The Era is the strongest, stiffest and most durable carbon crank ever created by Race Face. The Era is one of the lightest in its class, yet it will last longer than your bike without chafing. It's time to let your cliques do the talking. Specifications : Q-Factor 176mm Includes Case Pads Includes Pedal Boots, Washers + Spindle Spacers (Chain Rings + Bottom Brackets sold separately) Material Axle 7055 Aluminum Alloy Material Handlebar Carbon + Stainless Steel Wear plate Axle Diameter 30mm Weight 483g