JUMP bikes have a u-lock built in to the back computer contraption, and unlock when you request the bike; they have an agreement with SFMTA that they can lock t

JUMP bikes have a u-lock built in to the back computer contraption, and unlock when you request the bike; they have an agreement with SFMTA that they can lock to any of the bike racks on the street, unsure if they're limited to certain locales or if it's city wide.