What Does A Free Hub Do?

How does a free wheeling bike hub work?

That clicking sound is the pawls as they run across each ratchet tooth, sort of like a tiny Wheel of Fortune wheel.

The pawls thread onto the hub body and spin whenever the bike is moving.

The ratchet fits over the pawls..

What is the difference between a freewheel and a freehub?

Older bikes may have a large external thread machined into the hub. The cogs and ratcheting body assembly, called a “freewheel,” threads onto the hub. … If the fittings spin with the cogs, it is a cassette system with a freehub. If the tool fittings do not spin with the cogs, it is a threaded freewheel system.

Why are bike hubs loud?

Chris King hubs sound the way they do because of their spiral gearing and twice the amount of pawls of most hubs. The intent is instant power applied when you pedal, instead of wasting any pedal stroke as happens with a normal pawl system. This is because on a King hub there are always pawls engaged.

Are cassettes better than freewheels?

A cassette is the more modern option and has quickly overtaken the freewheel. It comprises a collection of independent cogs set on layered rings that come apart and slot onto the body of the (also more modern) freehub component.

How do I know if my free hub needs replacing?

Check the freehub for wear to see if it needs replacing or just cleaning and relubing. To do this, firmly grab the splined body and give it a wiggle. If it moves more than a couple of millimetres side to side, replace it. Otherwise, a good clean and oil will do fine.

Do hubs make a difference?

Hubs that are “louder” usually have more engagement points. This means your drivetrain picks up faster, so less energy is lost. Hubs that have sealed cartridge bearings or needle bearings usually never need to be replaced, they’re far stronger and stay cleaner.

Why is freewheeling dangerous?

Freewheeling is putting the car in neutral and letting the gravity maintain the car’s momentum. Why is it dangerous? … When your car is in neutral, there is no power being sent to the wheels, meaning that if you have to step on the gas to avoid something, you will not be able to accelerate out of harms way.

How do I replace my free hub?

Step 1: Diagnose the Problem! … Step 2: Remove the Cassette. … Step 3: Remove the Axle. … Step 4: Remove the Broken Freehub Body. … Step 5: Find a Replacement Freehub Body. … Step 6: Install New Freehub Body. … Step 7: Replace the Axle. … Step 8: Install Cassette.More items…

Do all cassettes fit all hubs?

Most cassette hubs are compatible with Shimano cassette cogs. SRAM cassettes and most Miche, IRD and SunRace cassettes use the same inter-sprocket spacing as Shimano, but at least some SRAM 10-speed cassettes do not fit aluminum-body Dura-Ace hubs.

When should I replace my freewheel?

The old freewheel is worn to the old chain, and will skip on the new chain. However, it’s not usually worth replacing unless you test it and verify that it’s worn badly enough to skip. If it doesn’t skip, you’re fine.

How does a free hub work?

The freehub is the ratcheting mechanism attached to the rear hub of most modern derailleur bike hubs. The freehub uses a splined cylinder to hold the cassette cogs. Inside the freehub mechanism will be bearings and a clutch system, usually ratcheting teeth and pawls. The cassette cogs have no moving parts.