| Abbreviation | Definition |
|---|---|
| BFBC | Bicycle Friendly Berkeley Coalition |
| BG | Biking Guru |
| BGI | Bicycle Garage Indy |
| BIBS | Built in bicycle system |
| BIKE | Biking |
| BIU | BikeTrial International Union |
| BJC | Boulder Junior Cycling |
| BLN | Bicycle League of Norman |
| BLOS | Bicycle Level Of Service |
| BMX | bicycle motocross X |
| BMX | Bicycle Motorcross |
| BMX | Bicycles Made Xtreme |
| BOLT | Bikers Of Lesser Tolerance |
| BPCT | Bigla Pro Cycling Team |
| BPMP | Bicycle Pedestrian Master Plan |
| BPV | Bicycle Powered Vessel |
| BRAG | Bicycle Ride Across Georgia |
| BRAI | Bike Ride Across Iowa |
| BRAN | Bicycle Ride Across Nebraska |
| BRAN | Bike Ride Across Nebraska |