Built like a tank out of robotic steel monococque, the Schwinn® Evolution Group Cycling Bike builds upon the popular Schwinn® IC Pro model by adding a sturdier frame, trapezoidal in shape, which creates a "wedge effect" for increased stability. It features a specially designed seat and handlebar adjusters to even further increase stability, and a Shimano sealed-cartridge bottom bracket. By combining true road-racing geometry with high quality cycling components, you can cycle at far higher RPMs on the Evolution. Designed for in and out-of-saddle riding, the handlebars are adjustable to a variety of positions. You can control resistance easily with a readily accessible knob – press down on the brake lever if you need an emergency stop. The 38 lb flywheel with sealed bearing hubs further simulates a road-bike feel, and resistance levels are infinitely variable.