Mountain bike (7/8/9/10 speed) rear derailleur about 254g. Mountain bike 10-speed rear derailleur about 253g. Mountain bike 11-speed rear derailleur about 255g. MTB shift lever. Fine-tuning knob: By fine-tuning this knob, you can change the length of the wire tube, adjust the position of the cassette and the chain, and effectively solve problems such as jumping teeth, unsmooth shifting, and abnormal noise of the chain.
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