Wheel Back-to-back Gauge Wheel back to back gauge is used to measure the inner distance of railway locomotive and rolling stock wheelset. Readings are digital display. Specification Model GF982S Type Wheel Back-to-back Gauge Material Stainless Steel Dimensions (L x W x H) (mm) 123*10*11 cm Measuring range 1345-1365 mm Accuracy �±0.15mm Resolution 0.01 Customized Yes