[Rod]

Originally Posted by KenWittlief

I was referring to perpendicular pins that take all the torque applied to the wheel. I have spent many hours replaceing those at competitions.

I clicked into the drawings and I think I found what you are talking about. The pin is wedged between the wheel and the shaft, to hold the key tight on the opposite side?

Why not tap the shaft and put a small bolt with a large washer on the end, to keep the key from slideing out? that would make it easier to remove / replace the wheel.

Ken,
The shaft is tapped and there is a bolt on the wheel to hold it on.
Look again.