Sorry that tire tore up your trailer.
I have the Sailun S637 on my Fuzion 310 and I have been happy with them so far.
http://gosailun.com/Tires/Sailun/All%20Position/335
Another good choice but more expensive is the GoodYear G614
http://www.goodyear.com/cfmx/web/tru...rodline=160007
Check to make sure you wheel can handle the 110 psi these tires require. My Fuzion wheels were stamped on the backside and I was able to see the rating without removing the tire.
If you need new wheels then I would move to 17.5" Many people like this dealer
http://www.trailertiresandwheels.com/ I personally have never used them.