generally in racing, thats where the clydesdale thing comes into play..
NORBA Classifies Racers / Riders a couple of ways...
1. Pro - Well your getting paid to ride a bike
2. Semi Pro - Well your getting free SWAG and might be getting paid to ride a bike
3. Expert - Well your like caught in limbo.. Fast but not fast enough to get paid to ride a bike
4. Sport - Well your on your way to limbo... Better and more experienced than a beginner.. This is a class a lot of riders will sandbag in.. Meaning they can race expert.. but want to win every sport race..
5. Beginner - Beginner means you have not raced or are new to racing, have not applied for a NORBA ranking, or you just don't race enough to consider yourself a SPORT rider / racer..
Also there is
Normal - Under 200 lbs.. (Just Kidding) there is no normal class... LOL
Clydesdale - Over 200 lbs.. (big guys).. can be clyde in team events if the average weight is over 200 lbs.
Some races also go by age classes as well.. Not going there.. this post is already to long.. why are you still reading this?