| Abbreviation | Definition |
|---|---|
| CR | Cafe Racer |
| CR | Club Racing |
| CR | Cup Racer |
| CRA | Central Roadracing Association |
| CRA | Champion Racing Association |
| CRA | Cortez Racing Association |
| CRAM | Catamaran Racing Association of Michigan |
| CRAW | Catamaran Racing Association of Wisconsin |
| CRC | Calandra Racing Concepts |
| CRC | Clean Racers Club |
| CRC | Cortez Race Committee |
| CRCA | Canadian Race Communications Association |
| CRCA | Century Road Club Association |
| CRG | Constructors Racing Group |
| CRIS | Customer Racing Information Service |
| CRMB | Classic Racing Motorcycles Belgium |
| CRMC | Classic Racing Motorcycle Club |
| CRPR | California Roundtable on Philosophy and Race |
| CRS | Carbon Race Series |
| CRS | Chicago Racing Series |