[chimerax-users] how to change the radius of loop

Hello, Does anyone know how to modify the radius of loops? I am trying to show structural difference between the three aligned proteins with the cartoon helices shown as tubes. However, when I reduced the helix radius from 2 to 1 ( "cartoon style modeh tube rad 1 sides 24"), the radius of a helix is only about twice that of a loop/coil. Also, what does the number "24" do in the "sides 24"?. I could not find the description on this on ChimeraX Any help will be appreciated. Thanks, Best wishes, Winston