Why a JOST Modul landing gear set quietly carries the heaviest loads

Reviewed: ad hoc news Accessory & Components desk. Edited and checked on 2026-06-17, 15:13. Details in the imprint.

The JOST Modul landing gear set is one of those components that disappears in road spray and dust, yet decides whether a fully loaded semi-trailer stands safely or not. Crank in hand, a driver feels the smooth gearing and surprisingly light effort as 30 tons rest on steel feet.

What the Modul system does

The JOST Modul landing gear is a modular telescopic leg system for semi-trailers, designed to support parked trailers during loading, unloading, or uncoupled parking with high static loads and frequent height adjustments.

Typical sets consist of two legs connected by a cross shaft, each with an internal gearbox offering low and high speed for controlled lifting and fast extension.

Load capacity and daily handling

In its standard configuration, the Modul series offers a static load capacity of up to 180 tons per set, with an average lifting capacity of around 24 tons, depending on the specific variant.

In practice, that means a fully freighted curtainsider or reefer can rest on the legs while a forklift rattles in and out, and the crank still moves with manageable force for the driver.

Modular options for different fleets

The "Modul" name reflects a toolbox principle: JOST offers various foot types, crank options, mounting heights, and special features like outside or inside operation to match regional trailer standards and fleet preferences.

Fleet operators can thus specify landing gear tailored to tanker trailers, container chassis, or volume trailers rather than accepting a one-size-fits-all solution that may add unnecessary weight or complicate handling.

Protection, sealing, and durability

To survive Northern European winters and dusty Southern routes alike, the Modul legs use a closed construction with internal gearing, corrosion-protective coatings, and sealed gearboxes to keep dirt and water away from the mechanics.

Less contamination means lower wear and fewer expensive workshop visits, which matters when a trailer silently crosses borders every day and downtime directly eats into tight freight margins.

Installation and maintenance aspects

The landing gear is typically welded or bolted to the trailer chassis using standardized mounting brackets, which simplifies installation for trailer builders and allows retrofits of older units with more robust legs.

Routine maintenance boils down to visual inspection, lubrication of moving parts, and checking for damage to feet and cranks after rough yard use, a manageable effort for fleet workshops that already juggle brakes, lights, and telematics.

Where drivers notice differences

On the yard, drivers feel the difference between a worn generic leg and a well-adjusted Modul set immediately: the crank runs more evenly, shifting between low and high speed is defined, and the trailer feels stable instead of wobbling under lateral load.

In tight loading bays, that extra steadiness can be the small but decisive comfort factor that keeps the forklift driver relaxed and cargo damage low.

Position in JOST's portfolio and stock

Within JOST Werke SE's broad range of coupling systems, fifth wheels, and axles, the Modul landing gear is a quietly central component, especially for European and Asian semi-trailer builders who rely on durable undergear.

Shares of JOST Werke SE (DE000JST4000) trade in Frankfurt on Xetra; the stock gives investors indirect exposure to global freight volumes and trailer production cycles.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.