Number and size of spikes

Set of 12 hex spikes Outdoors, Cross-country: from 9 mm (dry ground) to 15 mm (soft ground) Running on tracks: 6 mm or 9 mm High jump and javelin throw: 12 mm tolerated on certain tracks Outdoors, All disciplines: 6 mm High jump: 9 mm

Traction

Their shape and material give them excellent grip on track & cross-country