<p>This hub/drum assembly contains everything you need to replace your hub/drum & brake on the drivers side of your trailer. This assembly works for a spindle that has a 1-3/4" inner bearing surface to a 1-1/4" bearing surface.<br> <br> The 12" x 2-1/2" hub/drum has a 8 bolt on 6-1/2" bolt circle with a 3,500 lbs capacity PER side. Fits 7,000 lb axles.<br> <br> This also includes a 5-bolt electric backing plate that mounts directly onto your axle's drivers side flange. Rated at 3,500 lbs each / 7,000 lbs per pair. (5)- 3/8" x 1-1/2" bolts, nuts and lock washers are included.<br> <br>Also included are the bearings & seal. Seal included is a double lip SL-213 with a 3.375" outside diameter and a 2.125" inside diameter, .313" thickness. (1) L-25580 inner bearing (1.75" I.D), (1) L-14125A outer bearing (1.25" I.D), (1) cotter pin, (1) dust cap and (8) 1/2"-20 lug nuts. The races are preinstalled in the hub/drum for your convenience.</p><ul><li>Please note: Castle nut or grease are not included in this assembly. </li></ul><p><p><p><strong>The center hole (pilot hole) in the wheel needs to be a minimum of 4-1/2" in diameter to use this hub/drum.</strong></p>