18.1X10 on MTK's plane was a bit loud too for my liking. He tried a 17X12 as well, which I thought was much quieter and pleasing to my ears. I am one of those who is sensitive to noise and can usually hear a bad bearing a mile away<g>.

Also got to hear the 18.1X10 on a YS 170 CDI today which I thought was quite acceptable. Looks like the 18.1X10 is not the answer for the Syssa.