Feature:1. Adapt to the size, the maximum flywheel is 36T and the minimum is 11T. The maximum tooth difference of the crankset is 22T, and the tooth capacity is 45T. 2. Made of high-quality materials, durable and practical, long service time. 3. Apply lubricant to the threads of the rear deflector suspension bolts. 4. Use 3mm hex wrench to adjust the Joint B adjusting bolts, the rear derailleur suspension tab is not obstructed. 5. Use 5mm hex wrench to install the rear derailleur on the rear derailleur suspension of the bike frame. Rear derailleur suspension bolts torques is 8-10N.M. Specification:Condition: 100% brand newItem type: Bicycle Rear DerailleurModel: RD-M400Material: aluminium alloyColor: blackWeight: Approx. 305g Speed grade: 10 speed Adapt to the size: the maximum flywheel is 36T and the minimum is 11T. The maximum tooth difference of the crankset is 22T, and the tooth capacity is 45T. Package List:1 x Derailleur