Founded in Scotland by Grant Smith in 1998 with a 44T sprocket, BSD has grown to be one of the most respected brands in all of BMX. Today, BSD offer the full range of premium BMX parts to build your custom bike. To sum up what BSD is now, we are an award-winning, rider owned BMX brand, designed by riders for riders. We pride ourselves on making design led, innovative BMX frames and parts built for abuse. They have and amazing team of riders who represent what BSD is all about.