Twin-Wheel Models
A Twin-Wheel Distance Measuring Wheel will offer superior stability and greater accuracy. It needs less guiding and is less likely to deviate from a straight line, therefore, if used on a compatible surface, it can offer better accuracy. A single wheel model is more easily affected by the user's ability and concentration, as well as surface irregularities which can lead to the deviation from a straight line adding unwanted distance to a measurement. Of course, on rougher surfaces like dirt or grass, you would want to select a Measuring Wheel that has some size to it such as 6 inches diameter and above.