|Over 30 years of proven professional performance, with precision and durability. Precision totalizer automatically records up to 100,000'. Wide Neoprene tire provides positive traction. Automatic brake prevents accidental backtracking. Built-in stand keeps wheel in upright position. Spokes are set at 2-1/4 “ for estimating measurements less than 1'. Choice of Equipment: Orange or Safety-Glo enamel finish. Wheel circumference 4'; diameter 15-1/2'.