A serious shoe for a serious athlete, the New Balance XC900 v2 Spike is for the runner looking to break away from the rest of the pack. FantomFit skeletally engineered upper for ultralight support and fit. Created by fusing two extremely thin materials with a no-sew process. REVlite for a lightweight ride without minimizing construction or sacrificing cushioning and stability. Aggressively lugged and flexible six-spike plate. Includes 1/4" pyramid spikes and a wrench. Wt. 4.5 oz.