The Surf Adapter fits to any skateboard and mounts to front truck.Experience 3x tighter turns, smooth fast pumping, improved flow, increased deck articulation and grip around curves.Enhances truck performance for a skateboard, longboard, or drop-through board.Transforms a regular or reverse kingpin truck into a surfskate truck - great surf trainer How does this system compare to caver c7 and the swelltech surf skate? the jamie o'brien pro model in particular.Answer:The Surf Adapter lets you turn much deeper that a Carver C7 and perform surf manuvers that are much more true to surfing that a Carver CX truck. Swelltech surf skate with its Jamie O'Brien pro model boasts the V-truck which can spin 360 degrees, but this makes them extremely unstable at medium or high speed and nearly impossible to use as a practical mode of transportation. The Surf Adapter has a unique geometry that allows you to hill bomb with confidence and stability. Most importantly, the reason why the Surf Adapter is so special is because it enhances everything that made you love your skateboard in the first place. The skateboard deck, trucks and wheels that you picked out will still feel familiar with the Surf Adapter, and you will still recognize the characteristics that make your skateboard unique.Colour:blackMaterial:Aluminum alloyPackage Contents:1 x Front Truck-Surf Adapter1Pair x 6.25inch skateboard bracket4 x 25mm screw + nut4 x 23mm screw + nut4 x 53mm screw + nut1 x 6mm skateboard gasket2 x 10mm skateboard gasketNote: Damping pads, washers: random colors, don't accept the specified colorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.