Building Back Wheels for a Lou-vee-Air Car: Solutions to Wobbling Wheels

[Integral0]

I am trying to build the back wheels for a Lou-vee-Air Car. I am having a problem -> the wheels wobble too much. I am using paper clips with 90 degree double-L bends. Can anybody pinpoint some suggestions? I am using tape to hold the clips onto the wheel. I am limited to the materials show on this website (no glue) -> http://www.cmesa.org/advisor%20page/louvee%20car/louvee%20air%20car.htm

 

[Integral0]

RE

actually using a double-bend does work (after several more attempts, using a straw w/o a wire as the axle works well too)