Specialized Crux

The Crux started life as Specialized's pure cyclocross race bike in the late 2000s, with multiple US and World Cup CX wins. In 2021, Specialized fully reinvented the platform: the new Crux is no longer a cyclocross bike but the lightest production gravel bike in the world. A 56cm S-Works frame weighs just 725g — the S-Works complete bike comes in at 7.25kg / 15.9 lbs. The frame uses FACT 12r carbon (Specialized's lightest layup), is shared with the road-going Aethos design language, and accepts 700c × 47mm or 650b × 2.1" tyres. The trade-off for the featherweight: no frame storage, no aero shaping, minimal mount points — pure light-and-stiff gravel.