The Kubota RD45121302 Idler Wheel Assembly is a genuine OEM replacement part designed for various Kubota KX and U series compact excavators. This critical component guides the track and maintains proper tension, essential for the machine's stability and performance. Weighing approximately 9.07 kg, it is built to Kubota's specifications for durability and precise fitment, ensuring reliable operation in demanding conditions. Compatible with models including KX040-4, KX121-3, KX161-3, U35, U45, and U55.