Not sure what bolt pattern your 235/85R16 wheel/tire is but the Easy Grease Trailer Hub and Drum Assembly item # AKHD-655-6-EZ-K you were looking at is the correct hub and drum for the Timbren Axle-Less Trailer Suspension item # TASR5200S05 you referenced. Both the Timbren's and the Easy Grease Trailer Hub use a inner bearing item # 25580 and an outer bearing item # 15123. The hub is sold individually, has a 6 on 5-1/2 bolt pattern, and is compatible with 16" wheels.
For a set of electric... view full answer...
Typically you want to find the hub face to hub face measurement on an axle like the # 7461121-EB. This is considered the length, which is 95" for this axle. Assuming you mean the hub and drum assembly, the distance between the back of the two is 90". view full answer...