Let’s learn how to draw rims with a fairly accurate geometry.
Start with a circle and draw a line from the center to the top. This is the first spoke.
No draw a line from the center to bottom and divide it in half. This is a guide line so draw it lightly.Draw a horizontal line across the middle of the previous line all the way to the edges of the circle.
Now draw a couple of lines from these two intersection points to the center.
Here we have a three spoke rim.
If you want a six spokes just extend each spoke all the way to the other side of the circle.