These are rad. I use them in the position where the bike is parallel to the L-Track in a Smart Floor. Because of this, there is a little less surface area contact between the body of the mount and the tension plate that sits in the track, so I really try to crank the pressure. If there were holes in the flat ends of the tension wheel, I could more easily get leverage by using a big hex key or driver in the wheel. If these wheels get made, put me down for two.