I found that you would not see everyone every week. So you would have the same superficial conversation time after time and not feel like a real connection was made.
The group had a core group of genuine friends, but they maintained quite an in-group which was hard to break into as a dilettante - you'd have to commit to doing group activities multiple times every week.
Also banter and stories seem to be how men bond which I find boring and difficult. Cycling clubs are mostly men but there were some women, but then do you seem like a creep if you try to inveigle yourself in with them?
The best connections I made was with lesbians, who I could chat to most comfortably of all. But in the end we were unlikely to be friends off the bike because our lifestyles were so different. Like how many straight geeky single dads do lesbians want in their friendship group really :D