The XPS Ribs are a 16" LT E commercial grade all steel ply carcass and tread and come in a 3042 lbs and a 2680 lb load capacities.
The Bridgestone R-238 are same sizes same commercial grade all steel ply carcass 16" LT E tires. Both are tops for trailer use with 6k and 5k axles.
Maxxis and Endurance are just another poly carcass ST class tire.
My '97 11200 lb 5th wheel trailer is old and lots of miles. I've used two sets of BFG Commercial T/A 2 16" LT215/85-16 E @ 2680 lbs. First set ran to the wear bars at 55k miles/7 years and second set around 53k miles with no issues.
The OPs 26' fwrks 5th wheel on the net has a 10500 lb gvwr. The 16" LT E at 3042 lbs capacity or 2680 lbs capacity has plenty of capacity and reserve for that size trailer.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides