quote "After the original rear tire on my RT only lasted 6k miles, I started using car tires."
Yes I was especially disappointed in the rear tire on the the 14 RTS. It was bald in the middle way before 10,000 miles, and after 5 OEM Kenda rear tires, and the well known compound change after the soft 14 model, I do think the Kendas are "better".
Better for me means they last longer, and roll and balance better. Our 2011 RT had issues with the front Kendas balance, and after the alignment was corrected, the next set was better. We have had better luck/experience with the current 15 RT OEM tires, and the wifes 16 F3Ts front Kendas have rolled smooth for over 40,000 miles.
The rear Kendas on these 15 and 16 models got us 12,500 miles and 13,000 miles before being replaced with a Kumho Ecsta and a General Altimax respectively.
The fronts were sourced and mounted at Walmart, and with Lamonts centrimatic balancers my wifes F3 is ready to roll next year....
Now at 40,180 miles, "Babys got new shoes"- I do think the feedback has given Kenda and BRP stimulus to improve, and competition and choices are always good.