When I purchased my BX-25 about 7 years ago I bought the "pads" for concrete and black top from Kubota. Put them on and they sank too much in the mud. Modified the original pad for more surface area and have never put the pads back on. But I have not needed to be on the black top to dig either. Not really answering your question, just giving some feedback. With that said, anyone interested in buying a set of pads?