Garador DR / RM Garage Door SpringWhen replacing garage springs, it is recommended to replace both springs at the same time, to ensure the spring tension and door remain balanced. Garador Original DR RM type spring is to suit Retractable doors with two springs down either side. These doors have horizontal tracks, when the door is open it goes in the garage almost all the way. You can identify that your door is a DR RM type as the lift arms are approx 3ft 9 3 4 in length and have 3