Device for supporting a raw rubber tire for the manufacture of a pneumatic tire having arms, each bearing a block articulated to the arm and arranged to extend above it. Each block has an upper face arranged to support an upper bead of a tire and a lower face arranged to be actuated by a lower bead of the tire. Each block is arranged such that, with the block extending as a projection from the arm in a direction radial to a main axis of the device on an opposite side of the arm to the axis, an upward force on the lower face places the block in a position in which it no longer extends as a projection from the arm in the radial direction on that side of the arm.