Columba 20" Steel Folding Bike w. Shimano 7 Speed Black (LW20S_BLK) 20" wheels, compact folding steel frame & steel fork. Shimano 7 speed shifter and derailleur. Promax steel front/rear V-brake. alloy rim. foldable pedals. quick removable front handle stem. with fender and rear carrier. with alloy silver cap & PVC black bell. Kenda 20"x1.75" tire. front/rear steel hub. steel kick stand.