Head to head
Anssems GT500-151 vs Ifor Williams HB510XL
The Ifor Williams HB510XL is rated 3 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB510XL is rated 3 tonnes heavier gross.
Specifications side by side
| Anssems GT500-151 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 500kg | 3500kg |
| Internal dimensions | 151cm x 101cm x 48cm | - |
| Unladen weight | - | 1290kg |
| Payload | - | 2210kg |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Anssems GT500-151, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GT500-151 if...
A light trailer for camping gear, luggage and small DIY loads, towable behind almost any car. The hard-top version is the one most buyers want, because weatherproof and lockable is the whole reason to choose this over a builders trailer.
Full GT500-151 specifications →Buy or hire the HB510XL if...
- you want one that is rated 3 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 Anssems GT500-151 and the Ifor Williams HB510XL?
The Ifor Williams HB510XL is rated 3 tonnes heavier gross. The Anssems GT500-151 is a small single-axle luggage and general purpose trailer; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Can I tow the Anssems GT500-151 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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