Altias Stem — Argon18

Developed in collaboration with Aus Cycling and Cycling Canada for the Paris Olympic Games.

Optimised stiffness-to-weight ratio to achieve the best possible direct mount cockpit under high-intensity accelerations. Furthermore, an in-depth aerodynamic study was undertaken to ensure airflow around the leading edge of the stem and headtube junction maintained a fluid and attached airflow.

Note: Direct mount screws are sold separately. please refer to the user manual below to identify your screw length requirements.

Geometry:

Please view the Velobike Longboi Stem - Argon18 User Manual & Geometry Guide for selecting the correct stem size for your requirements.

The user manual includes:

• Reach and stack dimensions
• Handlebar reach limits (to 100mm in front of the axle)
• Stem weights
• Direct mount bolt length requirements 
• Installation instructions
• Installation torque specifications
• Spacer heights and their effect on reach and stack dimensions

Specifications:

• Compatible with the Argon18 Electron Pro (Rio and TKO) Sprint and Pursuit Framesets
• ISO 4210-5:2014 certified (tested to 2x the ISO requirements)
• Aero design developed using CFD software
  

• Bar clamp diameter: 31.8mm

• Bar clamp width: 49mm

• Recommended to use copper grease on screw threads (grease not included)
• Direct-mount screws are sold separately

Included:

• 1x Stem (of selected size)
• 1x Faceplate
  
• 4x Faceplate screws

Optional Extras:

• Direct mount screws
• Stem spacer sets
• Replacement faceplate screws