Diamondback Bicycles Boy's Insight Performance Youth Hybrid Bike (24-Inch Wheels), One Size, Black INSIGHT 24" Light alloy frame w/replaceable hanger Insight Jr. Aero Alloy straight blade 165mm Alloy w/chainguard 34/42t Shimano Front and Rear Derailleurs w/RS35 Revo 7spd Twist Shifters