wall_width = 3;
wheel_width = 9;
-wheel_radius = sqrt(2 * pow(wheel_square_spoke_size / 2, 2)) + wall_width / 2;
+wheel_radius =
+ sqrt(2 * pow(wheel_square_spoke_size / 2, 2)) + wall_width / 2 + 1;
motor_shaft_radius = 3.7;
motor_shaft_flat_width = 4.8;