Head to head
Brian James A-Max 305 vs Ifor Williams HB510XL
The Ifor Williams HB510XL is rated 900kg heavier gross and carries 175kg more.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB510XL is rated 900kg heavier gross.
- Payload: the Ifor Williams HB510XL carries 175kg more.
Specifications side by side
| Brian James A-Max 305 | Ifor Williams HB510XL | |
|---|---|---|
| Gross weight | 2600kg | 3500kg |
| Payload | 2035kg | 2210kg |
| Internal bed | 4.3m x 1.96m | - |
| Unladen weight | - | 1290kg |
| Internal length | - | 4.25m |
| Internal width | - | 1.74m |
Sources: Brian James A-Max 305, Ifor Williams HB510XL. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the A-Max 305 if...
Suits owners of larger saloons or estate cars who have outgrown the shorter A-Max 210 but do not need a full car-transporter range trailer. The extra bed length and payload give more margin for a heavier road car.
Listed by
- A47 Barwell Trailers Sales Hire Service Ltd - Leicester, Barwell
Buy or hire the HB510XL if...
- you want one that is rated 900kg heavier gross
- you want one that carries 175kg more
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 Brian James A-Max 305 and the Ifor Williams HB510XL?
The Ifor Williams HB510XL is rated 900kg heavier gross and carries 175kg more. The Brian James A-Max 305 is a a longer, higher-capacity version of the A-Max flatbed car trailer; the Ifor Williams HB510XL is a an extra-length double horsebox trailer.
Which carries more, the Brian James A-Max 305 or the Ifor Williams HB510XL?
The Ifor Williams HB510XL, by 175kg.
Can I tow the Brian James A-Max 305 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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