Shimano's 9-Speed Alivio, Acera and Altus MTB ... - SHIMANO BIKE …
https://bike.shimano.com/en-US/information/news/shimano-s-9-speed-alivio--acera-and-altus-mtb-groupsets-adopt-ra.html
WebMar 1, 2018 · ALIVIO, ACERA and ALTUS, Shimano’s entry level off road components, have now been upgraded with the essential features for real MTB riding. The groups adopt race-inspired designs and more user-friendly features to help inspire the next generation of riders to discover the exciting world of mountain biking.
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