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Register as a DealerThe ST-L124 Alloy Stem Adapter converts the fork steerer tube size to 28.6 mm / 1-1/8 inch, allowing it to be used with an ahead/threadless stem with a 28.6 mm clamp.
This product is suitable for older bicycles or certain setups that still use forks with a smaller steerer size but want to use a modern 28.6 mm stem.
Two bottom-size variants are available for the adapter: 21.1 mm and 25.4 mm. Choose the variant according to the inner size of the fork steerer being used.
| Variant | Description |
|---|---|
| 28.6–21.1 mm Black | Converts a 21.1 mm steerer to a 28.6 mm stem clamp size |
| 28.6–25.4 mm Black | Converts a 25.4 mm steerer to a 28.6 mm stem clamp size |
| Specifications | Details |
|---|---|
| Model | ST-L124 |
| Type | Stem Adapter / Steerer Tube Adapter |
| Material | Aluminum Alloy |
| Color | Black |
| Top Size | 28.6 mm / 1-1/8 inch |
| Bottom Size | 21.1 mm or 25.4 mm |
| Function | Converts the steerer tube size to be compatible with a 28.6 mm stem |
| Usage | Older bicycles, daily-use bicycles, certain folding bicycles, older MTBs, certain touring bikes |
Make sure the fork steerer size matches the selected adapter variant. The stem used must have a 28.6 mm / 1-1/8 inch clamp.
This product is not primarily intended to increase stem height, although the stem position may change depending on the installation setup. Its main purpose is converting the steerer size so it can be used with a 28.6 mm stem.