Kink 2021 Coast 12" Balance BMX Bike. The Coast is all about inspiring kids to start riding from an early age. Balance bikes, like the Coast, help to teach kids balance and coordination instead of relying on training wheels. What’s special about the Coast, is the way it combines features and geometry for children, with that of a BMX bike. The Coast is truly a balance bike designed for working a child’s way up to their first BMX bike.