TR for heavy distribution transport

TR Mechanical Steering System

The TR steering arrangement is a mechanical system which is used primarily in heavy distribution transport. This system steers one, two or three axles on a one to five axle trailer.

The TR steering system allows the operator to make more efficient use of their trailer through improved manoeuvrability, making inner city deliveries easier and providing the ability to negotiate small roundabouts on urban roads. 

Common applications of the TR steering system are transport of construction material, tippers and tankers.

Savings on

  • Time, through better manoeuvrability 
  • Fuel consumption
  • Tyre wear
  • Vehicle maintenance
  • Vehicle damage

Steering principle

While making a turn, the movement between the truck and trailer is transmitted by the fifth wheel plate, locked into the fifth wheel coupling by the steering wedge. From the fifth wheel unit two steering rods transmit this steering motion directly and without any play to the rear axle mounting frame. In case more than 1 axle is steered the steering motion from the rear axle is transmitted to the other axle(s) with two steering rods

TR for heavy distribution transport


  • A TR system enables you to steer 1, 2 or 3 axles on a 1 to 5 axle trailer.
  • Also available for trailers with a gooseneck.
  • RDW test report according EEC guideline (70/311) for most common TR configurations 1 to 2 axles steered, available at request (no. 56210050).
  • Special TRIDEC spline bolts used for most bolt connections. No loosening of bolts and re-tightening not necessary.  
  • Gross weight: 750-1770 kg (1-3 axles steered). Net weight of steering system is reduced due to the replacement of a conventional rubbing plate with the TRIDEC fifth wheel unit and modifications to rear of chassis to accommodate the turntable.
  • Possible steering angles: up to 45º.
  • Components: fifth wheel unit, steering rods, axle mounting frame(s).