Three-wheeled all-terrain vehicles, or Trike as they’re also called went a bit out of favorite at the moment the Quads became popular. A Quad is basically a four-wheeled all-terrain-vehicle and for short everybody now-a-day refer to the Quads as ATV.
In Thailand we have several companies that sell ATVs, from a super professional Polaris RZR XP Turbo with 168 horsepower to a 50cc Chinese made ATV that is probably limited to riding in the grass for its off-road capabilities.
Between a Chinese 50 ATV to a Polaris RZR XP dealers in Thailand have all sort of options. You can look at a few companies I know.
The first is ATV Lion (www.atvlion.com) don’t know much about them. The second is ATV Panther www.atv.co.th, which I know much better as they’re also the company behind the GPX motorcycle brand. If you looking for something really serious, you can always empty your wallet at www.polarisatvthailand.com (Polaris is a American brand name so be not surprised about the prices).