Available in 5 types: choose from five different chainring options to match your bike and riding style. Each type is prepared to meet different needs for or upgrade on mountain bikes. Direct replacement: precisionmade to old or broken chainrings. Designed with four mounting holes arranged in a square pattern with 96 mm centertocenter spacing for straightforward fit on compatible cranks. Improved chain retention: positiveandnegative tooth profile (alternating tooth shape) helps keep the chain engaged and reduces the chance of chain drops during offroad riding. Durable anodized finish: anodic treatment creates a protective oxide layer on the aluminum surface, improving corrosion and rust resistance and preventing color fade during longterm use. quality material and machining: made from aluminum alloy with fine CNCstyle machining for strength, wear resistance, and low weight. Built to withstand trail use while keeping rotating weight minimal. Easy installation and long service life: manufactured to industry tolerances for a reliable fit and stable performance over extended use. Key specifications and attributes: Mounting: 4 holes in a square pattern Mounting spacing: 96 mm centertocenter (square) Material: aluminum alloy with anodized surface Tooth profile: positive and negative (alternating) teeth Benefits: anticorrosion, wear resistant, lightweight, hard to drop chain Suggested use scenarios: 1. a worn or damaged chainring on your mountain bike after a crash or longterm wear to restore shifting and pedaling efficiency. 2. Upgrade to a chainring with alternating tooth profile when converting to a singlering setup or when you want better chain retention on rough trails. 3. Keep one or more spare chainrings in a bike or trail kit for quick replacements during guided rides or multiday trips. Notes: Confirm compatibility with your crank by checking the 4bolt square 96 mm spacing before . Proper installation and torque of mounting bolts are important for safety and performance.