1. Hydraulic riveting technology 2. Wear resistance 3. Accurate and flexible shifting performance 4. Special design of mid-drive engine 5. Improve the smoothness of shifting 6. Improve shifting performance 7. Alloy material, strong and wear-resistant 8. A variety of specifications, you can choose according to your needs 9. Material: steel 10. Compatible: suitable for BOSCH and other types of 8/9/1011/12 speed sports electric bicycle systems 11. Model: 8/9/10/11/12 speed 12. Link: 136 sections 13. Tensile load: 1000KN 14. Weight: about 330-380 grams
