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Al-ko IRS Shock Absorber

$117.94$133.95 inc GST

or 4 fortnightly payments from $29.49 with Afterpay More info

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Al-ko IRS Shock Absorber

Al-ko IRS Shock Absorber (Blue) and(Red) are suitable for IRS axle groups only.

  • Blue rating is 1350kg per axle
  • Red rating is 2000kg per axle

Blue shock absorbers operate in reverse to standard shock absorbers and are therefore ineffective for standard beam axles.

Caravan service agents should be checking shock absorbers on all IRS trailers and caravans. We would also recommend this equipment to be installed on IRS suspension installed on boat trailers.

irs blue shock absorberWhen dampeners are worn or loose compression or lose rebound compression, they should be replaced. 

For a long time drivers have been worried about trailer vibrations on uneven roads. Until now, conventional standard shock absorbers have barely delivered a noticeable improvement in driving safety.

They are designed for a weight range that is too large (for example 0 to 4.0 t). Medium trailer weights (2.0 t) achieves optimum damping.

Damping in the lower weight range is excessive, causing trailer bumps and jolts, while the damping in the upper weight range is inadequate.

AL-KO Octagon axle shock absorbers, on the other hand, improve the trailer’s drive characteristics and provide optimum damping – thanks to precise, weight-based, tuning.

Your advantage

  • Ideal damping
  • Direct reduction of dangerous jolts
  • Greater driving stability
  • Greater braking stability
  • Optimum ground contact

How to replace shock absorbers

Two bolts secure the Alko blue shock absorber into position, and it is a relatively straightforward operation to remove them. To test rebound simply close a fully opened shock absorber. If your blue shock absorber closes efficiently, then it needs replacement.

The tell-tale signs of a worn shock absorber are the degree of stone chips. These stone chips can puncture as mention before; however, they are an excellent indication of shock absorber wear.


  • Fully Open – 380mm
  • Fully Closed – 250mm
  • Opening Compression – 20% Resistance
  • Closing Rebound – 80% Resistance
  • Bolt Size 12mm
  • Offset Bushes

News article, how long do shock absorbers last.

Click this link to learn more about IRS axles.

Couplemate Trailer Parts sells only the best quality Al-ko IRS Shock Absorber and caravan spare parts throughout Australia.

Customers are welcome to either pickup or take advantage of our low freight rates. Express shipping to Melbourne, Sydney, Brisbane, Perth, Adelaide, Darwin, and Hobart.

We also ship products to New Zealand via Australia Post Air Express.

© Steve Wotherspoon December 10, 2019. Images and text may be copied, provided a link back to the copied page and the source is displayed where the content or image is located.

Last Updated on

Additional information

Weight 1 kg
Dimensions 30 × 10 × 10 cm
IRS Shock Absorber Size



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