These wheels are a complete curve ball from Proto when it comes to wheel selection...and we like it! The crazy bright neon color ways are formulated for high-impact and responsiveness just like every other Slider wheel. The wheels feature BUFF Core Technology which helps absorb impact, reduce de-hubbing and create a smoother ride. All Proto wheels are manufactured with bearing removal slots for quick and easy replacement. All Proto wheels are pre-installed with Proto bearings. These wheels also come with a limited 90-day warranty against chunking and de-hubbing.