What is the reduction ratio of the mulch produced by my Shredder Joe SDJ616? Your Shredder Joe SDJ616 has a reduction ration of 16:1, using heavy-duty 2.5mm trimmer line to mulch leaves down to 1/16th of their original size. Related articles Does my Shredder Joe SDJ616 have an adjustable stand? How do I use my Shredder Joe SDJ616 to bag up my freshly-made mulch? What kind of maintenance does my Shredder Joe SDJ616 require? What is the mulching capacity of my Shredder Joe SDJ616? What sets the TV Offer apart from the standard Power Joe generator?