The 9F Hub's Design & Advantages - the result of years of extensive R&D and testing, the 9F is the most technologically advance 50mm hub available, providing:

• Superior heat dissipation & more consistent tire temperature
• Superior fit resulting in enhanced axle stiffness
• 95mm length perfect for 100cc and TAG classes

Innovation - The 9 hole design allows for superior heat dissipation.

When combined with the 9F Wheels with matching holes, a heat extraction effect is created, further improving the heat dissipation and helping maintain a consistent tire pressure even on the hottest days.

High-Quality Fit - The hub's "small bolt" functions as a pivot allowing a smaller inner hub diameter. Unlike classic hubs, the 9F more completely contacts the axle resulting in increased axle stiffness. This tighter adherence also helps prevent hub movement during a race.