Racing spikes built to blaze long-distance track races. See how they run. *World Athletics regulations on the maximum stack height for track spikes have changed. With a stack height over 20mm, these spikes are no longer race legal. Key features Weight: 138g Long-distance track spikes developed with OAC athletes Reduces impact as you race CloudTec® cushioning, Helion™ HF hyper foam Elite energy return Fiberglass-nylon Speedboard® redefines forward motion Gain traction with six removable spikes on a plate grip Contoured fit and enhanced breathability Single layer upper keeps things light