What does 2.2 stand for? 

2.2

The Union Cycliste Internationale (UCI), the world's governing body in the sport of bicycle racing, classifies races according to a rating scale. The rating is represented by a code made of two or three parts and indicates both the type or style of race (the first part), and its importance or difficulty (the second and third parts, lower being harder). The first part can be an integer or an abbreviation, and the second part, when present, are usually integers. Both parts are separated by a period or decimal point (.). A higher rated race will result in the successful riders receiving more world ranking points.

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