Cat Chair Tyre

Wheel Hub to suit
http://www.thingiverse.com/thing:959217

Axle Ends for Alloy Bar 12 mm x 3 mm
http://www.thingiverse.com/thing:959236

Axle Ends for Alloy Bar 10 mm x 3 mm
http://www.thingiverse.com/thing:959235