Avian Versus Youth Carbon BMX Race Fork-20"-1"-Matte White size-214mm The Ultra SS Series is

The Ultra SS Series is also built to work with all standard axles 10mm (3/8") - 20mm thru-bolt and fits Onyx's Ultra SS Cogs

and 700c wheels (knobby tires are not recommended)

the crossbar is 16mm and they're available in 6 sizes in black and chrome

The Fly Racing Werx-R L

Avian Versus Youth Carbon BMX Race Fork-20"-1"-Matte White size-214mm The Ultra SS Series isThe Avian Versus Youth Carbon BMX Fork 20in x 1in Matte White combines lightweight carbon tech with advanced engineering for maximum performance. The Avian Versus features an internal locking system which allows for quick and easy installation and maintenance without the need for special tools. We do recommend the use of a torque wrench for installation to be sure your bolts are not over tightened and the suggested rider weight limit for this fork is