How many times have you been ready to ride only to be confronted with a flat tyre well the alibi wants you to be pumped up to ride not pumping up your tyres thats why it comes with tyres that dont need any air at all thats right you can kiss your pump goodbye and more importantly you can say goodbye to ever having a flat tyre again specialized have also designed an anti rust chain for this bike that removes the need for regular dirty grimy maintenance plus a super comfortable body