| Utah Mountain Biking |  | UT | Lehi | 7 |
| Ubac | | QC | Bromont | 5 |
| Uberbike | | | Sheffield | 4 |
| Uc Cyclery | | CA | | 3 |
| Uinta Bicycles | | UT | Kamas | 0 |
| Ukbike Store | | | Gosport | 18 |
| Ukee Bikes | | BC | Ucluelet | 2 |
| Ultimate Bicycle - Matthews | | NC | Charlotte | 5 |
| Ultimate Bicycle - Pineville | | NC | Pineville | 0 |
| Ultimate Cycles | | AZ | Goodyear | 1 |
| Ultimate Cycles Nowra | | | Nowra | 2 |
| Ultimate Rentals and Bike Shop | | PA | Grove City | 1 |
| Ultimate Sports | | CO | Trinidad | 1 |
| Ultime Vélo | | QC | Sainte-Julie | 6 |
| UltimeBike | | | Avignon | 2 |
| Ultra Violet Alma | | QC | Alma | 1 |
| Ultra Violet Chicoutimi | | QC | Chicoutimi | 1 |
| Ultraviolet | | QC | Jonquière | 4 |
| Um mais um bike upgrades e oficina | | | Nova Iguaçu | 4 |
| Unaas Cycling | | | Oslo | 0 |
| Union Cycle | | MA | Attleboro | 2 |
| Union Street Cycle | | BC | Vancouver | 1 |
| Unit 23 | | | Dumbarton | 74 |
| Unit Cycles LTD | | | Truro | 3 |
| United Cycle | | AB | Edmonton | 98 |
| United Cycling | | PA | Johnstown | 0 |
| United Spokes | | NY | Bronx | 4 |
| UniTrek | | | Poprad | 0 |
| Universal Cycles | | OR | Portland | 22 |
| Universal Cycles | | CA | Studio City | 3 |
| Universal Cycles Lancaster | | PA | | 0 |
| Universal Sports | | SK | Humboldt | 2 |
| University Bicycle Center, Inc | | FL | Tampa | 3 |
| University Bicycles | | CO | Boulder | 12 |
| University Cycle | | MN | Mankato | 0 |
| University of Alabama Outdoor Recreation Bike Shop | | AL | Tuscaloosa | 1 |
| Upcycle Bikes | | | Saarbrücken | 1 |
| Upper Mountain Bikes | | | Blackheath | 0 |
| Upshift Cycles | | CA | San Jose | 0 |
| Urban bike | | QC | Montreal | 1 |
| Urban Cycles | | | Bristol | 6 |
| Urban Downfall Cycles | | UT | Orem | 33 |
| Urban Tri Gear | | IL | Westmont | 0 |
| urban wheels | | | Rhondda | 2 |
| urban wheels skate store | | | | 0 |
| Urbanair | | | Derbyshire | 19 |
| Urbane Cyclist Worker Co-op | | ON | Toronto | 12 |
| Urbanistic Tea & Bike Shop | | CO | Denver | 0 |
| USA Bikes | | | Cholula | 11 |
| Ute City Cycles | | CO | | 5 |
| Útisport Akureyri | | | Akureyri | 0 |
| UW Bike Centre | | ON | Waterloo | 1 |
| UWSA Bike Lab | | MB | Winnipeg | 1 |