[MENTION=458351]tubesocksFred[/MENTION], have you tried writing down the frame number and contacting Citibike about the issues? I know the wrench button is there, but they may be overlooking the ratio if they see another issue is there (ie a bad chain, low air pressure, whatever it may be). Maybe it would be a good idea to take down the next bike number that you get with the issue, press the wrench button and email/twitter/call them to let them know about the issue. Just a thought on how to make it more pleasant.