Size specific, premium concave platform pedal provides optimal shoe/pedal interface. Titanium spindle for weight reduction. Optimal surface area. Minimal profile 11mm-13mm thin. Concave platform for secure foothold. 10 adjustable pins per side for grip. Premium bearings & seal system. Stamp large recommended for shoe sizes: 10-15 (us) // 43-49 (eu). Stamp small recommended for shoe sizes: 5-10 (us) // 37-43 (eu).