The Intercomp Tyre Durometer/Tyre Tread Depth Gauge Set is a two piece set which includes a tyre durometer and a tyre tread depth gauge.Adjustable zero - reads from 0 to 100Type-A removable tipStorage case included for protectionThe Intercomp Tyre Durometer/Tyre Tread Depth Gauge Set includes two gauges which have been made with Aluminium and are supplied with a case for each.The surface of a Tyre becomes harder with every heat cycle, and even new Tyres of the same compound can vary a great deal in hardness. If a Tyre is too soft for the track, it will overheat and may not last the entire race. If it is too hard, it will not get up to the optimum temperature and traction will have to be sacrificed. Intercomp's Tyre Durometer enables you to make the correct tire selections for any track.