Park tool fag 2 frame alignment gauge

many bicycles will not shift or track properly because the front and rear wheels are not in line with the frame if these conditions still exist after wheel and derailleur adjustments the seat stays chain stays and rear drop outs of the frame may be misaligned for years the accepted method to check the alignment of the rear drop out was to run a string on either side this method does work to some extent however it is not accurate because the measurement is not taken at the drop out with the park tool frame alignment gauge the alignment can be checked quickly and accurately at the drop out retractable pointer to fit all sizes and types of bicycles ...