Allen Sports Central Aluminum 7 Speed Folding Bicycle with Suspension, White, 12-Inch/One Size 6061 Aluminum Frame and a patented four link front suspension deliver a great all around folding bicycle for every day use 7 Speeds provides wide gear range for easy hill climbs or fast treks on flat ground.Age Range: 15 years and up 451 MM Wheels deliver improved performance and handling over the standard 20" or 16" found on most folding bicycles Patented frame release levers allow quick and easy folding of bicycle in less than 8 seconds Patented wheel lock system secures the bicycle when folded and allows the bicycle to be rolled like a cart