Size: Competition kettlebells have a uniform size whatever the weight. This makes it easy and convenient for the athlete as they are used to a certain size for everyday training. On the other hand, cast iron kettlebells vary in size – as the weight increases, the size increases. With such dimensional changes, the athletes lifting groove is disturbed as the shape changes.
Handle: Competition kettlebells have thin handles. This is because the athletes tend to perform faster and quicker sets at a high speed. This quick motion can make the arms and forearms go sore and tired quickly while holding onto the kettlebell tightly. Hence, thinner handles are a convenient choice for a long and comfortable grip. On the contrary, the size and dimension of cast iron kettlebells change with the weight, changing the handle’s proportions as well. The more the weight, the thicker the handle diameter.
Durability: Competition kettlebells is made of steel that is one cast, which makes them highly durable and indestructible. Cast iron kettlebells are strong and durable only when coated with vinyl or plastic.