INDEPENDENT-SUSPENSION MOWERS Ferris Industries has introduced a new line of Ferris mid-mount mowers, ranging from 48 to 72 inches. The new line consists of the 1000 Z (48 or 52 inches), the IS 3000 Z (61 inches) and the IS 4000 Z (61 or 72 inches). The mowers offer two suspension options: two-wheel independent suspension on the IS 3000 Z and four-wheel independent suspension on the IS 4000 Z. The front suspension system on the IS 4000 Z, combined with an independent suspension on the rear wheels, helps to eliminate the shock to the chassis and operator. Ferris Industries