Just had a Riken Raptor 225.55.zr16 mounted by the guys at Les Schwab. Took it out for a short 25 mile test ride. Looks like it takes a little more than usual handlebar pressure to countersteer.....but that's ok since I will soon be mounting my sidecar on the bike. Otherwise it tracks straight, and feels solid.
I've had 2 of those Riken Raptors go flat. First one developed a bubble on the side wall, eventually went to a slow leak, then flat. Replaced with another new Raptor, and it's now sitting flat! Just ordered 2 of these to try out, from Tire Rack.
Yes, it does take a bit more force to make her turn, but on a straight away, they work great! The bike I have the CT tire on, is a hard tailed Rocket, raked, stretched, designed for drag strips, and straight runs.