The trailer 9″ brake drum is one of the most common styles of hubs used on medium to heavy duty trailers with mechanical or hydraulic brakes. Each drum comes complete with the bearings, seal, dust cap and nuts you need to safely replace the hubs on your trailer. Designed for everyday use, the LM style of bearings are usually suitable for trailers with 39mm round or 40mm square axles, while the S/LINE style of bearings are typically used on 45mm and selected 50mm axles.
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