Park Tool FAG-2 frame control gauge

Many bicycles do not shift or run properly because the front and rear wheels do not align with the frame. If these conditions persist after adjusting the wheel and derailleur, the seat and chain stays, as well as the rear dropouts of the frame, may be misaligned. For years, the accepted method for checking the alignment of the rear dropout 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 can be quickly and accurately checked at the dropout. Retractable pointer for all bicycle sizes and types.