Well, the deed is done! I have a Vredestein Quatrac tire on the rear of my 2019 Ryker Ace 900 and got to take it for a quick spin today. My immediate impression is that it is much smoother running. I never really noticed a roughness from the rear with the stock Kenda, but immediately noticed a very, very smooth quality to the new tire. I purchased the Vredestein in the stock 205/45 R16 size and my local mechanic mounted it for me. We'll see what type of mileage I get out of it compared to the 11,000 on the Kenda.