The TS-2Di can be directly mounted onto most Park Tool Professional Truing Stands, offering precise measurement of a rim's lateral and radial runout. Each indicator features a specially-designed, non-marring tip that rides on the rim's sidewall or outer edge, accurately detecting deviations as small as 0.01 mm and displaying them on easy-to-read gauges. Adjustable range markers let you set your preferred tolerance range, helping you visualize your progress towards achieving perfect trueness. Compatible with the following Park Tool Professional Truing Stands: TS-2 TS-2.2 & TS-2.2P TS-2.3 TS-4 TS-4.2* *The TS-2DI cannot be used at the same time as the caliper fingers on the TS-4 or TS-4.2.