Quick Summary
The PLATT Bike Seat Post Clamp is a quick release seatpost collar for bicycles. It is made from aluminium alloy and comes in 28.6 mm, 31.8 mm and 34.9 mm sizes, so the key decision is matching the clamp size to the frame seat tube.
The clamp is described as a lightweight, anodised option with a hollow design, and the stated finish colours are Black, Blue, Gold, Red and Silver.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | Quick release seat clamp for a bicycle seatpost. |
| Material | Aluminium alloy. |
| Sizes | 28.6 mm, 31.8 mm and 34.9 mm clamp sizes. The correct size needs to match the frame seat tube. |
| Fit guidance | 28.6 clamp suits frame seat tube 27.8 mm-28.8 mm; 31.8 clamp suits 30.2 mm-32.1 mm; 34.9 clamp suits 33.5 mm-35.2 mm. |
| Finish | Anodised finish in Black, Blue, Gold, Red and Silver. |
| Weight | About 39 g for the 34.9 clamp. |
What to Compare Before Buying
- Clamp size: Choose the size that matches the frame seat tube range, not just the seatpost itself.
- Seat tube outside diameter: Measure the actual frame seat tube outside diameter before selecting a clamp.
- Finish colour: Select the colour that suits the bike if appearance matters.
- Weight: The stated weight is about 39 g for the 34.9 clamp, which may matter if you are comparing similar parts.
Compatibility, Size and Fit
This clamp is size-specific. The 28.6 mm clamp is stated to suit frame seat tube 27.8 mm-28.8 mm, the 31.8 mm clamp suits 30.2 mm-32.1 mm, and the 34.9 mm clamp suits 33.5 mm-35.2 mm. Measure the frame seat tube outside diameter carefully before choosing a size.
Before You Decide
Confirm the frame seat tube outside diameter, then choose the matching clamp size. Check whether you want the 28.6 mm, 31.8 mm or 34.9 mm version, and make sure the finish colour and quick release format suit the bike.
