The BPW truck brake drum 0310977770 is a durable component typically used in trailers. It is part of the BPW ECO Drum series, designed for long-lasting and efficient performance in heavy-duty applications. With a standard diameter of 420 mm, it features a bolt circle diameter of 335 mm, and 10 stud holes for secure installation. This brake drum is well-suited for demanding commercial transport operations, ensuring reliable braking under heavy loads​.