These are bushings to make your longboard truck come to life. Fit on most reverse kingpin truck. Will they fit on a convention skateboard truck? Depends on the length of the kingpin, you'll need 2 inches. Best to use the street truck version
The idea is these bushings have more spring but also dampening. Cars have springs AND shocks for a reason. You dont want all rebound because there is no control which mean no stability. So Venom has built dampening into the formula so when you tighten the kingpin nut, the bushing does not squish. What happens is it pre engages the bushing, this means it feels like you are already turning the truck and the bushing is engaged. Result is no slop or play in the truck. You can feel the whole turn, the truck will pop back to centre quickly. Set you trucks up right and you feel that bounce out of the corner or snap to centre from the corner apex to exit at maximum speed!