These arent as hard you think. I bought sum from my local skateshop because my old ones were way worn out. I got these in hope of being able to actually get my balance and land consistently unlike with my old bushings. After putting these on I could help but notice they were worse than my old ones. I catch major wheel-bite with these. They were desent like the first 5 hours of me using them then they kinda just gave up. These honestly aren't that hot to me, in my opinion. Maybe I had tainted bushings? Might be a different outcome for someone else. As long as there are refunds I'm not sayin dont try em.