Head to head
Humbaur Steely vs Stewart GX 15 FT
The Stewart GX 15 FT is rated 14,250kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Stewart GX 15 FT is rated 14,250kg heavier gross.
Specifications side by side
| Humbaur Steely | Stewart GX 15 FT | |
|---|---|---|
| Gross weight | 750kg | 15,000kg |
| Payload | 630kg | - |
| Inner length | 2050mm | - |
| Inner width | 1095mm | - |
| Length | - | 7,900-9,700mm (26-32ft) |
| Tare weight | - | 3,980kg |
| Axles | - | 125mm dia., 10-stud, 420x180mm brakes |
| Tyres | - | 385/65Rx22.5 standard, 435/50Rx19.5 flotation option |
Sources: Humbaur Steely, Stewart GX 15 FT. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Steely if...
The Steely is Humbaur's budget single-axle trailer, built with a hot-dip galvanised chassis as what the manufacturer describes as an entry point into trailer ownership. It suits light garden, construction-site and hobby loads rather than heavier trade use.
Full Steely specifications →Buy or hire the GX 15 FT if...
- you want one that is rated 14,250kg heavier gross
A 15-tonne flat trailer from Scottish maker Stewart Trailers, built for farms and hire fleets moving bulky loads such as bales or machinery. The choice of standard or flotation tyres lets it be set up for road use or softer ground.
Listed by
- Rising Sun Trailer Hire - York
Common questions
What is the difference between the Humbaur Steely and the Stewart GX 15 FT?
The Stewart GX 15 FT is rated 14,250kg heavier gross. The Humbaur Steely is a a small, unbraked single-axle flatbed trailer aimed at first-time buyers and light garden/site use.; the Stewart GX 15 FT is a twin-axle flat trailer for agricultural and general haulage use.
Can I tow the Humbaur Steely or the Stewart GX 15 FT on a car licence?
Stewart GX 15 FT is rated over 3,500kg gross, which is beyond what a car can tow in the UK.
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