Decide What Gears To Use
Cassette or freewheel?
There are 2 types of hubs you can choose from, cassette and freewheel. Many people also call them the freehub and the threaded hub. The difference between these two is coasting.
With a freewheel (threaded hub), you can coast backward. The pedals will stop rotating when you stop pedaling. The wheels, however, will keep rolling on. This hub usually sports 5-7 cogs. It’s from 120 – 126 mm in diameter.
A cassette hub, on the other hand, will make the pedals continue to rotate even when you stop pedaling. That means there’s no coasting backward on this one. Cassette hub usually sports 7-11 cogs. It has the ratcheting mechanism built right into the hub body.
Shimano HyperGlide is a very popular cassette many riders use today.
Next, you can decide what type of shifter pod you would like to have.