Bike Variable Speed Line Group Benefits and purpose - Improves shifting precision for reliable gear changes - Reduces friction with a greased PTFE inner tube for smoother operation - Durable construction with a high carbon steel cable tube to resist deformation and maintain performance Materials and construction - Greased PTFE inner tube for low friction and smooth movement - High carbon steel cable tube designed to resist deformation and preserve accurate speed shifts Included components - Outer housing end caps - Inner cable tips - S buckles - and other related components Performance and compatibility - Built to support consistent, smooth gear shifting and long service life - Includes essential parts needed for installation and setup Use scenarios - Road bike maintenance or upgrade: replace worn components to restore precise shifting on city and road rides - Mountain bike upkeep: improve reliability and response during off-road or mixed-terrain riding - Routine bike maintenance: a ready-to-use kit for periodic shifts refinement and system refresh Note - Contents may include additional related components beyond those listed above as part of the kit.