It exists. They are called fast angle wheels in the modeling world.
http://cs.trains.com/ctt/f/95/t/79912.aspx
To quote:
Fast angle wheels first came out when MPC took over Lionel. The wheels are not squared off where they ride on the rail. They are angled to the flange. "Fast angle" is a toolmaker's term for adding an angle to a surface so the part can be quickly removed from the tool without marring the surface during manufacture. Hence the term "fast angle wheel" was coined by Lionel employees.
The fast angle did more than benefit manufacture. Because the wheels are fixed to the axel, it benefits them on curved track. The wheelsets can drift to a point where one wheel diameter point touching the rail is slightly larger than the opposite wheel diameter point touching the rail. This reduces friction because the outside rail is longer in circumference than the inside rail. Especially sharp 031 or 027 curves. If you look closely, you can see the cars lean into the curves as the outside wheels drift to a larger diameter.
Fast angle wheels first came out when MPC took over Lionel. The wheels are not squared off where they ride on the rail. They are angled to the flange. "Fast angle" is a toolmaker's term for adding an angle to a surface so the part can be quickly removed from the tool without marring the surface during manufacture. Hence the term "fast angle wheel" was coined by Lionel employees.
The fast angle did more than benefit manufacture. Because the wheels are fixed to the axel, it benefits them on curved track. The wheelsets can drift to a point where one wheel diameter point touching the rail is slightly larger than the opposite wheel diameter point touching the rail. This reduces friction because the outside rail is longer in circumference than the inside rail. Especially sharp 031 or 027 curves. If you look closely, you can see the cars lean into the curves as the outside wheels drift to a larger diameter.