Limited Edition Mini 4WD Product Mini 4WD Setting Gauge (Red) Item No:95073 ★Don't leave things to chance when you enter official Mini 4WD races; invest in this gauge, which allows the measurement of a number of different parts to check compliance with official regulations. ★Measures overall width, overall height, ground clearance, plus tire width/diameter. The information on this page is current as of October 17, 2014. Specifications are subject to change without notice.