How Does A Bike Hub Work

If you didn t quite catch some of the detail in the video or just want a closer look at the inner workings then here are some close up shots and even more information.

How does a bike hub work. You can read more about how these motors work in our main article about hub motors. Hub motors have to be able to produce any combination of speed and torque without a gearbox. Good bearings are a must. I show how a bicycle coaster brake hubs works including a cutaway shot of the hub so you can see the inside of it as it is working.

A bike with a coaster brake hub goes forward when you pedal. The freewheel is a 6 speed shimano but they all pretty much the same. The wheels the wheels are made of a hub the spokes the metal rim and the rubber tire. Because this is part of the drive train of the bicycle its efficiency greatly effects that of the whole bicycle.

How do you compare the range of a hub gear to derailleur gears. The cranks and the pedals. Internal bicycle gearbox demonstration duration. Gyde lund 32 859 views.

The seat and seat post. They usually work by direct drive but there s a snag. It must be light so it doesn t add too much weight to the rest of the bike. A hub gear bike s chainring sprocket and wheel size will give its direct drive gear.

The hub motor of an electric bike. Typical efficencies for internal hubs in good condition are between 94 and 98. If you took off the casing this is the kind of thing you d see. The brakes consisting of the actuators on the handlebars the brake cable the brake calipers.

I take an old freewheel apart and show you the parts that are inside and talk about how it works. Shimano hubs and some cheaper cartridge bearing hubs have a sealed freehub body design so you can t really service these instead they re a case of replace when knackered. In electric bikes they sit inside the hub at the very center of a relatively large spoked wheel. All the ratios are based on this and will be listed by the manufuacturer for example 0 75 1 1 33 for a 3 speed.

The front fork is the movable part of the frame that holds the front wheel. The handlebars and the handlebar stem that connects the handlebars to the frame. Take a look at the hub of an electric bike and probably you ll see it s much fatter and bulkier than on a normal bike. First you need to know how derailleur gears work.