Kubota U55-4 and U45-3 mini excavator undercarriage parts are now available with online shopping. Aftermarket replacement construction equipment parts such as sprockets, rollers, idlers and rubber tracks specifically designed to fit the Kubota U 55-4, Kubota U45-3, and KX 057-4 mini excavators. Use your mouse on the image below to help identify the parts you are loping for on your Kubota U 55-4. The image is labelled the KX 161-3 but it is the same interchangeable undercarriage for reference. Call us if you have any questions.