✅ Complete assembled big pinion gear for BBS01/BBS02/BBSHD Bafang mid motor
✅ High-strength material, wear-resistant for long-time ebike riding
✅ Same dimension as factory original gear for seamless installation
✅ Ideal replacement for broken, stripped or worn stock pinion gear
✅ Effectively solve gear skipping, abnormal rattling & motor noise issues












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