Quick Summary
The Partuto 31.8mm Aluminium Alloy Bicycle Seat Post Clamp is a black replacement clamp for a bicycle seat post. The stated clamp diameter is 31.8 mm, and the fit note says it suits seat posts measuring 30.2 mm to 32.1 mm outside diameter.
It is presented as suitable for MTB, mountain bike and road bike use. The product is made from aluminium alloy and the pack includes 1 clamp.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Partuto |
| Product type | Bicycle seat post clamp replacement |
| Clamp diameter | 31.8 mm – check this against the seat post size before choosing an offer. |
| Seat post fit note | Suitable for 30.2 mm to 32.1 mm seat posts. |
| Material | Aluminium alloy. |
| Colour | Black. |
| Pack quantity | 1 clamp. |
What to Compare Before Buying
- Seat post size: The stated clamp diameter is 31.8 mm, with a fit note of 30.2 mm to 32.1 mm. Measure the seat post outside diameter before ordering.
- Bicycle type: It is listed for MTB, mountain bike and road bike use, so compare the part against your bike setup.
- Pack quantity: The pack contains 1 clamp, which matters if you need a spare or a matched pair.
- Finish and material: The clamp is black aluminium alloy, which may matter if you are matching the look of an existing bike part.
Compatibility, Size and Fit
This clamp is the 31.8 mm version, so the key check is the seat post diameter. A seat post outside the stated 30.2 mm to 32.1 mm range is unlikely to be the right choice for this item.
If you are replacing an existing clamp, compare the measured size and the overall fit around your seat post before selecting an offer.
What Is Included
- 1 x bicycle seat post clamp
Before You Decide
Check the seat post outside diameter, confirm you need the 31.8 mm version, and make sure 1 clamp is the right quantity for your bike. If the fit is uncertain, measure the seat post before choosing an offer.









