The Shred Sled is like all the other caster boards out there (ripstik, wave board, s-board, the list goes on) but it adds a little something extra to the mix by throwing in two more wheels.
Other caster boards like the ripstik only have two wheels, the shred sled has four. This is said to give the rider more control, make it easier to ride, and smoother as well.
The Shred Sled Specs
- It brings the thrills and carving movements of snowboarding to the streets.
- It has a cool feel--combination of snowboarding and skateboarding.
- Can quickly go uphill. It's easy
to propel the SHRED SLED. You don't even have to push off! - 4 INLINE wheels have much more control than 2 wheels.
- The 4-80mm polyurethane wheels and ABEC-5 Bearings are SMOOTHER and STRONGER and rarely need to be replaced. (unlike other boards)
- The concave decks make for better foot control.
Video of the Shred Sled in Action
Link: The Shred Sled
US $71.98
The Pumgo skateboard is a kick-less skateboard where the rider pumps the board back and forth to propel themselves forward.
The Trikke is a pretty sweet cross between a scooter and skates. 
The Speedgo is a gas skateboard that looks like it was made with carving in mind.
