Skateboard bushings are critical to your trucks and the style in which you skate. Harder bushings means a tighter truck , a higher pop on your board , However , less ability to turn the board efficiently. Soft bushings means more control over your board and less wheel , mainly for people who love to ride loose trucks.  If you require any assistance email humanityskatestore@gmail.com and a member of staff will be happy to assist you! Alternatively you can find more information in "Skateboarding guide / Q&A"