Park Tool FAG-2 Frame inspection gauge

Many bikes do not shift or run properly because the front and rear wheels do not match the frame. If these conditions persist after adjusting the wheel and front derailleur, the seat and chainstays and rear dropouts of the frame may be misaligned. For years, the accepted method of checking the alignment of the rear dropouts was to run a string on both sides. This method works to a certain extent. However, it is not accurate because the measurement is not taken at the dropout. With the Park Tool Frame Alignment Gauge, the alignment at the dropout can be checked quickly and accurately. Retractable pointer for all bike sizes and types.