The SMT is a trailer mounted attenuator used to absorb rear-end impacts during stationary and mobile operations. The durable steel frame and crushable aluminum cartridges can absorb vehicles traveling up to 100km/hr. The SMT® is MASH Test Level 3 compliant and requires a minimum support vehicle weight of 12,000 lbs. (1080 kg).

In stock

Features & Benefits

  • Tested to MASH TL-3
  • Replaceable aluminum cartridges 
  • Ability to replace damage cartridges 
  • Heavy duty Torflex® axle and wheels
  • Arrow board mounting system available 
  • Attaches to a standard minimum 20 ton pintle hook


  • 40″ (1 m) height
  • 2,370 lbs. (1,080 kg)
  • 88″ (2.25 m) width at fenders
  • 20’ 2” (6.15 m) length back to center of pintle
  • 12,000 lbs. (5,454 kg) minimum support vehicle weight

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