The rear side weights come as a pair, one for each side of the machine. Their weight is 400 lbs (200 lbs each), and the weights increase the practical lift capacity. For example with 600 series you can handle as much as 2200 lbs loads.
Rear side weights are mounted behind the rear wheels and they don’t make the machine wider or longer when the machine is equipped with 26*12.00-12 wheels (standard wheels on 600 series).
More lift capacity without increasing the width or length of the machine