+module wheel_solid(radius,
+ width,
+ shaft_radius,
+ shaft_flat_width,
+ wall_width,
+ tread_radius){
+ difference(){
+ rim(radius, wall_width, width);
+ translate([0, 0, width / 2]){
+ tread(radius, tread_radius);}}
+ qr_size = 54;
+ qr_height = 2;
+ linear_extrude(height = qr_height){
+ square(qr_size, center = true);}
+ translate([0, 0, qr_height]){
+ motor_shaft_holder(shaft_radius,
+ shaft_flat_width,
+ wall_width,
+ width - qr_height);}}
+
+/*