Head to head
Humbaur HTK vs Stewart GX 18-23 S
The Stewart GX 18-23 S is rated 16.5 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Stewart GX 18-23 S is rated 16.5 tonnes heavier gross.
Specifications side by side
| Humbaur HTK | Stewart GX 18-23 S | |
|---|---|---|
| Gross weight | 3500kg | 20,000kg |
| Axles | Twin | 125mm dia., 10-stud, 420x180mm brakes |
| Payload | 2550kg | - |
| Internal bed | 3.14m x 1.75m | - |
| Brakes | Braked | - |
| Body size | - | 6,700 x 2,450 x 1,500mm |
| Cubic capacity | - | 23m3 grain, 39m3 silage |
| Tare weight | - | 5,900kg |
Sources: Humbaur HTK, Stewart GX 18-23 S. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HTK if...
A heavy-duty three-way tipper for builders' merchants and groundworkers who need to tip to either side as well as the rear. The wide model line (2000kg to 3500kg gross) lets buyers pick a size without moving to a different range.
Listed by
- Trek-Trailers Three Counties - Hereford
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
Buy or hire the GX 18-23 S if...
- you want one that is rated 16.5 tonnes heavier gross
An 18-23 tonne tipping trailer built for grain and silage haulage, with an easy-sheet system so one person can cover a loaded trailer without climbing on top. Its monocoque steel body gives it the extra capacity over Stewart's standard flat trailers.
Listed by
- Rising Sun Trailer Hire - York
Common questions
What is the difference between the Humbaur HTK and the Stewart GX 18-23 S?
The Stewart GX 18-23 S is rated 16.5 tonnes heavier gross. The Humbaur HTK is a a tandem-axle three-way tipping trailer for construction and agricultural use; the Stewart GX 18-23 S is a twin-axle tipping grain and silage trailer with an easy-sheet cover system.
Can I tow the Humbaur HTK or the Stewart GX 18-23 S on a car licence?
Stewart GX 18-23 S is rated over 3,500kg gross, which is beyond what a car can tow in the UK.
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