Head to head
Ifor Williams HB403 vs Sun Way Galaxy G510M16
The Sun Way Galaxy G510M16 is 577kg lighter empty. The Ifor Williams HB403 is rated 1.1 tonnes heavier gross and carries 273kg more.
Last reviewed 13 September 2026
Key differences
- Unladen weight: the Ifor Williams HB403 weighs 577kg more empty.
- Gross weight: the Ifor Williams HB403 is rated 1.1 tonnes heavier gross.
- Payload: the Ifor Williams HB403 carries 273kg more.
Specifications side by side
| Ifor Williams HB403 | Sun Way Galaxy G510M16 | |
|---|---|---|
| Gross weight | 1600kg | 500 / 600 / 650 / 750 kg (modular rating) |
| Unladen weight | 767kg | 190 kg |
| Payload | 833kg | up to 560 kg |
| Internal length | 3.08m | - |
| Internal width | 1.30m | - |
| Length | - | 470 - 600 cm |
| Width | - | 181 cm |
| Axles | - | Single, unbraked |
| Suitable boat length | - | up to 4.80 m |
Sources: Ifor Williams HB403, Sun Way Galaxy G510M16. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the HB403 if...
- you want one that is rated 1.1 tonnes heavier gross
- you want one that carries 273kg more
The smallest trailer in the HB horsebox range, bought by owners of a single horse or a couple of ponies who want the lightest legal option that can still be towed by a mid-size car.
Listed by
- Horse Trailer Sales - Robertsbridge, Staplecross
- Barnwell Trailers Ltd - Peterborough, Oundle, Barnwell
Buy or hire the Galaxy G510M16 if...
- you want one that is 577kg lighter empty
The Galaxy G510M16 suits owners of small motorboats up to about 4.8m, using a multi-roller bed rather than bunks so the hull can be winched on and off easily at a slipway. Its modular rating up to 750kg gross weight lets an owner choose the plate that matches their towing licence.
Listed by
- Lider Trailers - Accrington, Blackburn
Common questions
What is the difference between the Ifor Williams HB403 and the Sun Way Galaxy G510M16?
The Sun Way Galaxy G510M16 is 577kg lighter empty. The Ifor Williams HB403 is rated 1.1 tonnes heavier gross and carries 273kg more. The Ifor Williams HB403 is a a compact single-horse or two-pony horsebox trailer; the Sun Way Galaxy G510M16 is a a single-axle multi-roller boat trailer from French manufacturer Sun Way, built for launching and recovering small motorboats..
Which is lighter, the Ifor Williams HB403 or the Sun Way Galaxy G510M16?
The Sun Way Galaxy G510M16. It is 577kg lighter empty than the Ifor Williams HB403.
Which carries more, the Ifor Williams HB403 or the Sun Way Galaxy G510M16?
The Ifor Williams HB403, by 273kg.
Can I tow the Ifor Williams HB403 or the Sun Way Galaxy G510M16 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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