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For a heavy full trailer, the maximum rear overhang including its load is the lesser of:
重型全挂车连同所载货物，其最大允许后悬长度应取以下哪组数值中的较小值？
For a standard heavy full trailer and its load, maximum rear overhang is the lesser of 4 metres and 50% of the wheelbase.
标准重型全挂车连同货物，后悬不得超过4米与轴距50%中的较小值。
阅读相关知识
Measure from the rear axis to the rearmost part of the vehicle or load, not from the end of the body. Full trailers and semi-trailers have different limits.
后悬从后轴基准线量到车辆或货物最后端，不能从车厢尾端开始算。全挂车和半挂车采用不同限制，不可混用。