The multi-strand steel design resists stretching over time, providing reliable and accurate gear changes ride after ride The included 4mm outer housing features advanced engineering with a low-friction polymer liner that reduces sliding resistance This compressionless design means lighter and quicker lever operation, giving you more responsive shifting when you need it most The Universal Bicycle Gear Cables work seamlessly with standard shifting systems from major brands including Shimano and SRAM Some sets include rubber “donuts” or rings that slide over exposed inner cables, preventing them from scratching your bike frame This thoughtful addition protects your bike’s finish while keeping your cable routing clean and organized