How to measure Gas Struts

Step 1 – Extended Length

Measure the gas strut from middle of end fitting to the middle of the end fitting when gas strut is fully extended
How to measure gas struts


Step 2 – Diameter

  • Measure across the Rod/Shaft
  • Measure across the canister (not around, across)

We have 4 sizes in gas struts – 325mm, 500mm, 575mm and 830mm. All have a 10mm shaft and 22mm tube size. The shaft size differs on each length strut so check our individual listings. Each size above is linked to the individual listing page. 

How to measure gas struts
How to measure gas struts


Step 3 – Newton Meters or Force

There are few ways to work out the Newton Meters (Nm).


  • Look – there may be a number followed by NM or N on the gas strut.
  • Weigh – Grab a pole and the bathroom scales, pop up boot/bonnet with pole in line with gas struts, remove struts & then place end of the pole onto the scales. This will tell you in Kg how heavy the door. Basic conversion is 1kg = 10NM so 10 kg = 100NM
  • Contact the manufacturers of the strut, vehicle or trailer
How to measure


Step 4 – End Fittings

All Fineline Fabrications Gas Struts come complete with steel ball fittings.  However, if you aren’t sure please take a photo and email us on