An envelope spreader system is provided. The envelope spreader system includes a chassis having an opening configured to receive a tire assembly and a linkage assembly. The linkage assembly includes a plurality of links rotatably coupled to the chassis and extending into the opening. The linkage assembly further includes a spreader bounded at least in part by the plurality of links, the spreader being configured to cause the tire assembly to move; and an actuator operably coupled to the linkage assembly and configured to operate the linkage assembly between a first position and a second position.

An envelope spreader system includes a chassis having an opening, a linkage assembly comprising a plurality of links rotatably coupled to the chassis and extending into the opening, and an actuator operably coupled to the linkage assembly and configured to operate the linkage assembly between a first position and a second position. The plurality of links includes a primary link having a primary link first end rotatably coupled to the chassis at a first fixed pivot point and a primary link second end configured to operably engage a portion of a tire envelope and a secondary link having a secondary link first end rotatably coupled to the chassis at a second fixed pivot point and a secondary link second end configured to engage a portion the tire envelope.

An envelope spreader system includes a chassis having an opening to receive a tire assembly, a primary link including a single elongated member rotatably coupled to the chassis at a first fixed pivot point and extending into the opening from a primary link first end to a primary link second end, a first engaging member coupled to the primary link second end and configured to engage a tire envelope at a location corresponding to the location of the primary link second end, a secondary link including a single elongated member rotatably coupled to the chassis at a second fixed pivot point and extending into the opening from a secondary link first end to a secondary link second end, and a second engaging member coupled to the secondary link second end and configured to engage the tire envelope at a location corresponding to the location of the secondary link second end.