Improved chain retention with narrowwide teeth The narrowwide teeth design enhances chain retention, helping to keep the chain engaged on the cassette cog. This design also extends the wear life of the cassette cog and reduces friction and noise during rides. Lightweight steel construction for performance Made from quality steel, this MTB/road bike cassette cog offers durability without unnecessary weight. The construction supports reliable performance, keeping your bike responsive during rides. Maximum ring durability for tough riding Designed with larger wide teeth, this freewheel provides strong durability and improved drop performance. You can rely on its strength and stability during intense rides or challenging terrain. Easy installation and removal Installation and removal are straightforward, allowing quick setup or maintenance on your bike. The design supports efficient service and hassle gear changes. Use scenarios Mountain bike trails requiring secure chain retention during aggressive climbing and downhills. Endurance rides on mixedterrain routes where dependable shifting and durability matter. Regular road or gravel commuting that benefits from a robust, lowfriction drivetrain without added weight.