Nice street candid (or candid-style). The off-centre composition, with the right side offering a clearer view of the yellow cabs behind, works. Not sure about the cropping of his head but perhaps it does make us feel a little closer in to the messenger rather than viewing from a distance?
I like this very much, but I would have cropped other way. IMO it would be better with the whole bicycle and the whole head of the biker. Perhaps you cropped this way for other reason.
I like the position of the rider and the yellow cabs in the background, but maybe if the subject was not cropped out of the picture it would have been better
Aim up! You cropped his head. Interesting idea to use the messenger on a bike, but the image is rather 'ordinary'. Maybe include him weaving in traffic or something to give some feeling or context to his actions.