EXT Arma V4 Shock
EXT Arma V4 Shock
EXT Arma V4 Shock
EXT Arma V4 Shock
EXT Arma V4 Shock

EXT Arma V4 Shock

Regular price$1,895.00

  • Free nationwide shipping on all orders over $149

Adding to an already legendary resume, EXT is proud to introduce the new Arma and Storia V4 Series. The V4 is specifically designed to raise the bar on what is possible in MTB damper performance technology. Don’t be fooled by the similar appearance to its V3 predecessor, for beneath the surface the V4 beautifully refines and improves what was already an industry game changer. Building off of their prestigious pedigree in motorsports racing, EXT has worked diligently to put out a damper that ensures its rightful place as innovative industry leaders in the highly competitive MTB marketplace.

The V4 not only retains and refines foundational aspects of the V3, such as its unique mid body damper characteristics, hydraulic bottom-out circuit and notable high speed control, while simultaneously addressing and integrating feedback from our riders. The V4 celebrates a position sensitive rebound hydraulic top out system, frequency dependent damping, an externally adjustable HBC and a steel DLC coated damper shaft. All of this and more coming in a stronger yet quieter package.


  • PSR (Position Sensitive Rebound), a new unique hydraulic top-out system that eliminates harsh top out and improves sensitivity.
  • Riders can now adjust high and low speed compression with a common multi-tool, needing only 5 mm and 4 mm Allen keys.
  • Frequency dependent damping Adjustable HBC: Once Developed by EXT for motorsport and later introduced in MTB applications, the new HBC system is now more powerful and starts in the last 20% of the stroke (20% on Arma V4). This allows for a lower spring rate choice for maximum compliance, traction, and control.
  • No risk of cavitation: high turbulent flow valves keep damping forces independent from viscosity and temperature changes to perfect pressure balance, eliminate aeration and cavitation, all with very low hysteresis to improve dynamic response.
  • New coatings: improved durability thanks to a new proprietary DLC coating of the chrome-moly steel shaft, and an innovative proprietary DHC tube coating process, both assuring maximum wear resistance.
  • Oil EV2S, a high viscosity index fluid, and phenomenal viscosity ratio.
  • Spring thrust bearings ensure alignment, prevent spring rub and minimize spring noise.
  • Reservoir with large volume bladder design, inflated to 55 psi only
  • More silent.

Here you can find all the available sizes for the shock:
210 / 50 mm

210 / 52.5 mm 

210 / 55 mm 

230 / 57.5mm 

230 / 60 mm 

230 / 62.5 mm 

230 / 65 mm 

250 / 67.5 mm 

250 / 70 mm 

250 / 72.5 mm 

250 / 75 mm 



185 / 50 mm

185 / 52.5 mm

185 / 55 mm

205 / 57.5 mm

205 / 60 mm

205 / 62.5 mm

205 / 65 mm

225 / 67.5 mm

225 / 70 mm

225 / 72.5 mm

225 / 75 mm

*Spring sold separately

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Great experience with Paul. Had an issue with my Fox X2, and sorted me with one of his EXT shocks in the time while a new part came from the UK. Really transparent service, explaining in details the issues and solutions. Chur!

Max Penny
Queenstown, NZ.

"Proflow have been super important for me with bike setup. They're very professional and I love the fact they think outside the box to get the most out of suspension. I definitely couldn't have got my bike feeling the way it does without their help!"

George Brannigan
UCI Athlete.

Great service, on the spot repair. Highly recommend

Jade Power
Queenstown, NZ.

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