You can have more than one person ride it because it's a big mount, have one person stand on a trikes back and another use the saddle and have 2 people on it. Me and my sisters do this to get around a lot. Hope this was helpful!
I can not stress enough to my friends how useful the trike is. Early game it makes a great pack animal. Late game in groups of three or four it can be used as a decent battle mount. Taming a trike early on can be a great way to start a large base and keep you well fed with berries.