Mine

thingiverse

A customized version of the object can be found at http://www.thingiverse.com/thing:139726, which was created using Customizer! Visit http://www.thingiverse.com/apps/customizer/run?thing_id=139726 to access the customization options. To print this object, use the following settings: $fn = 30, height = 15, spoke_count = 25, grip_depth = 1, dia_in = 10, double_spiral = 0, grip_density = 0, spoke_thickness = 0.5, dia_out = 77, hub_thickness = 2, grip_height = 0.5, and tread_thickness = 2.