SHIMANO DEORE - 10-Speed - Super Narrow - HG-X - MTB Chain Perfect for 10-speed mountain bikes, the HG-54 is a directional Super Narrow HG-X chain with a mud-shedding design. FEATURES- Mud shedding design- Directional chain- Further evolution of shifting performance PRODUCT SPECIFICATIONS- MODEL NO CN-HG54- SERIES DEORE T6000 Series- Average weight 273- Chromizing treatment roller link pin - Type HG-X 10-speed- Pin link plate Gray- Roller link plate Brown