This is the Tyler McCaul Signature Pedal from Deity. This concave design platform pedal is a rock-solid connection between rider and bike. Deity and Tyler have collaborated for a pedal that riders like Cam Zink are calling the greatest pedal ever made. Try a pair and see. Features: Extruded and Machined from Deity molds and 6061 T6 aluminum Super concave 2.5mm deep pedal profile per side 14mm thin at the center Symmetrical pedal profile for added foot support and stability Dual sided pins with pre-applied Loctite Includes extra set of back up pins Load distribution system to prevent bearing blowout Multi micro sealed bearings and Deity DU Bushing internals Heat-treated Cr-Mo Spindle that is compatible with a standard 15mm wrench or 8mm allen Specifications: Platform Dimensions: 110mm x 105mm Platform Material: Aluminum Spindle Size: 9/16" (Standard) Spindle Material: Chromoly Steel Bearings: Sealed Traction Pins: 14 Per Side (Replaceable) Color: Silver Weight: 409g (Pair)