A roller assembly includes a housing that has a top end, a bottom end and a peripheral wall extending therebetween. The top end has a first well extending downwardly therein. The bottom end has a second well extending upwardly therein. The top end has a groove extending downwardly therein. The groove extends into the first well. The first well may insertably receive a leg of a walker. The peripheral wall is convexly arcuate, giving the housing a spherical shape. A grip is positioned within the first well. The grip may engage the leg of the walker. A lock is coupled to the housing to releasably engage the leg. A roller is coupled to the housing. The roller may roll the walker along the support surface.
