Rear brake drum on all post 1984 cars plus the Mini Cooper "S" 1275GT models which has a built in spacer ( 1") and uses standard 1 1/4" shoes (GBS101MS). It will also fit the front or rear of a non-S Mini, with 1 1/4" shoes or (1 1/2" shoes GBS102, on twin-leading fronts only). Fitting to the front increases track width on early front drum brake cars.