Steel bearing provides smooth paddling performance. 58% lighter and 120% harder than standard materials, ensuring reduced friction and quieter chain rotation. Oversized pulley design with 14-tooth and 16-tooth configurations featuring wide and narrow tooth profiles for precise chain engagement, improved performance, and minimized friction. Compatible with GX AXS Eagle 12-speed systems, offering low drag operation. Designed for durability, TRiPEAK steel bearing pulleys maintain consistent performance over extended use. Waterproof, dustproof, and resistant to deformation. Sealed bearings help keep out contaminants and maintain reliable operation in off-road conditions. Material: Plastic and metal. Color: Black. Package includes: 2 x guide wheels with positive and negative teeth (14T + 16T), 4 x washers, 1 x wrench. Note: Colors may vary slightly due to lighting and display differences. Measurement tolerance: +/- 1-3 cm.