Single Speed Conversions: Freehubs
This is a Freehub:
The 'Freehub Body' the blobby bit above contains the freewheeling mechanism for the bike.
Onto this slide the sprockets which the chain runs over to drive the bike. For a Single Speed Set Up you slide one sprocket and a load of spacers to 'pack out' the hub, as here:
With either system you then lock the sprocket/s on with a lock ring (to the right of the last spacer in the image above).
Here are four things to know about in relation to Freehub Wheels and Single Speed Cycling:
- Freehub Wheels Can Not Be Used for Fixed Gear: the freewheeling mechanism is inside the wheel already, you can't disable it
- Freehub Wheels Are Designed For: 700c and 26" Mountain Bikes with 130mm or 135mm wide frames. We'd not usually recommend them for anything else
- With a Freehub Wheel you can Alter the Position of your Sprocket Easily: This means you can replace your chainset at the front of the bicycle and easily compensate for any change in position to achieve a straight, derailment proof chain. Or if you are keeping your existing chainset we'll have no issues getting the rear cog in line with it
- Freehub Technology Is Considered Superior in Performance: to the older technology of a threaded hub and a freewheel screwed onto it. So if you have a freehub wheel already or have a bike which can accommodate a freehub wheel, it could be a good option!