Hi ! So my son is not a very happy person ! He has only had the bike for less than a month and already there is an issue he has only ridden it twice as he was away ! Today he went to ride and needed to pump up the front tire and the valve broke off ! Yes we dished out the almost $50.00 for the correct pump ! I would like to know if the front tire is under warranty as now there is no way to pump up the front tire ! Very disappointed that this very expensive gift is now unusable after only being road twice ! If you could please email me back regarding the issue with the front tire I would appreciate it !