |
| RNBC | Regional Niagara Bicycling Committee |
| RPAC | Recycling Public Advisory Council |
| RTBC | Regional Trails and Bicycling Committee |
| RWC | Real World Cycling |