Head to head
Ifor Williams HBX506 vs Stewart GX 15 FT
The Stewart GX 15 FT is rated 12.4 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Stewart GX 15 FT is rated 12.4 tonnes heavier gross.
Specifications side by side
| Ifor Williams HBX506 | Stewart GX 15 FT | |
|---|---|---|
| Gross weight | 2600kg | 15,000kg |
| Unladen weight | 865kg | - |
| Payload | 1735kg | - |
| Internal length | 3.26m | - |
| Internal width | 1.67m | - |
| 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: Ifor Williams HBX506, Stewart GX 15 FT. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HBX506 if...
A mid-size horsebox for owners moving one or two horses who want the updated HBX styling and features rather than the standard HB range trailer.
Listed by
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
- East Midlands Trailers - Leicester, Thrussington
- R M Trailer Centre - Middlesbrough, North Ormesby
Buy or hire the GX 15 FT if...
- you want one that is rated 12.4 tonnes 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 Ifor Williams HBX506 and the Stewart GX 15 FT?
The Stewart GX 15 FT is rated 12.4 tonnes heavier gross. The Ifor Williams HBX506 is a a double horsebox trailer from Ifor Williams' HBX range; the Stewart GX 15 FT is a twin-axle flat trailer for agricultural and general haulage use.
Can I tow the Ifor Williams HBX506 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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