>>1950356You can do tricks, trails, jumps, downhill, mtb, and if you get a tall seatpost you can cruise for long distances because if the low gear and fat tires. If you get skinny tires and a higher gear they can go faster than a road bike on the same gear ratio, because after 20mph 90% of what is slowing you down is air drag and 20" wheels don't kick up air anywhere close to what a 700c wheel will do. Also you are closer to the ground than sitting up tall like a sail.
People don't know the versatility of these bikes and their capabilities. Their durability is undeniable and legendary. A decent BMX will be in your family for generations.
There's people that think they're kids bikes because of the 20" wheels, but then will turn around and ride a brompton with 16" or smaller wheels. It's all on the advertising.
It's about frame size.
19" for 4'10" - 5'4"
20" for 5'4" - 5'10"
21" for 5'10" to 6'4"
Lastly the wheels don't brake