84 mm rollers are probably the most versatile outdoor fitness equipment available on the market. But we'll let you decide. In 2022, the K2 84 mm fitness series features an entirely new upper material that fits comfortably on the foot while being breathable and providing performance. The aluminum frame ensures stable and agile riding with its more direct power transfer. The K2 Speed Lacing System offers an outstanding fit and adapts to any foot shape. All our K2 Alexis models are ideally suited for narrow feet and a low footbed. Additionally, the cuff has been shaped for a lower calf position. Thanks to a variety of clever details, the K2 Alexis 84 Pro brings you closer to your fitness goals.