The height of the bars refers to the height from the top to the bottom of your handlebars. Unlike other bikes, BMX bikes run their handlebars substantially higher due to the nature of the sport. Handlebar height not only affects the way you ride but can have an affect on the way you feel riding your bike. If your bars are too low, you will be likely to develop some lower back pain. Handlebar height is largely personal preference but keep in mind that the bars must “fit” you, so if you have any questions make sure you get in contact with us at help@luxbmx.com