Size reduction assembly for Discus / Hammer Throwing Concentric Circle Designed and manufactured in accordance with the regulations of World Athletics (WA Certificate: E-21-1138).
The HDPE Concentric Circle consists of eight equal sectors which, when assembled, reduce the diameter of the throwing circle from 2,500 to 2,135 mm. Each sector is manufactured from CNC cut high density polyethylene to ensure its shape. The sectors fit together and with the outer ring of the circle, so that they remain in position during use.
Two 50 mm wide adhesive vinyl strips are included to extend the track markings on the concentric circle shaft.