TTV, not all the associations split the middle group into A and B. Some just have (Hallet equivalent) A (Race), B (Street), and C (Novice) groups.
Not true Dennis....
Race class is Race class
Street A is more advanced
Street B is intermediate
Novice - Hart = C
They have two street classes because of the number of riders and they broke it out so you could choose what level you wanted to ride, street A and B are not the same level riders...