Freewheel cog (screw on type). Easy to install by screwing on by hand and pedaling will tighten this.
Shimano RD-TZ500 6 Speed Direct-Mount 6 Speed Rear Bike Derailleur
Mountain Bikes Gear Shifter - Bicycles Twist Shifter 6 Speed Lever, Bike Riding Component, With Easy Handling | Shift Speed Replacement Brake Parts for Motorcycle, Road Riding, ATV, Dirt,
wanwanper 20 Inch Folding Bicycle for Adults, 6-Speed Portable Bike for Commuting & Outdoor Play, Compact Foldable Design for Easy Storage, Adjustable Height, White, Up to 90 KG
MIIWWOWO Folding Bikes for Adult 20 Inch - 6 Speed Foldable Bike - Adjustable Seat & Armrest Height - Withe Fold Up Road Bikes City Bicycle for Adults Teens Men Women
HPUYRFG 20 Inch 6-Speed Mountain Bike with Adjustable Handlebars and Seat, Durable Steel Frame and Fork for Versatile Performance, Classic Design with Anatomical Saddle and Rubber
Women’s 6 Speed City Bike 700C Hybrid Purple
