Triglide issue
Since this is a H-D TriGlide forum and the question involves a Triglide, I'll answer as a Triglide owner/rider. My 2012 does not have any wobble at any speed. However, like a few other Triglide owners have noticed on other H-D Triglide threads, my steering head bearings were pretty much dry of grease (I'm the second owner) when I went over the bike after the dealer had performed their pre-sale inspection. Of course I've since pumped her full. Might be something to look at.
Since this is a H-D TriGlide forum and the question involves a Triglide, I'll answer as a Triglide owner/rider. My 2012 does not have any wobble at any speed. However, like a few other Triglide owners have noticed on other H-D Triglide threads, my steering head bearings were pretty much dry of grease (I'm the second owner) when I went over the bike after the dealer had performed their pre-sale inspection. Of course I've since pumped her full. Might be something to look at.