Bmx bikes come in a bunch of different sizes ranging from 12 all the way to 26.
Bmx bike sizes.
As a minimum you will need at least a 23 inside leg to be able to stand over a full size bmx bike.
Height ft in cm top tube in crank size mm 4 122.
Over the years this frame has been made in a variety of sizes ranging from 19 8 21 75inches with variations to the chainstays head tube angles and seat tube angles the 20inch bmx frame has been through a lot however one thing has remained the same the riders.
Most bmx bikes have 20 tires while the larger frames may use 24 tires also known as cruiser class bmx bikes.
Including 20 25 20 5 20 75 and 21.
Racing bmx bikes are lightweight designed for speed and stability while freestyle bmx bikes are sturdier with thicker frames and tires designed for maneuverability while doing jumps and tricks.
When figuring out frame size only the rider s height is important.