The CEYLAN truck brake drums MCS4220 and MCS4222 are heavy-duty components commonly used in trailers with 6-stud axle configurations. These drums are built for vehicles that require strong and durable braking systems, specifically for 12 to 16-ton trailers. They are compatible with 20″ and 24″ rims and can be equipped with or without ABS gears, depending on the specific configuration.