Head to head
Erde PM320 vs Ifor Williams HB403
The Erde PM320 is 707kg lighter empty. The Ifor Williams HB403 is rated 1.3 tonnes heavier gross and carries 597kg more.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB403 weighs 707kg more empty.
- Gross weight: the Ifor Williams HB403 is rated 1.3 tonnes heavier gross.
- Payload: the Ifor Williams HB403 carries 597kg more.
Specifications side by side
| Erde PM320 | Ifor Williams HB403 | |
|---|---|---|
| Gross weight | 300kg | 1600kg |
| Unladen weight | 60kg | 767kg |
| Payload | 236kg | 833kg |
| Internal bed | 200 x 112cm | - |
| Internal length | - | 3.08m |
| Internal width | - | 1.30m |
Sources: Erde PM320, Ifor Williams HB403. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the PM320 if...
- you want one that is 707kg lighter empty
Near-identical to the PM310, rated for slightly heavier motorcycles up to 236kg. The two are the same trailer to look at, so the number to check before buying is the wet weight of the bike you intend to carry.
Listed by
- 1Stop Trailers Ltd - Sudbury, Little Waldingfield
- Trailer Centre - Rowley Regis
Buy or hire the HB403 if...
- you want one that is rated 1.3 tonnes heavier gross
- you want one that carries 597kg more
The smallest trailer in the HB horsebox range, bought by owners of a single horse or a couple of ponies who want the lightest legal option that can still be towed by a mid-size car.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Common questions
What is the difference between the Erde PM320 and the Ifor Williams HB403?
The Erde PM320 is 707kg lighter empty. The Ifor Williams HB403 is rated 1.3 tonnes heavier gross and carries 597kg more. The Erde PM320 is a a small unbraked single-axle trailer for carrying one motorcycle.; the Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer.
Which is lighter, the Erde PM320 or the Ifor Williams HB403?
The Erde PM320. It is 707kg lighter empty than the Ifor Williams HB403.
Which carries more, the Erde PM320 or the Ifor Williams HB403?
The Ifor Williams HB403, by 597kg.
Can I tow the Erde PM320 or the Ifor Williams HB403 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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