X- Formula™ (XF) is another industry leading innovation from the BONES WHEELS factory. X-Formula rolls over rough terrain like softer wheels do, but slides more like a harder wheel would.

Speed: X-Formula™ is extremely fast because it has a super high rebound. They roll much smoother and faster on all terrains because it absorbs vibration and softens impacts much better.

Grip & Slide: The slide-ability comes from its unique blend of high performance materials. X-Formula will slide when you need it to, and grip when you want it most. This is because X-Formula has been developed over a ten year period to optimize performance and fine tuned to perfection making it a very unique product.

Durability: X- Formula™ is smooth, fast and durable. It has been developed using the highest quality, longest lasting materials, resulting in a great value. Additionally, because it softens landings and absorbs vibration, it is also better on your body which can add longevity to your days of skating.

Features:

• 54mm Diameter
  
  
• 99A Durometer