4130 High-Strength Steel. Stopping Power: CNC Machined Aluminum Hydraulic Disc Brakes.
ROCKBROS Gravis 20"Folding Gravel Bike 9-Speeds Disc Brakes Steel Frame Commuter
ROCKBROS Gravis 20"Steel Folding Gravel Bike 9Speed Disc Brake LUG Housing Craft
ROCKBROS 20" Folding Bike,Shimano 8-speed V Brakes,Lightweight Aluminium Frame
ROCKBROS 29"Mountain Bike MT400 10 Speed Disc BrakeAluminum Frame White M
ROCKBROS 20" Folding Bike Shimano 8-Speed Disc Brakes Lightweight Commuter
ROCKBROS ATS Classic 700C Road Bike 10-Speeds Aluminum Frame City Bike XS(420)
