Hitachi EX27U and ZX27U rubber tracks and parts are closely interchangeable. Rubbertrax stocks replacement rubber tracks and undercarriage parts for the Hitachi compact mini excavators designed for the North American construction market. This category is for the Hitachi EX27U and ZX27U series models. The sub-series -2 through -5 require different track sizes and undercarriage parts so please verify your series. Track sizes may vary per sub-model so please verify before ordering.