The 1998 Powerlite Expert Frame. This is the frame for riders who are too big for the Jr. but not quite ready for the Pro frame. The Expert accepts 1⅛ inch forks for when younger riders start jumping and need a stronger front end. Donny Robinson rides an Expert, and this frame never went so fast. This frame has a side pull brake mount, to accommodate either a 20 x 1⅛ inch or 20 x 1.75 inch wheel. The Expert is also available as a complete bike.