Question Trailers built before ____ are not required to have spring brakes. Answers 1985 1975 1999 Explanation Trailers built before 1975 are not required to have spring brakes. When parking a trailer without spring brakes, be sure to use wheel chocks to prevent the trailer from rolling. Take a FREE Practice Test Now This questions appears in the following tests: New Mexico Double , Idaho Tank , Alabama Combination , Delaware Combination , Hawaii Combination , Iowa Combination , Maine Combination , Michigan Combination , Oregon Combination ,