I’m a high C, but can’t hang on in B’s tried last year and it about killed me (I’m 57 and not getting faster). After last race I was bumped to a B. 3.01 avg. w/kg and 2.94 in “category” w/kg. I’ve had previous races with number just above this and didn’t seem to have such a move. The first 20 were a bit hard as I tried to hang on to a group I had no business being with, and payed for it later in the ride. Would that have done it? I’d hate to quit racing because I have zero business racing B’s.