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EXT Shock Servicing & Upgrades

EXT MTB shocks are high performance weapons straight out of the box so there is little you can do to enhance the performance other than regular servicing and a custom tune to set them up to you, your bike and your riding style.

Once tuned these shocks will make your bike feel amazing even through the roughest terrain.

ProFlow Suspension is the official service centre for EXT New Zealand and we deal direct with EXT so have easy access to parts and can tap into their suspension tuning genius.

ProFlow has the only license to tune EXT in NZ so make sure you book in with us when you need your EXT suspension serviced.

Shock Service



  • Full strip-down
  • Close inspection and thorough cleaning of all components
  • Rebuild with new genuine manufacturers seals (unless specified otherwise) 
  • Vacuum bleed (some dampers are hand bleed) with high-performance oils
  • Recharged with Nitrogen
  • Function test with CTW Dyno / leak test
  • Return to pre-service settings
  • Function test with CTW Dyno


Cane Creek Air Shock: $280
Fox Float X2: $280
Rockshox Vivid Air: $280
Ohlins (all products): $300
EXT Racing Shox: $280


  • Standard service plus 
  • Dyno damper test pre strip down 
  • More in depth testing to examine what the shock is doing at any point in time and match the shock/fork to the bike and rider style.


Cane Creek Air Shock: $360
Fox Float X2: $360
Rockshox Vivid Air: $360
Ohlins (all products): $365
EXT Racing Shox: $360

Understanding Your

Bike Shock

Air Springs

Air springs are the most common in most modern shocks except for downhill specific shocks. The coil springs tend to weight more so they're not so desirable on bikes you want to pedal. The air spring offers more fine tuning ability than the coil too.

Within an air spring are 2 air chambers; the positive air chamber works to resist the weight of the rider, as the shock compresses so does the air in the positive chamber which creates the spring. The negative chamber work in the opposite way to the positive which helps the shock push into its travel against the positive air. Negative air makes the shock respond more effectively over small bumps making the ride smoother.


The damper body acts as the seal for the air spring so it's really important to keep this clean and scratch free. It also houses the damper fluid which is what controls the compression and rebound of the shock. The damper adjustments are controlled by external dials which control how freely the fluid moves between the damper ports. Having the correct settings for your shock will ensure the shock is working to its optimum for your weights and riding style and maintains rear wheel traction through bumps and corners. Within the damper you'll also find the IFP (internal floating piston) which is what separates the nitrogen from the damper fluid.


It's important to get the rebound of your shock set up correctly because if it's too slow, your shock won't have rebounded fully before the next impact which will make the back end of your bike feel harsh and send impact through your feet. Too much rebound and you'll get bucked out of every compression and feel like you're going OTB. Having the rebound set correctly will increase traction through the rear wheel.