I run the Velke x2 and IMO the tires provide some cushion but can't imagine being better than a stander. Rough terrain can be bumpy. I did see a velke/sulky with suspension somewhere on the site. Looked nice. Not sure of rebuild capabilities or longevity. Also didn't research whether or not it chains up or disconnects easily like the x2. Very hilly terrain or extremely small yard I chain it up or disconnect it. Takes about 10 seconds.
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