It is from 18 to 20 cm in diameter and must have a minimum weight of 400g.
The hull has a minimum weight of 90 lbs so is very solid.
The minimum weight was reduced to 80 kg in the 1980s.
Until the late 1970s, manufacturers had to print the minimum weight or volume likely to be present.
There is a minimum weight also enforced dependent on the engine.
The minimum weight of the wife to be carried is 49 kilograms.
The minimum healthy weight for a woman your height is around 9st on standard charts.
In this way, stiff beams can be achieved with minimum weight.
Still, with high probability, there is a unique set that has minimum weight.
From that, they would determine a minimum safe weight for each wrestler.