Cheap And Discounts 17T Bicycle Carbon Ceramic Bearing Pulley Jockey Wheel Set Rear Derailleurs Guide For Shimano R8000 8050 8070 9100 9150 9170 Wholesale. Buy Directly From Merchant Shop5276005 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.