Riding back from a camping trip this weekend (We can do that in Florida during January!) when I noticed my trailer was fishtailing back n forth. I stopped checked tires, good, rearranged camping gear and took off again. Got back up to cruising speed of about 70 and noticed a slight wobble, within a few minutes I've got the trailer fishtailing again. Slowed to below 65 and the fishtailing is gone! Continued home keeping below that speed with no further issue. I have had this trailer for awhile first behind my 1100 Shadow and now behind my RSTD. Until now I always forgot the trailer was back there. Any thoughts?