20" Aluminum Alloy Folding Bike Shift lever, derailleur: SHIMANO 20" Aluminum Alloy Folding BikeAluminum handle bar, chainwheel and crank, rims, hubs Shift lever, derailleur: SHIMANO 20"Folding Bike ... of Aluminum; Easy to Handle Lightweight Frame Adjustable Seat Height Fits Inseams Ranging from 20" and UP 95% Pre-Assembled 20" Aluminum Alloy Folding ...