Shimano Acera M3020 Sgs Rear

Double Servo rear derailleur with smooth, precise shifting performance and wide-range capability.The SHIMANO ACERA M3020-8 rear derailleur with Double Servo technology helps you ride challenging terrain with fewer interruptions.Features:- Double Servo construction for smooth and precise shifting- Versatile performance and wide compatibility- Max. low sprocket: 40T- Total capacity: 45TProduct Specifications:- SERIES: ACERA M3000 Series- Compatible chain: HG 8/7/6-speed- Total capacity: 45T- Cable adjuster: Yes- Mount_Direct attachment (Conventional): Yes- Fluoric coated link bushings: 1- Low sprocket_Max: 40T- Low sprocket_Min: 30T- Max. front difference: 20T- Pulley_Sunken type pulley bolt: Yes- Pulley_Teeth: 11T- Pulley cage: SGS- Top-Normal spring type_Double servo: Yes- Top sprocket_Max: 12T- Top sprocket_Min: 11T- Rear speeds: 8/7Technologies:Double Servo:- SHIMANO's double servo-panta mechanism enables the rear derailleur to move in an optimum path. The guide pulley tracks the cogs closely while moving front to back, optimizing each shift. Perfect tracking contributes to the most accurate SIS shifting. Keeps rear derailleur guide pulley an optimum distance from each sprocket.HG CHAIN DESIGN for HYPERGLIDE+:- HYPERGLIDE+ dedicated chain delivers greater chain retention, improved shifting efficiency, and smoother transmission over rough terrain.Benefits & Features:- Improved chain retention encourages more aggressive all-terrain riding and relieves chain-issue anxiety. Smoother drivetrain transmission and enhanced shifting performance sharpens riders' concentration and improves acceleration. Better chain engagement cuts abrasion, reduces maintenance, and lengthens the lifespan of the chain.HYPERGLIDE+- Revamped HG chain features an extended inner link plate that connects seamlessly with new chainring tooth shape for ultra-efficient drivetrain performance.- This design change reduces the vibrations normally caused by the inner and outer chain plates rolling onto the chainring, and provides better chain engagement, stronger retention, and smoother pedaling.