Ergonomic casters are designed for ease of movement. Ergonomic casters prevent strain injuries which develop over time and can case injuries or even long term disability. These casters are superior and require less effort to start the cart in motion and will ease the efforts need when turning
Many factors come into play when considering an Ergonomic Caster such as,
Wheel Hardness: the harder the material the easier it will roll.
Wheel diameter: The larger the diameter the easier it will roll.
Swivel Lead: The longer the swivel lead the easier the cart will be to turn.
Wheel Profile: The shape of the wheel profile can also affect how much for it take to start the caster in motion. Flat face wheels require more force to start the caster in motion.