Correct me if I'm wrong, but I don't believe the side and under wheels are spring loaded (or whatever it is) against the track on Iron Wolf, and other early B&Ms like Vortex (PGA) and Kumba. I think that's why it doesn't deliver the same smoothness that other B&Ms do. Most B&Ms, along with other coasters like recent Intamins have every wheel in contact with the track at all times I believe. While at PGA recently I noticed that not all the wheels on Vortex were in contact with the rails.
Can anyone confirm this?
-Peabody