Hitachi ZX35U-2 and ZX35U-3 rubber tracks and parts are closely interchangeable. Rubbertrax stocks replacement rubber tracks and some undercarriage parts for the Hitachi compact mini excavators designed for the North American construction market. This category is for the Hitachi ZX35U-2 series models. The sub-series -2 through -5 require different track sizes and undercarriage parts compared to the basic ZX35U model so please verify your series. Track sizes may vary per sub-model so please verify before ordering.