In reply to ewar woowar:
> >a 6m tri should be around the 1200kg mark.
> How old is the boat?
> If it's more than a couple of years old it will weigh more than the listed weight due to water soaked into in the hull.
Definitely, I towed a supposed 1 ton, 7M wooden yacht, straight out of the water from Plymouth up the length of the country, a couple of years ago, fair shitting it for most of the journey. For added joy it was fixed keel and sitting nearly 3ft above the trailer bed.
To the OP, I would definitely check the weight again, it sounds heavy. An 8M Telstar trimaran would only come in at that sort of weight and that is quite heavy, with the folding mechanism and stuff.
Still, with the trailer, twin wheeled I hope, you may be not far off.
How are you getting the boat on the trailer? If you're only going places with a lift then a van might do but if you're going anywhere near the water, I'd use a 4x4 and put another tow bar on the front to make life a lot easier. Coastal recovery is hard enough as it is.