If it's only 30 kilograms, then a pair is 60 kilograms, which is hard to buy in the market. A while ago, I just bought a pair of dumbbell rods with a length of 50cm, black coated dumbbell pieces, 5kg 8 pieces, 2kg 8 pieces, 1kg 4 pieces, with a total weight of 60 kg. I bought it online. The easiest way to operate is to buy a pair of extended dumbbell bars (45 cm or 50 cm) from the Internet and then buy them from the local cultural and sports wholesale market. Dumbbell bars are generally not only sold, but also not heavy enough. You can buy a small-hole barbell bar, the aperture is the same as that of a dumbbell bar, and you can match the weight according to the situation.

Big dumbbells like 60kg are all full weight (that is, the weight does not include dumbbell rods and clips), and they are all sold by kilogram. Generally speaking, the cheaper one you can buy is 4.5 yuan per kilogram, and the price of a pair of 60kg dumbbells is in the early stage around 300 yuan (I spent 3 10 yuan when I bought it, including dumbbell rods). Someone upstairs said that the price is around 150 yuan, which is a pair of 30kg and a single15kg. This kind of ordinary dumbbell rod is too short, and it is difficult to add it to 30 kilograms. The 50 cm telescopic pole I bought can only be increased to 50 kg. In the future, when 30 kilograms is not enough, I can buy dumbbells separately to upgrade.

In addition, it is also very useful to use dumbbell bars of ordinary length, which can be matched with large pieces, such as barbells of 7.5 kg or 10 kg, or can be added to 30 kg. But it is not recommended because it is not easy to use.