My Catrike Road has just short of 300 miles on it and at the end of a short social ride today started a high pitch squeal and a nasty grating sound.
Apparently the big idler wheel is the source of the squeak, and stops turning which is the grating.
It was obviously cranked down as I cannot loosen the bolt by hand. I could try lubing but that would attract grit.
How about some wisdom from those who have gone there before me?