The K2 Redline is a collaboration with Madshus that allows you to go seriously fast. Inline skaters and athletes worldwide receive the next evolution of lightweight, high-speed marathon skates with the K2 Redline. The new Redline 110 features the Carbon Cuff and Carbon Base from the Madshus Redline boots, which regularly win medals in cross-country skiing and biathlon World Cups. The Memory Foam ensures that your foot fits perfectly in the shoe, providing comfort even at high speeds. The Redline Cuff is removable, so you can feel comfortable at all times. The cuff offers lateral stability while maintaining consistent frontal movement space. We have elevated power transfer for the Redline to a new level in collaboration with Madshus. But it also requires a wheel that delivers the right punch. Flash Disc – the fastest and most aerodynamic wheels of all time. This is your chance to stand on the podium.