For riders who want worry-free shifting, Estes delivers. With robust, wide-set pivots, a more rigid body and cage, and high-quality metric adjustment hardware, Estes rear derailleurs perform well above expectations.
Features
Compatible with 6/7/8/9 speed cassettes and shifters
Metric adjustment hardware for easy setup and maintenance
Construction includes metal inserts for a stiff and responsive linkage
Compatible with Shimano cable pull
Short (1x) or long cage (2/3x) versions
Short cage provides ample ground clearance, even for 20″ wheels
Long cage compatible with 2x or 3x chainring and 28t-32t max cassette sprocket
Specifications
Cage LengthLong or Super Short cage versions
Speed9-Speed, 8-Speed, 7-Speed
Max Sprocket28-32T 
Capacity43T (long), 21T (super short)
ClutchNo
Cage MaterialSteel
Outer Link MaterialComposite
CompatibilityShimano Mountain