18 cylinder(r = wheel_d/2, h = wheel_h, $fn = 128);
20 cylinder(r = wheel_d/2 - wheel_thick, h = wheel_h + 2*eps);
24 for (a = [0:360/spokes:360-eps]) {
28 translate([-spoke_w/2, 0, 0])
29 cube([spoke_w, wheel_d/2 - wheel_thick/2, eps]);
30 translate([-eps/2, 0, spoke_h-eps])
31 cube([eps, wheel_d/2 - wheel_thick/2, eps]);
35 cylinder(r = center_d/2, h = wheel_h);
41 translate([0, 0, -eps])
42 cylinder(r = center_hole/2, h = wheel_h + 2*eps);