Ryan Lawnaire IV Plus and V Plus are both self-propelled, core-type aerators
Design changes include handle-mounted throttle and side-mounted grips on both models
Lawnair IV features a folding handle that lowers the height for transportation and storage
Both models feature new design of drive train that uses a single, heavy-duty nickel-plated drive chain
Both feature solid-steel axle with construction-grade ball bearings
Both models are designed with a dual-weight system that increases ground pressure by 25 percent
With the added weight of filled water drum, coring tines penetrate soil down to 2.75 inches
With a 19-inch aeration width, the Ryan Lawnaire IV Plus can cover up to 28,000 square feet or two-thirds of an acre per hour
Designed for bigger jobs and stability on slopes, Lawnaire V Plus has 26.5 aeration path, allowing it to aerate more than 40,000 square feet or nine-tenths of an acre per hour
