Remades are a horribly exploited underclass of New Crobuzon. Their condition and place in society is a form of indentured service or slavery (in the city itself as well as in its colonies and armies). The Remade are usually (but not always) humans who are caught up in the criminal justice system and then forced to undergo a capricious and cruel alteration at the hands of New Crobuzon's biothaumaturges. In the punishment factories, the prisoners' bodies are horrifically altered, limbs and other body parts replaced with steam-powered machinery, heavy mechanical metal parts, or grafted together with human or animal components. Live foxes sewn into chests, torsos attached backwards to a horse, tentacles and pistons and caterpillar treads and eyes and lizard claws fitted wantonly wherever they will go; the sadism of Remaking knows no limits. Karl Marx speaks metaphorically of this condition when he famously described exploited workers as, "an appendage of flesh on a machine of iron."
In Armada, biothaumaturgical practicioners are willing to undo or mitigate the effects of New Crobuzon's Remaking for a reasonable sum, or even to perform the rare Remaking on request. Elsewhere in Bas Lag, Remaking is almost unheard-of.
(Horses and other service animals are sometimes Remade with mechanical parts for greater speed or power, but of course these are not sapient.)