Size reduction assembly for Discus / Hammer Throwing Concentric Circle Designed, manufactured and approved in accordance with the Regulations of the International Association of Athletics Federations (WA Certificate: E-99-0185).
The concentric circle consists of four equal sectors which, when assembled, reduce the diameter of the throwing circle from 2,500 to 2,135 mm. Each sector is manufactured from a steel sheet cut by laser to ensure its shape, to which three steel flat profiles are welded to provide strength and rigidity.
Finally, at each end of the sector there are two plates with through holes in order to place the connecting screws.
The sectors are painted with powder paint and are supplied together with two adhesive vinyl to be placed coinciding with the white lines of the throwing circle.