Diamondback 2013 Insight STI-8 Performance Hybrid Bike with 700c Wheels Butted 6061-T6 Aluminum Insight Performance Hybrid Frame Insight Integrated Alloy Aero Straight Blade Fork Single Gear Crankset w/ Integrated Chainguard Shimano Nexus 8-spd w/Nexus Twist Shifter Equation R23 Double Wall Alloy Rims