BIONIC BIKE XLMeet the STEPR BIONIC BIKE XL. A dual action air bike that finally adapts to your strength, size, and training goal. Featuring VPR adaptive resistance and optimized push pull handles, the BIONIC delivers total body output with total control. Use it for upper body only rehab, low cadence strength endurance, or max effort sprints. With over 100 levels of real time scalable resistance, this is the most versatile air bike ever built.