A kit that can convert any bike to a single speed. This is about converting a geared hub to a single speed.
There are two key points when building a single-speed bike.
These are the frame standard and the hub standard.
Today, we'll talk about hubs. This information will be particularly useful if you're considering converting a geared hub to a single speed.
While using a dedicated single-speed hub is the smartest and most reliable way to build a single-speed bike, you can also convert a geared hub if you already own one or want to leverage its benefits.
In such cases, you will need a dedicated kit that matches the specifications of the hub you are using. Recently, single-speed kits for Shimano MS (Micro Spline) freehubs have become available, making it possible to convert most geared hubs to single speed.
First, let's review geared hub standards.
There are three main types of freehub bodies for mounting sprockets on geared hubs.
Shimano HG
SRAM XD
Shimano MS
Since these are not interchangeable, you'll need a kit compatible with each respective standard.
Below is a summary of their features.
Shimano HG Freehub Kit
Cogs are sold separately and 13T or larger are compatible. Any Shimano HG-compatible cog can be used, regardless of manufacturer.
The chainline can be adjusted by changing the position of the spacers.
Given its long history, it offers high versatility.
Price: ¥8,415 (cog sold separately)
SRAM XD Freehub Kit
REVERSE Components XD SINGLE SPEED KIT 13T/14T
The cog tooth count cannot be changed and is fixed at 13T or 14T. This kit is designed for MTBs and features a heavy gear ratio.
The chainline is fixed, so if adjustment is needed, it should be done on the chainring side.
Price: ¥12,980
If you prefer a slightly lighter gear, this might be a better option.
PROBLEM SOLVERS ZINGER SINGLE SPEED CONVERSION KIT FOR XD (Coming Soon)
It comes standard with 18T and 20T cogs, and can accommodate 16T to 22T with separately sold dedicated cogs.
The chainline can be adjusted by changing the position of the spacers.
Price: ¥10,890
Shimano MS Freehub Kit
PROBLEM SOLVERS Zinger Single-Speed Conversion Kit for Micro Spline
It comes standard with 18T and 20T cogs, and can accommodate 16T to 22T with separately sold dedicated cogs.
The chainline can be adjusted by changing the position of the spacers.
Price: ¥14,080
Above, we've introduced the features of kits used to convert geared hubs to single speed.
By choosing a kit compatible with your hub's specifications, you can easily build a single-speed bike.
When converting to single speed, a chain tensioner may also be required depending on the frame standard. We'll cover chain tensioners another time.