The rear brake drum of the Mini Cooper "S" model has a built in spacer ( 1") and uses stock 1 1/4" shoes (GBS101). It will also fit the front or rear of a non-S Mini, with 1 1/4" shoes (1 1/2" shoes, GBS102, on twin-leading fronts only). If fitting to a non 'S', also requires 21A1278
'S' wheel stud, 4 per side, and SF604121
drum screw, 2 per side.