The KIOALXZ Motocross Chain Drive Sprocket Modification Parts are a must-have for avid dirt bike and ATV riders. These innovative parts offer a durable steel construction that can withstand the rigors of everyday use, making them ideal for rough terrains. The inner diameter of this rear sprocket measures approximately 5.4 cm/2.13 inches, ensuring a perfect fit for most dirt bikes and ATVs. The 80t and 25h specifications cater to riders of varying skill levels, providing optimal performance and longevity for their rides. This rear sprocket is specifically designed for motocross use, ensuring unparalleled efficiency and control on the track. With its high-quality materials and meticulous engineering, the KIOALXZ Motocross Chain Drive Sprocket Modification Parts are a true game-changer for riders seeking a reliable and high-performance upgrade.