Quickshifter+ uses two sensors, where one sensor on the shift arm detects the movement on the shift lever rod when the rider upshifts and the… Quickshifter +2018-12-132018-12-13https://spinnin-wheel.com/wp-content/uploads/2019/08/logo_spinnin3.jpgSpinnin-Wheel AShttps://spinnin-wheel.com/wp-content/uploads/2018/12/pho_bike_det4545.jpg200px200px