Quick Summary
The AUTOHAUX 2-piece bicycle seat post adapter is a black adapter set for converting a 27.2 mm seat post tube to 30.0 mm. It is made from aluminium alloy and is described as a direct-fit part that installs without drilling, cutting or tools.
Use it when the seat tube size needs to match the stated adapter range. The main checks are the 27.2 mm inner diameter, 30.0 mm outer diameter and the fit of the bicycle seat tube before choosing an offer.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | AUTOHAUX, which helps identify the exact part. |
| Quantity | 2 pieces, so check whether this matches the number of bikes or seats you need to fit. |
| Size | 27.2 mm to 30.0 mm, with an inner diameter of 27.2 mm and an outer diameter of 30.0 mm. |
| Length | 60 mm, which is a practical fit check for the seat tube area. |
| Material | Aluminium alloy. |
| Colour | Black. |
What to Compare Before Buying
- Seat tube size: The adapter is for a 27.2 mm to 30.0 mm fit, so compare those measurements with your bicycle.
- Pack quantity: This is a 2-piece set, so confirm that quantity suits your setup.
- Installation approach: It is described as tool-free, so check that this matches the fitting method you want.
- Bike fit: It is stated as suitable for most bicycles, including MTB bikes, mountain bikes and road bikes, so confirm the size match first.
Choosing the Correct Version
Seat post adapters are chosen by size first. For this part, the key figures are 27.2 mm inner diameter, 30.0 mm outer diameter and 60 mm length. Check the seat tube measurements on the bicycle before selecting the adapter.
Before You Decide
Confirm the 27.2 mm to 30.0 mm size match, the 2-piece quantity and the black finish before choosing an offer. If the seat tube measurements do not match, a different size is needed.









