Item Type: TY300 Bike Derailleur Product Material: Iron Gross Weight: 315g or 11.1oz Product Size: 18x13cm or 7.1x5.1in Compatible Chain: For HG UG 7 6 speed Total Capacity: 43D Lower Sprocket Maximum Value: 34 days Lower Sprocket Minimum Value: 28 days Maximum: Front deviation 20d Pulley Teeth: 13 13d Pulley Box: SGS Rear Speed: 7 and 61Models: TY300 rear derailleur, compatible with 6, 7 and 8 speed variable speed transmission systems. Suitable for road bike, mountain bike, etc. 2Sensitive Shifting: With its unique design, the sprocket combines the specially positioned tooth outline and shift ramp to improve the chain control during shifting. The result is fast and sensitive index changes. 3Stable Control: The guide pulley controls the trajectory of the teeth from front to back, so as to optimize each change. This perfect monitoring helps to achieve the most accurate SIS changes. Keep the guide wheel of the rear diverter at a constant distance from each pinion. 4Durable Iron: Made with high hardness iron, this bike rear derailleur is durable and has high toughness, the practical replacement parts for bike transmission system. 5Indexing System Elements: The indexing mechanism built into the shift handle, the friction free SIS rear indexing shift cable and the soft drive rear indexing shift, constitute the index system. 1 x TY300RearDerailleur Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.