Specialized Crux 5 Transition Kit

Cables on the Crux 5 run through the upper headset bearing, which means the stack between that bearing and the underside of the stem is frame-specific hardware rather than something you pull from a parts bin. The Crux 5 Transition Kit from Specialized is the factory set of covers and spacers that bridges the head tube, the routing path, and the cockpit above it. If a piece went missing during a travel build, got chewed up in a crash, or you need to reset bar height after a fit session, this is the assortment that covers it.

The contents support two setups. For a stacked front end, a 7mm lower headset transition top cover adapts the frame to the spacer stack, and an upper stem transition spacer sits directly beneath a Roval Cockpit or Rapide Stem. Between those two pieces you get three 10mm aero plastic spacers and one 5mm, so 35mm of height is on hand and can be reordered or pulled out as your fit changes. For a slammed position, a single 8mm piece combines the lower headset cover and the upper stem transition into one part and takes the spacers out of the equation entirely.

Fit is tied to one pairing: a Crux 5 frame running either the Roval Cockpit or the Rapide Stem. Front-end hardware for this generation does not carry over from the 2021-2025 Crux, which used external cable routing and a different transition cover above the head tube. The tube shaping and cable path changed enough that parts from the older bike won't seat correctly, so matching the kit to the frame generation is the step that keeps this from becoming a wasted order.... Read More