The PB-7 Repair Stand & Truing Stand quickly mount to the PB-1 Portable Workbench to create a complete workstation! The repair stand securely clamps the front fork dropouts & bottom bracket for quick repairs & adjustments on most road & mountain bikes The truing stand attachment allows truing of wheels up to 29 inches Wheel dishing &40;centering&41; is performed by simply flipping wheel in stand