The TDLZ (tunnel through-loading trailer) combines the advantages of a semi-trailer with those of a through-loading trailer. For loading and unloading at the ramp, its two units are pushed together. The driver can drive the two vehicles together without getting out of the cabin. This saves time and is convenient for the driver.

The truck-trailer transition is closed with a rubber sealing system so that temperature loss in the vehicle and in the cold store is greatly reduced during the loading process. This saves energy and reduces CO2 emissions (green logistics). Further advantages are weather and theft protection during loading and unloading as well as the reduction of noise during unloading in residential areas.

Standard equipment:

Running gear/frame

  • Welded steel frame
  • Rear closure with V-support to the chassis
  • Proprietary brand axles with disc brake
  • Air suspension with lifting and lowering
  • Tyres 385/65 R 22.5 or 385/55 R 22.5
  • Side guards aluminium, black, anodised
  • Wheel cover PVC anti-spray fenders
  • plastic chocks, 2 pcs


  • EBS 2S/2M; ABS, spring-loaded parking brake, supply connections yellow/red according to EC 17/320

Electrical system

  • Design 24 V with 15-pin plug connection
  • Multifunction rear lights according to EC
  • Outline marker lights LED with rubber arm
  • Navigation lights LED, white in front, red in the rear, LED side marker lights


  • Steel sandwich design 
  • Front wall reinforced with and without cutout for cooling unit
  • Floor with 5.5 - tons quiet running aluminium top
  • Side wall with load securing rail
  • Rear door stainless steel, glass bead blasted
  • Roof with LED ceiling lighting

Cooling unit

  • Front wall or underfloor units from leading brand manufacturers
  • Plastic fuel tank, 200 l

Tail lift

  • Standard hoist (2,000 kg) with aluminium platform, completely closing
  • Battery system 2x 12 V in plastic box


  • Frame hot-dip galvanised
  • Box coated with RAL 9010


  • Ramming protection 2 x roller bumpers
  • Rear step screwed and galvanised

Technical data

Permissible total weight:

40.000 kg

Superstructure dimensions:

Outer box length:

6.900 – 8.200 mm

Outer box width:

2.600 mm

Inner box width:

2.500 / 2.460 mm

Outer box height:

2.200 – 2.800 mm

Element widths:

Front wall:

40 / 60 mm

Side walls:

45 / 65 mm


85 / 125 mm


100 / 125 mm

Drive position -
Drive position
Through-loading position -
Through-loading position
Tunnel view -
Tunnel view
Optional equipment (examples):
  • Longitudinally adjustable transverse partitions

  • Sectional door with electrical drive

  • Rear doors/side doors

  • Air circulation control systems

  • Double-decker and load securing systems

  • Cold retention systems

  • Centralized electrical distribution cabinet

  • Lateral/height level control

  • Video reversing aid

  • Centralized control tool

  • Electronic ramp approach aid

  • Tail lift control from vehicle cabin

  • ATP certificate

  • Central lubrication system

  • Temperature recording

  • Swivelling rear step

  • Spring-loaded roller bumpers

Cold retention system -
Cold retention system
Sectional door -
Sectional door
Spring-loaded roller bumpers -
Spring-loaded roller bumpers
Swivelling rear step -
Swivelling rear step
Centralized control tool -
Centralized control tool
Level control -
Level control
Centralized electrical distribution cabinet -
Centralized electrical distribution cabinet
Video reversing aid -
Video reversing aid

Find out more about Tunnel through-loading trailer TDLZ

We are happy to help!

Further details and further equipment options can be found in the respective data sheets.

AIllustrations are symbolic and can display vehicles with optional equipment. Changes and errors excepted.

We at ROHR Spezialfahrzeuge work every day towards our most important goal, consistent, sustainable added value for our customers. We develop and produce our special vehicles according to the individual wishes of our customers and the high standards that distinguish our company. The competent support provided by our international sales and service network guarantees a high degree of customer satisfaction. Our efficient service centre guarantees flexible, intensive support and ensures the supply of spare and wear parts throughout the entire life cycle of our vehicles.