Every Car2Go I've seen since moving to Portland has had a bike rack attached (none with bikes, 8mo. of observation). Portland bikers ride their bikes, they do not car top them. In the suburbs its a different deal. Most bikes are car topped and few are seen in traffic. Should you be in a Car2Go service area that presently sends cars out without racks... my motto in such situations: "better to ask forgiveness than to seek permission...