@Chuck K posted:Yes, definitely. The Flyonel flanges are huge even relative to hi-rail wheels from AM, SHS/MTH, SSA and Ace. In fact the flanges are so big on the PA's and on the tenders, pilots and trailing trucks of the Flyonel steamers that they bump against the molded rail spike heads of 27" radii FasTrack curves making a very loud and very bad rumbling as they pass through. All the other aforementioned brands of hi-rail wheels travel these curves with no problem.
Maybe if you are up close and really looking, but if they are running... I keep trying to load a video that has all 3 types of wheels in one train (going through a turnout) and the focus is on the wheels -- you can't tell. Don't know if it will run for you but try the link:
http://www.tomsturnouts.com/video/VideoTTT.html
Tom Stoltz
in Maine