The ROR brake drum 21220183 is a heavy-duty component designed for use in trailers and semi-trailers equipped with ROR/Meritor axles. This brake drum features:

Outer diameter: 419 mm
Braking surface: 187 mm
Height: 237 mm
Inner hub diameter: 282.6 mm
Bolt circle diameter: 335 mm
Stud holes: 10, with a diameter of 24.5 mm
It is a popular choice for trailers and heavy-duty applications, ensuring durable and reliable braking performance. This part is compatible with several OEM references such as 22222978 and 22224179, making it interchangeable with other parts in the ROR range.