Powerwise, The Exmark 30 acts like a similarly powered 21"
A 15" blade cuts a path roughly 180sq in, 2 15" blades cuts roughly 360sq in.
A 21" blade covers about 350 sq in. The outer diameter of a circle adds up fast.
While the Exmark's blades total width is greater than a 21", their outward reach is greatly reduced.
If a 21 will bog, the 30 will bog, if a 21 will take it full speed, so will the 30. They put a lot of thought into the size of these mowers
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