There are over 2800 different types of mini diggers on the market today. However there are only two main construction types for rubber tracks – Conventional Rubber Tracks and Interchangeable Rubber Tracks. Conventional mini digger rubber tracks can only be operated on undercarriages designed for rubber tracks only. The tracks are manufactured with a pitch measurement in mm of: 60 - 72 - 84 - 86 - 87 - 90 - 100 - 125 - 150 Interchangeable excavator rubber tracks can be used on undercarriages designed to operate steel and rubber tracks. Interchangeable mini digger tracks can be made in a long pitch or short pitch style track, the short pitch design helps to reduce vibration when operating a machine in second speed. These tracks are manufactured with pitch measurements of: Short Pitch 48 - 52.5 - 54 - 55 - 56 - 71 - 72.5 - 73 - 81 - 81.5 - 83 Long Pitch 96 - 106 - 107 - 109 - 142 - 144 - 163 - 167