The "speed" of a wheel is it's rate of rotation. The angular inertia depends on the distribution of mass around the center of rotation. Angular momentum is the angular rate of rotation (angular speed) times the angular inertia. If you want to know how fast the wheels perimeter is moving linearly, it's the angular speed in radians per second times the radius.
L=lever arm length
I=moment of inertia
If i were setting up a problem for a first year engineering student to solve, it would require those equations (it may also include the appropriate equation for moment of inertia). But if you're actually interested in a real world situation, then this is probably nowhere near specific enough to help you. But without more information about the problem you are trying to solve, there isn't much we can do. For example, I have no idea what the moment of inertia of a roulette wheel is and no way to solve for it because the geometry of the wheel is irregular.