| Abbreviation | Definition |
|---|---|
| CCNB | Cycling Campaign for North Bedfordshire |
| CCP | Certificate of Cycling Proficiency |
| CCSD | Cycling Camp San Diego |
| CFB | Crazy Freakin Biker |
| CFB | Crossing Freestyle Bikes |
| CFC | Cool For Cycling |
| CFCG | Christian Fellowship Cycling Group |
| CFF | Cycling for Fun |
| CIBA | Central Indiana Bicycling Association |
| CIE | Cycling Is Easier |
| CIRC | Cycling Independent Reform Commission |
| CMBC | Carmel Mountain Bike Club |
| CMF | Cycling Multi Frequencies |
| CNLT | Cycling No Limit Travel |
| CNSW | Cycling New South Wales |
| COGS | Cycling Opportunities Group for Salisbury |
| COMBO | Central Ohio Mountain Biking Organization |
| CPF | Cycling Promotion Fund |
| CRBC | Centre Region Bicycle Coalition |
| CROW | Cycle, Run, Or Walk |