HP Velotechnik Stand Up Aid For Trikes With Front Suspension Type:Left The BBT-9 fits cups and

The BBT-9 fits cups and lockrings with 16 external notches and an outside diameter of approximately 44mm

Velocity Hub

The retaining plates get bolted to the holes on the back of the seat frame under the mesh fabric

The optical gear display provides a clear indication of what gear you are in while riding

down to about 3" (75mm)

HP Velotechnik Stand Up Aid For Trikes With Front Suspension Type:Left The BBT-9 fits cups andHP Velotechnik Stand Up Aids for Scorpion trikes with front suspension provide a stable grip for easy entry and exit from the trike. Secures to the frame cross bar member. Watch the HP Velotechnik YouTube video for installation instructions.