Bones Hardcore Bushings get their name from the chemically-bonded inner core, which distributes force evenly over the bushing, instead of just on one side at a time. This gives longer bushing life, more responsive turning, and increased smoothness.
If in doubt about which to get, just go with the same hardness and shape you're used to. But, if you want to experiment, remember that softer cushions are for looser trucks and/or lighter riders, while harder cushions are for tighter trucks and/or heavier riders. Also, conical cushions tend to turn faster and feel more responsive, while cylinder cushions are more stable.
- 91A durometer
- Double conical