Columba 20" Alloy Folding Bike w. Shimano 7 Speed Silver (R20A_SLV) 20" wheels, folding alloy frame & steel fork. Shimano 7 speed shifter and derailleur. alloy front/rear V-brake. alloy rim. foldable bearing 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.