With this mountain bike tricycle for adults, you can always stay in control, even in rough terrain. The movement stimulates your circulation, strengthens your muscles and grants you mobility and joy in living. Mountain trikes are not only a great option for riding down a mountain or around town, but are becoming quite popular. Sturdy steel construction supports capacity up to 350 lbs. 3-wheeler design means you'll always have a consistent ride and a frame that'll stay sturdy and steady. Sturdy steel construction supports capacity up to 350 lbs. 3-wheeler design means you'll always have a consistent ride and a frame that'll stay sturdy and steady.