Head to head
Brian James Race Box vs Ifor Williams LM166
The Ifor Williams LM166 carries 820kg more and is rated 500kg heavier gross.
Last reviewed 13 September 2026
Key differences
- Payload: the Ifor Williams LM166 carries 820kg more.
- Gross weight: the Ifor Williams LM166 is rated 500kg heavier gross.
Specifications side by side
| Brian James Race Box | Ifor Williams LM166 | |
|---|---|---|
| Gross weight | 3000kg | 3500kg |
| Payload | up to 1885kg | 2705kg |
| Internal width | 1.95m | - |
| Internal length | 4.0m / 4.5m / 5.0m | - |
| Axles | Twin | - |
| Unladen weight | - | 795kg |
| Internal bed | - | 4.77m x 1.98m |
Sources: Brian James Race Box, Ifor Williams LM166. 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 LM166 if...
- you want one that carries 820kg more
- you want one that is rated 500kg heavier gross
Bought by contractors and hauliers who regularly carry longer loads, such as fencing materials or several pallets, and need more deck length than the LM106 or LM126 provide.
Listed by
- G-Tec Trailers - Thetford, Holme Hale
- Blains Trailers & Tyres - Hemel Hempstead, Great Gaddesden
Common questions
What is the difference between the Brian James Race Box and the Ifor Williams LM166?
The Ifor Williams LM166 carries 820kg 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 LM166 is a a long-bed flatbed trailer.
Which carries more, the Brian James Race Box or the Ifor Williams LM166?
The Ifor Williams LM166, by 820kg.
Can I tow the Brian James Race Box or the Ifor Williams LM166 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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