According to their page http://area51.stackexchange.com/proposals/2305/bicycles we can see that at the end of beta this Q&A site had only 4 questions per day and is indicated as red with comment needs work. So why it passed beta phase
From the Bicycle SE meta: At what point will Bicycles SE grow out of the beta stage?
Must we have 15 questions per day and over 1,500 visits per day
No, it doesn't really work that way. There are only a few minimum requirements that must be met before a site qualifies to graduate:
- Must be in beta at least 90 days.
- At least 10 users with 2,000+ reputation
- At least 5 users with 3,000+ reputation
You're good on all those fronts.
Once Bicycle SE's traffic started increasing steadily, they were ready to graduate.