Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
Velobike Argon18 Longboi Direct Mount Stem
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Altias Stem — Argon18

SKU: VB-SLB-A18-120/30
Regular price
$500.00
Sale price
$500.00
Regular price
Sold out
Unit price
per 

Developed in collaboration with Aus Cycling and Cycling Canada for the Paris 2024 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 and order the screws here.

Velobike Longboi Stem for Argon18 framesets exploded

Geometry:

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

Velobike Argon18 Longboi Stem User manual

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
  • UCI Legal
  • JKA certified for Japanese's Keirin Racing 
  • 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
  • New Zealand FernMark Licenced

Included:

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

Optional Extras:

© The intellectual property for this product is owned by Velobike (Papertowns LTD). All rights reserved.

Customer Reviews

Based on 3 reviews
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F
FUMIYA
too good

I was impressed when I installed this stem. The handlebar area became 200g lighter, and both aerodynamics and rigidity improved. There was no flex at the start of sprint. It is expensive, but it's worth buying.

J
James
This thing rocks

I've wanted a stem like this for a long time. The previous options were just too expensive - I did consult with a local machine shop to make one too. Anyway, I'm super excited to have this. It just looks so smooth and sleek. It fits nicely. And I no longer have to remove/attach the stem mount when swapping to pursuit bars. (This was a minor inconvenience, but it was annoying, and it provided too many opportunities to lose pieces in travel.)

J
Jeremy
Perfect aesthetic

I bought a 130mm by 60 rise altias stem for my Argon. Works perfectly and saves me heaps of time switching to pursuit setup. And looks as flash as Michael Jackson.