Head to head
Brian James Race Box vs Ifor Williams GX125 HD
The Ifor Williams GX125 HD carries 855kg more and is rated 500kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams GX125 HD carries 855kg more.
- Gross weight: the Ifor Williams GX125 HD is rated 500kg heavier gross.
Specifications side by side
| Brian James Race Box | Ifor Williams GX125 HD | |
|---|---|---|
| Gross weight | 3000kg | 3500kg |
| Payload | up to 1885kg | 2740kg |
| Internal width | 1.95m | - |
| Internal length | 4.0m / 4.5m / 5.0m | - |
| Axles | Twin | - |
| Unladen weight | - | 760kg |
| Internal bed | - | 3.66m x 1.57m |
Sources: Brian James Race Box, Ifor Williams GX125 HD. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Race Box if...
Positioned for classic car owners and smaller motorsport teams who want their car fully enclosed and weatherproof but do not need the wider bed of the Race Sport or Race Transporter ranges. The narrower internal width suits a single classic or compact race car rather than a modern GT car.
Listed by
- Formula Trailers,, Brian-James Trailers Main Dealer in the SW UK - Wellington, Poole
Buy or hire the GX125 HD if...
- you want one that carries 855kg more
- you want one that is rated 500kg heavier gross
For plant hire firms carrying longer machines such as excavators with extended dipper arms or tracked dumpers that need the extra bed length over the GX105HD.
Listed by
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Common questions
What is the difference between the Brian James Race Box and the Ifor Williams GX125 HD?
The Ifor Williams GX125 HD carries 855kg more and is rated 500kg heavier gross. The Brian James Race Box is a a fully enclosed twin-axle car transporter for classics and small race cars; the Ifor Williams GX125 HD is a a longer heavy-duty plant trailer.
Which carries more, the Brian James Race Box or the Ifor Williams GX125 HD?
The Ifor Williams GX125 HD, by 855kg.
Can I tow the Brian James Race Box or the Ifor Williams GX125 HD 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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