Steel bearings provide smooth paddling performance. 58% lighter and 120% harder than standard materials, the pulley system ensures creamy chain rotation with reduced friction and noise. Oversized 14 and 16-tooth pulley design with wide and narrow tooth profiles for precise chain engagement, improved performance, and significantly lower friction. Compatible with GX AXS Eagle 12-speed systems, offering minimal drag. Built for durability, TRiPEAK steel bearing pulleys are engineered to maintain consistent performance over extended use. Designed for off-road conditions: waterproof, dustproof, and resistant to deformation. Features sealed bearings to keep out debris and maintain smooth operation. Material: Plastic and metal Color: Black Package Contents: 2 x Guide wheels with positive and negative teeth (14T + 16T) 4 x Washers 1 x Wrench Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual product. Measurement error allowance: +/- 1-3 cm.