This support roller with nylon roller will help support the gate in the open position.
CG-35P
4-7/8″ Wide Support Roller
Nylon rollers on a galvanized steel mounting bracket for use with 1-1/2" guide rail. Mounts on 3" - 4" post.
Aluminum guide track for side mounted guide rollers. Typically used for gates that have an arched or decorative gate top, protruding pickets, barbed wire, or other top obstructions.