Posted 11 January 2008:
http://www.usfirst.org/community/frc...nt.aspx?id=450
What to say about it?
Section 10.2.8.1
The 2008 Trackballs require some care in assembly and inflation. Each Trackball consists of two parts: a Bladder and a Cover.
The bladder has a 120cm diameter and is made of 2500g PVC.