I have a set of the "Zoomo" on my street bike and my son has a set of a discontinued model called "Camo" on his BMX bike. A nice skinwall tire, but please understand the Sweetzkinz tread patterns I am familiar with are intended for street usage. They offer off road treads, but I can not speak as to how effective the off road tread patterns are.
'If Wal-Mart sold parachutes, who would jump?' Frank Havnoonian (quoting his father) Drexel Hill Cyclery