Head to head
Brian James Race Box vs Richardson Trailers Supreme Treble
The Brian James Race Box is rated 300kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Brian James Race Box is rated 300kg heavier gross.
Specifications side by side
| Brian James Race Box | Richardson Trailers Supreme Treble | |
|---|---|---|
| Gross weight | 3000kg | 2,700kg |
| Payload | up to 1885kg | - |
| Internal width | 1.95m | - |
| Internal length | 4.0m / 4.5m / 5.0m | - |
| Axles | Twin | - |
| Capacity | - | 2 horses forward, 1 pony reversed |
| Unladen weight | - | 1,260kg |
| External dimensions | - | 5.40m long x 2.29m wide x 2.75m high |
| Internal dimensions | - | 3.54m long x 1.80m wide x 2.33m high |
Sources: Brian James Race Box, Richardson Trailers Supreme Treble. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Race Box if...
- you want one that is rated 300kg heavier gross
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 Supreme Treble if...
A three-berth Richardson trailer built for a household with two horses and a pony rather than a full string. The reversed pony bay keeps overall length down compared with three forward-facing berths, which suits smaller yards and tow vehicles.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
Common questions
What is the difference between the Brian James Race Box and the Richardson Trailers Supreme Treble?
The Brian James Race Box is rated 300kg heavier gross. The Brian James Race Box is a a fully enclosed twin-axle car transporter for classics and small race cars; the Richardson Trailers Supreme Treble is a trailer for two horses and a pony, one forward one reversed.
Can I tow the Brian James Race Box or the Richardson Trailers Supreme Treble 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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