Perhaps you may receive more replies by posting in the "Attachment" forum here on TBN. In regards to your question, it largely depends on the size of mower you are looking at, plus the PTO rating of your Tractor. Most mowers have the specs in relation to their cutting capacity; included in the manual. If you are looking at a used one, just Google the manufacturer, make and model and you should find the answers. BTW, welcome aboard. :tractor: