Dr. Tray SpeedKnob Spring Assembly Instructions Thomas Rastall Updated March 30, 2018 13:02 Follow If you have additional questions you can contact us here, or by phone at 888-925-4621 M-F from 7 to 4 PT Related articles The Remote Release Lever of my Dr. Tray is tight, can this be loosened? How can I tell if my Speedknob is locked or unlocked? How can I find Replacement Parts? What is the capacity of the Dr Tray? Will the Hold-Up or Dr.Tray work if my Bike has Fenders? Comments 0 comments Please sign in to leave a comment.