K2 Skates - VO2 Max (Black) - Men's: The VO2 Max is the skate that's bringing big wheel technology to the masses. This model features the X-training frame, ILQ-9 bearings, and 90mm (83A) wheels. The VO2 Max has a standard upper height, full lacing, powerstrap, and buckle for maximum enclosure and support. This combination provides the total package of speed and support to build confidence in all skaters. Cuff: Enhanced Stability M/W.