Head to head
Brian James Race Box vs Stewart GX 15 FT
The Stewart GX 15 FT is rated 12 tonnes heavier gross.
Last reviewed 13 September 2026
Key differences
- Gross weight: the Stewart GX 15 FT is rated 12 tonnes heavier gross.
Specifications side by side
| Brian James Race Box | Stewart GX 15 FT | |
|---|---|---|
| Gross weight | 3000kg | 15,000kg |
| Axles | Twin | 125mm dia., 10-stud, 420x180mm brakes |
| Payload | up to 1885kg | - |
| Internal width | 1.95m | - |
| Internal length | 4.0m / 4.5m / 5.0m | - |
| Length | - | 7,900-9,700mm (26-32ft) |
| Tare weight | - | 3,980kg |
| Tyres | - | 385/65Rx22.5 standard, 435/50Rx19.5 flotation option |
Sources: Brian James Race Box, Stewart GX 15 FT. 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 GX 15 FT if...
- you want one that is rated 12 tonnes heavier gross
A 15-tonne flat trailer from Scottish maker Stewart Trailers, built for farms and hire fleets moving bulky loads such as bales or machinery. The choice of standard or flotation tyres lets it be set up for road use or softer ground.
Listed by
- Rising Sun Trailer Hire - York
Common questions
What is the difference between the Brian James Race Box and the Stewart GX 15 FT?
The Stewart GX 15 FT is rated 12 tonnes heavier gross. The Brian James Race Box is a a fully enclosed twin-axle car transporter for classics and small race cars; the Stewart GX 15 FT is a twin-axle flat trailer for agricultural and general haulage use.
Can I tow the Brian James Race Box or the Stewart GX 15 FT on a car licence?
Stewart GX 15 FT is rated over 3,500kg gross, which is beyond what a car can tow in the UK.
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