The TrimStar deck is 4" deep and available in 36", 48" and 54" width cuts. It is the same deck that is used on our Fastrak and Super Duty Fastrak Zero Turn units. The ride-on units are able to cut at a much faster ground speed than the walkbehind purely by drive design. They just go faster. If the deck is able to keep up with the rider you'll find no issues with it when used on a walkbehind. very easy and quick height adjustment, and the steering is very easy on the hands.