My old trailer used 14" tires, and when I researched replacements, the Kumhos came very highly recommended by the small, single axle trailer forums (like Casita, etc.). I would have bought them, but they were out of stock. The only other Load Range D tire I could find in 14" at that time was the Kendra Karriers which are distributed by Martin Wheel and available from Northern Tool. I ended up with the Karriers, which seemed like a good heavy tire - much heavier thant the Load Range C's that came off - and we ran them over 15,000 trouble free miles over a couple of years before trading in the trailer .....
If the Kumhos are available, I would get them ......
2012 Keystone Outback 277RL (Salty Doghouse II)
2005 Ford/Quigley E350 4x4 Van 6.0L Diesel (Moby)
Molson (goldendoodle-11yrs) & Zeke (parti poodle-6mos)