Mountain Bike Categories and What they mean - Bike Bros.
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A Glossary of Cycling Events: Road, Off-Road, and Track Racing - Breaking Muscle
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Motorcycle racing | Sport, Safety & History | Britannica
Track cycling - Wikipedia
The four road bike categories | Simplon Magazine
Bike Categories
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AMBCS Race Categories
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Road categories and classifications
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BICYCLE ROAD RACING 101: Types of races and rider disciplines/roles - GC Coaching
Racing Categories Based on FTP - Racing - TrainerRoad
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