Park Row 3-Speed City Cruiser by Sole Bicycles Easily switch between 3 different gears Shimano Nexus Internal Three Speed Hub - No Maintains 46cm Fits Riders 4'10" - 5'2", 50cm Fits Riders 5'3" - 5'7", 54cm Fits Riders 5'8" - 5'11" 700x28c Tires = MAX Comfort Arrives 90% assembled