Head to head
Brian James A-Max 305 vs Ifor Williams HB511
The Ifor Williams HB511 is rated 100kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Ifor Williams HB511 is rated 100kg heavier gross.
Specifications side by side
| Brian James A-Max 305 | Ifor Williams HB511 | |
|---|---|---|
| Gross weight | 2600kg | 2,700kg |
| Payload | 2035kg | - |
| Internal bed | 4.3m x 1.96m | - |
| Unladen weight | - | 1,000kg |
| Internal length | - | 3.52m |
| Internal width | - | 1.79m |
| Brakes | - | Braked |
Sources: Brian James A-Max 305, Ifor Williams HB511. 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 HB511 if...
- you want one that is rated 100kg heavier gross
The wider step up from the HB506, for larger horses or owners who want more room in transit. The extra 12cm of internal width and 36cm of length cost 80kg unladen, which is worth checking against your tow vehicle before choosing it over the HB506.
Listed by
- Trek-Trailers Lincolnshire - Doncaster, Belton
- Trek-Trailers Suffolk - Bury Saint Edmunds
- R M Trailer Centre - Middlesbrough, North Ormesby
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
- Horse Trailer Sales - Robertsbridge, Staplecross
- Trek-Trailers Three Counties - Hereford
Common questions
What is the difference between the Brian James A-Max 305 and the Ifor Williams HB511?
The Ifor Williams HB511 is rated 100kg heavier gross. The Brian James A-Max 305 is a a longer, higher-capacity version of the A-Max flatbed car trailer; the Ifor Williams HB511 is a two-horse trailer, twin axle, wider body.
Can I tow the Brian James A-Max 305 or the Ifor Williams HB511 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.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.