A bike is something that you can ride on to go to places quicker than walking. You need to wear a helmet to keep safe when you are riding a bike. It is safer to wear a helmet on your head before you start riding. To fit your helmet on your head you have to put the strings into a Y instead of a V because it will come off when you start riding.The bike will go faster if you have more gears on your bike. Bikes have spooks on the inside of the wheel to also make it have a good place into making it move through the inside and the outside. When you go you up a high hill use your paddles as fast as you can to make up the hill fathers instead of going back down.