Size: Arm length 170mm/6.69inch 4-hole BCD 104mm Material: Made of aluminum alloy material, lightweight and durable. High quality: Fine workmanship ensures chain retention, reduces friction and noise. Applicability: Suitable for mountain bikes, road bikes, etc. Easy to install: Hollow type, comes with special tools, easy to wear. We cannot change an address after the order has already been placed.
We provide valid Tracking Numbers for all orders. If you have any questions or issues, we are at your service. We will reply to your question or invoice within 3 days. We can't not reply gifts or unreasonable requests such as declared amount.