Wheel track, wheelbase, wheeloffset and Set-Back measurement.
轮距，轴距，轮偏移和轴偏移测量。
2
This tool allows you to calculate the actual trail of a bike, given the wheel size, the fork's offset, and the head tube Angle.
这个工具可以让你计算实际线索自行车，由于车轮大小，交岔路口的偏移，并负责管角。
3
Offset driving wheel in combination with castor wheel increase stability of truck during lifting, while minimize the maintenance frequency compared to a single central wheel.