1. Length: 1.2, 1.5, 1.8, 2.2 (I haven't seen longer ones)

2. Handshake diameter: 25mm 28mm 30mm 32mm 50mm (50 is only seen on Taobao, it is a special powerlifting pole) Olympic weightlifting pole is 28mm, but currently more of 30mm or 32mm in China, the purpose is to increase safety Load-bearing, 25mm is obviously a low-end shrink rod.

3. Form: straight rod, serpentine curved rod, super curved rod, circular deadlift special rod, raised squat special rod, short circular arm training rod.

4, the diameter of the hanging piece: 25mm 50mm. 50mm is better, 25mm is for small hole barbells, and 50mm is for olympics, which is a large one.

5. Self-weight: The lowest 5kg is below, and then there are 5.6kg, 8kg, 10kg, 13kg, 15kg, 18kg, 20kg and other weights. The regular 220cm rod should be 20kg, which is the international standard, but the domestic 220cm rod is not like that. Many of them are shrunk. The density of steel and the volume of the barbell rod are calculated with mathematical and physical knowledge. The result is 19.76kg, plus the convexity. It should be exactly 20kg, the reason why many 220 barbells are less than 20kg, because the sleeve is hollow.

6. ​​Safe load-bearing: the lowest is about 50kg and the highest is 1200 pounds. They are regular rods. Of course, the Hercules squat has more than 1200 pounds. Those are special rods that you can’t reach. The safe weight-bearing capacity of some products in the gym should be more than 350kg.

7. Craftsmanship: This is very important. Most barbell bars do not have any craftsmanship.

Shaft process: electroplating, multi-layer electroplating, boiled black, rusty

Sleeve technology: bearing, copper sleeve, solid, hollow, one-piece, non-one-piece.