What we did here was put the Rim on it's own layer which is off for now. Just to get it out of the way for the next step. So we should now have a screen that looks like this. Now it's time to make the profile for the spokes of the rim. Here is one of the places where you can have lots of fun with the look of the rim.
Lets start by making a curve.
This is something to remember when you work with Rhino. You can make it any shape you like, but I would not go crazy here. Keep it simple. Here is the same curve with the control points turned on so you can see how many I used for the curve. Also note that the first 2 control points are in line with each other, This will make sure that when I revolve the curve, I will not have a sharp point in the middle of the rim.