Head to head
Ifor Williams HB506 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 HB506 | Stewart GX 15 FT | |
|---|---|---|
| Gross weight | 2,600kg | 15,000kg |
| Unladen weight | 920kg | - |
| Internal length | 3.16m | - |
| Internal width | 1.67m | - |
| Brakes | Braked | - |
| 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 HB506, Stewart GX 15 FT. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB506 if...
The mainstream two-horse trailer in Britain, used by private owners and small yards. Its comparatively low unladen weight for the class is the practical point: it widens the range of 4x4s and large SUVs that can legally and comfortably tow it.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
- Horse Trailer Sales - Robertsbridge, Staplecross
- 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 HB506 and the Stewart GX 15 FT?
The Stewart GX 15 FT is rated 12.4 tonnes heavier gross. The Ifor Williams HB506 is a two-horse trailer, twin axle; the Stewart GX 15 FT is a twin-axle flat trailer for agricultural and general haulage use.
Can I tow the Ifor Williams HB506 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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