Pyramidal replacement spike in Nike Forever XC and Victory XC shoes - YouTube
Sof Sole 1/4 Replacement Pyramid Track Spikes | Big 5 Sporting Goods
Amazon.com: VOCOOL 100 PCS 1/4inch Black Stainless Steel Track and Cross Country Spikes with Spike Wrench, Pyramid Replacement Track Spikes for Sprint Sports Short Running Shoes : Everything Else
Amazon.com: VOCOOL 100 PCS 1/4inch Black Stainless Steel Track and Cross Country Spikes with Spike Wrench, Pyramid Replacement Track Spikes for Sprint Sports Short Running Shoes : Everything Else