In 1987, SunTour introduced its new attempt at an indexed shifting system, "AccuShift". "AccuShift" came late to the market to compete with Shimano's new SIS system introduced two years before, which cost SunTour dearly. With two years of lead time, Shimano could afford to require that bicycle manufacturers equip their bikes with complete SIS shifting systems, minimizing problems with product compatibility. SunTour, on the other hand, desperately needed orders, so the company could not insist on complete SunTour component groups that had been tested to ensure compatibility with "AccuShift". As a consequence, major bicycle manufacturers such as Schwinn and Raleigh installed "Accu-Shift" on low-end bikes using inventories of older freewheels, hubs, cables, cable housings, and chains from other manufacturers. The practice resulted in a mismatched 'system' that did not provide the critical tolerances needed for reliable indexed shifting.