
Light but durable design, for those looking for lightness and resistance.The top pulley has a conventional 12-tooth profile for smooth shifting while the bottom 14-tooth pulley has a wide/narrow profile to ensure the chain fits perfectly.The 2 rollers are made of aluminum and have sealed bearings.Technical specifications:CNC machined from 2014T6 aluminum.12 teeth upper pulley / 14 teeth lower pulley.Available in black, silver, red, blue, purple and orange.Weight:34g per pair.Also compatible with Sram AXS 12-speed derailleurs.