Abstract: In one embodiment, concaves for gyratory crushers are formed in a trapezoidal or triangular shape to achieve essentially three-point contact with an external shell of the gyratory crusher. In a further embodiment, concaves for gyratory crushers are provided with adjustable pads whose position with respect to the back surface of the concave can be changed. In a further embodiment, concaves for gyratory crushers are provided with alignment pads that are inserted between the back surface of the concave and the external shell of the gyratory crusher. In a further embodiment, concaves for gyratory crushers are provided with removable fastening member such as bolts that engage the back surface of the concave to mount the concave to the external shell of the gyratory crusher. The concaves of the present invention can provide secure mounting of the concaves in place to promote longer wear life and are easily removed for replacement.