This popular replacement spring tension roller is used by several patio door manufacturers. The nylon wheel measures 15/16" in diameter and 1/4" thick.
Good Idea!
The typical patio sliding screen door uses two roller assemblies, one on each bottom corner of the sliding door. We recommend replacing both sliding door rollers at the same time to prevent extra wear-and-tear to one new roller, which will have to work twice as hard when paired with an old roller.