The M.O.T. Inspection Manual Issue Date 01 January 2012 LastPage                     NextPage                     Contents                     Back                     Forward                     Home                      3.10    Brake Efficiency Table (Vehicles with 3 wheels) MINIMUM BRAKE EFFICIENCIES REQUIRED PARKING BRAKE VEHICLES WITH 3 WHEELS (CLASSES 3 & 4) SERVICE BRAKE Vehicles with a single line service brake system Vehicles with a split (dual) service brake system Vehicles with 3 wheels with a service brake operating on ALL wheels and a parking brake operating on at least one wheel which were first used: i) before 1 January 1968 40% 25% 16% ii) on or after 1 January 1968 50% 25% 16% Vehicles first used before 1 January 1968 which do NOT have one means of control operating on at least 4 wheels (or 3 for three wheeled vehicle) and which have one brake system with two means of control or two brake systems with separate means of control. 30% from first means of control 25% from second means of control Note: 16% parking brake efficiency equates to a vehicle holding on a gradient of 1 in 6.25