Are adjustable dumbbells better than traditional dumbbells? In short, adjustable dumbbells offer a number of advantages that may make them a better choice for some users. First, they tend to be more versatile, because they can be adjusted to different weights and heights. This means that they can be more effectively used by people of different weights and body types. Second, they are more comfortable to use, because they are adjustable to fit different hand sizes. Finally, adjustable dumbbells are generally less expensive than traditional dumbbells.