Bones Wheels81A Hardcore Soft Bushingy incl. Washer

The ones with the hard core and the soft shell 

The Hardcore 81A Soft Bushings offer extended durability and allow for maximum steering ability.

The HardCore bushings from Bones have one advantage compared to other steering rubbers: a hard core.
And that is exactly what turns the bushings into a revolutionary product. Normal bushings work on the single action principle. However, the hard core in the Bones HardCore prevents the steering rubber from pushing too much towards the opposite direction. The result is an increase in the resistance of the bushings and their rebound, allowing for tighter, faster turns.