Dec 03, · Built with a new reduced radius design, the 304 features a narrow, 1700-mm (66.9-in) track width, 254 mm (10 in) slimmer than the 304 E2, for more temporarytility and access to nfined spaces. While narrower, the new 304 design increases performance, balance and stability of the 4-tonne class model. Its reduced radius allows for greater stability