Tambor de freno

The cast-iron brake drum 3-08320 for the BMW Isetta front axle (replaces, among others, 4-1230 and B6-04-0870) is a used original part and serves as the friction surface for the brake shoes. As part of a restoration, concentricity, inner diameter, and possible cracking should be carefully checked, and the drum should be professionally turned if necessary to ensure reliable braking performance.