Answer:
Traditionally, manufacturers used the weight of the shuttlecock to categorize them. Most shuttlecock tubes were marked numbers from 48 to 52. So, if the shuttlecock is categorized as 50, it means its weight is 5.0 grams. But it led to several inaccuracies. Later, speed was used as a differentiating factor. The speed of the shuttlecock lets a player know how fast and far it will go. Just as colored labels are used to differentiate nylon shuttlecocks on the basis of speed, feather birdies come with numbers to help you identify its speed. Let’s learn what different numbers on the tube of feather shuttlecocks mean:
