The TW16 is a bespoke plycycle for Tony Wheeler. It is almost entirely hollow, with a wall thickness of 8mm, the frame, forks, bars, seat post and seat clamp weigh in at a combined 4.65 kgs. In the outer laminations there are layers of flax that work in conjunction with the timber to increase the stiffness of the frame.
This frame was recently put through the relevant Australian standards tests and passed with flying colours. 220 kg of force was put on the frame from front axle to rear axle, and it deflected 21 mm before springing back into shape undamaged. This translates to the frame doing 45.3 Joules of work. (The standard requires a frame to do 40 Joules of work without damage). Similar tests were done on the forks and handle bars with equally good results.