Unless you can get the bearing numbers and seal information from the manufacturer, there isn't a way to really find that information without removing the hubs. You don't have to dismantle them if you want to measure the spindle in a couple locations with a digital caliper like # PTW80157. I've attached a video of how to do this.
Sometimes there isn't too much wear on the seal and you may be able to read the number on the metal rim. If not, then measuring the spindle and getting as... view full answer...
Thank you for all of the information!
If you can get me some measurements of the fender skirts on your 2015 Minnie Winnie 2201DS I can see if we have a match from our linked selection. Unfortunately we don't have all of the specs for everything (most things really) for trailers so there is some ground work that will need to be done on your end still.
For example, the Phoenix USA Flexy Flares # PX52-170 are a universal fit and measure 58" x 2-1/4". If this matches what you have then this... view full answer...