Originally Posted by newz7151
I can't quite find the specs to back this up or help on it, but most 21" mowers have the blade connected directly to the crankshaft which means the blade RPM is directly dependant on the engine RPM which most range from 2900-3300RPM. With the 30" TimeMaster being a two blade belt driven deck, the RPM of the blades themselves could be much faster depending on the drive pulley setup of the deck, thereby providing a much different result in the cut in taller grass.
Very interesting. I never thought of that, and the salesman didn't mention that either.