The Crankbrothers Highline XC/Gravel Dropper Post (100mm Travel, 27.2mm Diameter) is designed specifically for cross-country and gravel bikes with narrow, traditional seat tubes. It features a smooth Internal Floating Piston (IFP) hydraulic cartridge and is backed by an industry-leading 4-year warranty.

Key Technical Specifications

• Diameter: 27.2mm (Commonly found on gravel, cyclocross, and hardtail XC frames).
• Travel (Drop): 100mm of infinitely adjustable travel.
• Total Length: 427mm from the base actuator to the saddle rails.
• Weight: 434g (Significantly lighter than standard trail bike dropper posts).
• Routing: Internal stealth routing.
• Setback: 0mm (Straight head design with a 2-bolt standard clamp).
• Minimum Stack Height: 60mm (The space required between the frame collar and saddle rails when fully compressed).

Fit & Insertion Tolerances

Gravel and XC frames often have bottlenecked seat tubes, water bottle bosses, or unique frame geometries. Ensure compatibility by checking the following measurements:

• Maximum Insertion Depth: 264mm is required inside your frame to slam the post completely flush against the seat collar.
• Minimum Insertion Depth: 100mm must safely stay inside the frame to prevent leverage damage.
• Maximum Extension Height: 300mm from the frame collar to the saddle rails at full extension.

Sourcing & Kit Contents

• What is Included: Shipped with premium Jagwire® inner cable and housing and a bottom quick-connect mechanism.
• Remote Requirement: No remote is included. To actuate this on drop bars, you will need a dedicated left-hand lever like the Highline Drop-Bar Remote, or a standard 1x thumb shifter for flat handlebars.

With its lightweight design, precise engineering, and compatibility with narrow seat tubes, the Crankbrothers Highline XC/Gravel Dropper Post is an ideal upgrade for gravel and XC riders.