How many speeds (gears) do the bikes have?

14-inch Bikes

1-speed, no coaster brake

16-inch Bikes

1-speed, no coaster brake

20-inch Small Bikes

1-speed, no coaster brake

20-inch Large Bikes

6-speed (gears), no coaster brake

24-inch bikes

7 speed "mega-range" (easier to go up hills than normal 7-speed bikes), no coaster brake