The pilot hole size is the center hole diameter of the wheel. For example the Lionshead Steel Dual Wheel part # LHHA420 has a pilot diameter of 4.75 inches and since this is a hub-centric wheel that centers on the hub with it's pilot diameter this would need to be an exact match for what you plan to replace. view full answer...
For your 2014 Thor Freedom Elite 28H I recommend the SumoSprings Maxim Custom Helper Springs # SSR-106-54-1. Since this is a motorhome the higher capacity of 7,000 lbs is a good choice. These will of course give you more support with the greater capacity but it will also really help reduce sway and body roll. view full answer...