Quick Summary
The sourcing map 1 1/4″ OD Bike Headset Stem Top Cap is a black bicycle headset cover with an M6 bolt. It is described as a top cap for cycling headset stems, with an outer diameter of 1 1/4″ (31.8 mm).
For buyers, the key checks are the headset stem size, the included bolt type and the exact colour. This is a small fitting, so matching the dimensions to your bike matters more than the product style alone.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | Bike headset stem top cap. It covers the headset stem area on a bicycle. |
| Brand | sourcing map. |
| Outer diameter | 1 1/4″ (31.8 mm). Check this against the headset stem size before buying. |
| Colour | Black. |
| Bolt | M6 bolt. Confirm this matches the fitting you need. |
| Material | Aluminum alloy. |
What to Compare Before Buying
- Headset size: This cap is stated as 1 1/4″ (31.8 mm). Match that measurement to your headset stem.
- Bolt size: The included fixing is an M6 bolt. Check that your setup uses the same fitting.
- Finish and colour: The cap is black, which matters if you are matching existing bike parts.
- Exact part type: This is a headset stem top cap, not a complete headset or stem.
Choosing the Correct Version
Headset caps are size-specific, so the main decision is whether the 1 1/4″ (31.8 mm) version matches your bike. The bolt type also matters, especially if you are replacing an existing cap rather than fitting a new one.
Before You Decide
Confirm the 1 1/4″ (31.8 mm) size, the M6 bolt and the black finish before choosing an offer. Make sure you are comparing a headset stem top cap rather than a different headset part.
