| Abbreviation | Definition |
|---|---|
| MNCF | Malaysian National Cycling Federation |
| MNZ | Motorcycling New Zealand |
| MOAB | Murfreesboro Outdoor and Bicycle |
| MOTORCYCLES | motorcycling |
| MSCG | Mudford Social Cycling Group |
| MTB | Mountain Bike |
| MTB | Mountain biking |
| MTB | Mountain Trek Bicycle |
| MTRAC | MARS Team Redstone Alliance for Cycling |
| MUB | Mount Union Bikers |
| MVBC | Mohawk Valley Bicycling Club |
| NABAC | North Andover Bicycle Advocacy Committee |
| NABW | North American Bicycle Week |
| NBBC | New Bedford Bicycle Committee |
| NBG | National Bicycle Greenway |
| NBL | National Bicycle League |
| NCC | Northampton Cycling Club |
| NCCA | National Collegiate Cycling Association |
| NCSB | National Cycling Strategy Board |
| NEDB | New England Dirtbikes |