Kenda Karriers are the stock tires that came on our Roo. Three camping seasons and a hair shy of 6200 miles and we have had no problems. I inflate them to the prescribed 50 psi and keep them covered when we're home. I wouldn't hesitate to buy another set. Kenda has been around a long time and in my opinion makes a decent tire.
2013 Roo 183
2012: 1042 Miles, 13 Nights camped
2013: 2772 Miles, 27 Nights camped
2014: 2259 Miles, 30 Nights camped
2015: 1644 Miles, 20 Nights camped
2016: 550 Miles, 11 Nights camped