The Nuna TRIV has similar features to the bestselling Nuna MIXXX at a fraction of the size. Both strollers have features like a reversible seat, ample storage space, and are easy to turn into a travel system using Nuna’s ring adapter. But the TRIV is the lightest and most compact Nuna stroller and it folds using only one hand. Meanwhile, the MIXX has more seating options and it has larger, sturdier wheels that give it a smoother ride over rough terrain. Let’s go over the differences.