<p>This hub/drum assembly contains everything you need to replace your hub/drums &amp; brakes on 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. 1/2"-20 lugs.<br><br>This also includes 5-bolt electric backing plates that mounts directly onto your axle's flange. Rated at 3,500 lbs each / 7,000 lbs per pair. (10)- 3/8" x 1-1/2" bolts, nuts and lock washers are included.<br><br>Also included are the bearings &amp; seals. (2) Seals included are a double lip SL-213 with a 3.375" outside diameter and a 2.125" inside diameter, .313" thickness. (2) L-25580 inner bearings (1.75" I.D), (2) L-14125A outer bearings (1.25" I.D), (2) cotter pins, (2) dust caps and (16) 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>