The 10" diameter x 2-1/4" wide Dexter Trailer Hub and Drum Assembly # K08-426-91 is the only option we have that's rated for a 4K axle. This uses parts designed for a #84 spindle so if that's what you have then it will work great!
Here are the bearings and seals used for this hub and drum assembly:
Inner Bearing - # L68149
Outer Bearing - # L44649
Grease Seal - # 58846 (1.719" ID and 2.565" OD)
Attached is a review video for you to check out. If you find that your current hub and drum... view full answer...