The Shimano CS-HG400 Alivio 9-Speed Cassette uses Hyperglide sprockets that have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load.Close ratio gearing allows a more efficient use of energy through finer cadence controlGear ratios to suit all wheel sizes 700C/26/27.5/29inchSprockets are cut away and drilled to reduce weight without reducing rigidityNickel-plated finish offers hard wearing resistance to corrosionCorrosion-resistant steel cassette lock ringFor Super Narrow 9-speed HG chains
The Shimano Alivio M3100 Rear Derailleur offers crisp performance on and off road for 9-speed drive trains as well as being great value for money. The shadow design with smooth skid plate surface features a super low-profile design that reduces the risk of damage from trail side hazards.Wide link design increases rigidity and service lifeAlloy body and outer link leads to lower weight without compromising strength and durability11-tooth pulleys for reduced pulley wear and chain noiseAdvanced light action design with low friction fluorine coated link pivot bushingsFor use with 32 to 36 tooth low rear sprockets, total capacity 45 teethTop-normal swing designCompatible with 9-speed Hyperglide sprockets