Common gadgets for wheel upgrade and modification. PCD gauge, PCD measuring disc, medium hole measuring tool, thread gauge, measure bolts and nuts, Wheel hub installation positioning pin.
1. PCD gauge
2. PCD measuring disc
3. Medium hole measuring tool, cylindrical stepped tool made of hard engineering plastics
4. Thread gauge: one end is convex thread, the other end is concave thread. Measure bolts and nuts separately. Various sizes, metric and imperial.
5. Wheel hub installation positioning pin: It is difficult to align the wheel hub (especially when adding spacers).