Head to head
Ifor Williams GD85 vs Ifor Williams HB510XL
The Ifor Williams GD85 is 895kg lighter empty. The Ifor Williams HB510XL is rated 2.1 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB510XL weighs 895kg more empty.
- Gross weight: the Ifor Williams HB510XL is rated 2.1 tonnes heavier gross.
Specifications side by side
| Ifor Williams GD85 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 1,400kg single axle / 2,700kg twin axle | 3500kg |
| Unladen weight | 395kg single axle / 485kg twin axle | 1290kg |
| Internal bed | 2.5m x 1.58m (8ft 2in x 5ft 2in) | - |
| Brakes | Braked, auto-reverse over-run | - |
| Payload | - | 2210kg |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Ifor Williams GD85, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GD85 if...
- you want one that is 895kg lighter empty
The entry point of the Ifor Williams general duty range and one of the most common working trailers in Britain. Smallholders, gardeners and tradespeople buy it for everyday hauling without needing a heavy tow vehicle, and the twin-axle version roughly doubles the payload for a modest gain in unladen weight.
Full GD85 specifications →Buy or hire the HB510XL if...
- you want one that is rated 2.1 tonnes heavier gross
For owners of taller or longer horses who find the standard HB511 too tight, giving extra internal length on the same 3500kg chassis so it stays towable by a suitably rated 4x4.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Ifor Williams GD85 and the Ifor Williams HB510XL?
The Ifor Williams GD85 is 895kg lighter empty. The Ifor Williams HB510XL is rated 2.1 tonnes heavier gross. The Ifor Williams GD85 is a general duty box trailer, single or twin axle; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which is lighter, the Ifor Williams GD85 or the Ifor Williams HB510XL?
The Ifor Williams GD85. It is 895kg lighter empty than the Ifor Williams HB510XL.
Can I tow the Ifor Williams GD85 or the Ifor Williams HB510XL on a car licence?
Yes, as far as the licence goes. Both are rated at or under 3,500kg gross, and a car (B) licence has covered towing up to 3,500kg since 16 December 2021. Your car still has to be rated to tow the loaded weight - check the handbook or the VIN plate.
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