Rookie question, appoligies in advance

[s_forbes]

This is our teams first year, and as the title states, sorry in advance for posting a simple problem. Short of legos, no one on our team has ever built, designed, or had any experience with a "high tech" robot.

My question is, what is the preferable way to attach axles to the frame? It seems like such a hassle compared to the rest of the robot, but again, we lack experience.

The wheels we will probably use are the traction wheels on ifirobotics. They have bearings in their hub and the sprocket is attatched to the wheel, so I assume that the axle will not have to rotate at all? If not, should we use a clamp to attach it to the frame? Where would I obtain one? Should I make it? Can it attach firmly to C-channel? Am I even on the right track with any of these questions?

Any help would be greatly, greatly appriciated!