Lamborghini Urbano Mens Comfort Hybrid Bike (700c Wheels) 20" Custom designed 7005 Aluminum Frame 700C CS-9217 Steel fork Drive train: Shimano TX30D rear derailleur, and Shimano TZ31 21 speed grip shifters matched with silver Alloy crank Wheels; 700C High V profile alloy silver rims Brakes; Cable activated front and rear