Linode bandwith upstream/downstream

Is there a theoretical upload and download min/max for a Linode?

Could you say: each physical host has a bandwith of x/kbits upstream and y/kbits downstream. Each physical machine hosts a max of z Linodes => The guaranteed up/down rates are x/z and y/z kbits with a possibility to go as high as x and y kbits if all other Linodes disconnect.

Just wondering because I'm going to experiment with traffic shaping to speed up ssh and other important traffic to my Linode and configurations often need a bandwith parameters.