All BMXs are single speed and therefore cranksets play a crucial part in balancing rider weight, to control the bike’s speed and agility.
You would ideally want a three-piece crankset, which has separate crank arms, spindle and bearing races. The result is that individual components that comprise a three-piece crankset are individually stronger, forged from better materials.
A single-piece crankset is cheap for a reason, as it often compromises in terms of metal quality and the bearings that spin it.