Derailleur "Altus" 7- and 8-speed. 7/8-speed MegaRange MTB rear derailleur. Wide link design for more rigidity and precise shifting. Original Shimano parts guarantees that all components work perfectly for optimum performance and maximum safety and longevity. Shimano is in the business of producing bicycle components and sport fishing equipment, both recreational tools whose value is determined by how well they perform in the hands of the people who use them. Their business philosophy is based on developing products that help people to interact with nature through the outdoor activities they love.