A roller assembly includes an L-shaped bracket and a support bracket, each having a preformed bend that is greater than ninety degrees, but that when under a load of a sliding side door of a vehicle, is configured to decrease under the load to ninety degrees. The roller assembly also includes a roller arm supported between the L-shaped bracket and the support bracket and extending laterally from the brackets for engaging a rail on the body of the vehicle. A spacer is included between the roller arm and the support bracket, preventing contact between them and thus allowing for decreased friction between them.