MPC Black Magic XX FIRM Inline Speed Wheels \n The newest MPC Black Magic XX Firm Wheels are the best formulation ever, which will give you a great grip. The MPC Black Magic has the 300 mm world record. Available in 80, 84, 90, 100 & 110 mm \n Outdoor wheels XX FIRM Features MPC Black Magic XX FIRM Inline Speed Wheels The MPC Black Magic is simply MPC's best formulation ever, which offers excellent grip, roll, and wear characteristics in a stiffer Black Turbo hub. This wheel proved itself at the World Championships, breaking the 300 m world record and proving that a wheel that is half a second per lap faster than the competition will take you to the top of the podium. With zero tolerance for defects and a demand for excellence, you can rely on the MPC Black Magic for very consistent performance, no matter where you race next. The MPC Black Magic XXFirm will be best for: Straight-line speed“all-road/track surface efficiency - energy-saving rebound - reliable grip - M-tech® optimization Enjoy!!!! Technical Specification Roll Firm: when race conditions are rough or slick Roll X-Firm: when race conditions are hard, smooth and dry Roll XX-Firm: when race conditions are perfect, hard, smooth, and fast. MPC Black Magic Firm Durability Best for a Sprint Best Grip In tight Corners Hardness 83A/60A (Soft) Wheels Rebound Highest Snap Back Roll Consistent Fast Application Road Circuit MPC Black Magic XFirm Durability Good for Marathon Best Grip In All Conditions Hardness 85A / 60A Medium Wheels Rebound Highest Stability Roll Consistent Fast Application All-round outdoor MPC Black Magic XXFirm Durability Highest durability Best Grip On Smooth Asphalt Hardness 87A/60A (Hard) Wheels Rebound High Stability Roll straight-line speed Application Road Marathon and All-Round Outdoor