The Kubota RD40121700 is a genuine OEM track roller, an essential component for the undercarriage system of various Kubota excavators. This robust roller is designed to provide reliable support and guide the track, ensuring smooth movement and proper weight distribution. It is compatible with a range of Kubota models, including the KX040-4, KX057-4, U45, U45S, U45ST, U55, U55-4, U55-4 (S2), U55-4 (S3), U55-4 (S4), and U55-4 (S5). With a weight of approximately 4.536 kg and dimensions of 152.4 mm in length and width, and 127 mm in height, this track roller is built to meet Kubota's stringent quality standards for durability and performance.