---
product_id: 619646325
title: "Bike Seat Clamp 31.8mm/ 1.25 inch with Installation Holes for Bicycle Rear Rack Bike Cargo Rack Aluminium Alloy Seat Post Clamps, Black"
brand: "weerock"
price: "€ 20.79"
currency: EUR
in_stock: true
reviews_count: 3
url: https://www.desertcart.fi/products/619646325-bike-seat-clamp-31-8mm-1-25-inch-with-installation
store_origin: FI
region: Finland
---

# Screw locking system 40g lightweight 31.8mm diameter Bike Seat Clamp 31.8mm/ 1.25 inch with Installation Holes for Bicycle Rear Rack Bike Cargo Rack Aluminium Alloy Seat Post Clamps, Black

**Brand:** weerock
**Price:** € 20.79
**Availability:** ✅ In Stock

## Summary

> 🚲 Elevate your cycling game with the ultimate seat clamp!

## Quick Answers

- **What is this?** Bike Seat Clamp 31.8mm/ 1.25 inch with Installation Holes for Bicycle Rear Rack Bike Cargo Rack Aluminium Alloy Seat Post Clamps, Black by weerock
- **How much does it cost?** € 20.79 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/619646325-bike-seat-clamp-31-8mm-1-25-inch-with-installation)

## Best For

- weerock enthusiasts

## Why This Product

- Trusted weerock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **🔒 Secure Fit:** Screw locking mechanism ensures your seat stays put, no matter the terrain.
- • **🖤 Sleek Aesthetic:** Available in a stylish black finish that complements any bike design.
- • **🌟 Lightweight Champion:** At just 40g, it won’t weigh you down on your cycling adventures.
- • **🛠️ Easy Installation:** Designed with rear rack installation holes for hassle-free setup.
- • **🚴‍♂️ Upgrade Your Ride:** Transform your bike with a sleek, sturdy clamp that fits perfectly.

## Overview

The Bike Seat Clamp 31.8mm/1.25 inch is a robust and lightweight solution for cyclists looking to install a rear cargo rack. Made from durable aluminum alloy, it weighs only 40g and features a secure screw locking system to keep your seat stable. Perfect for bikes lacking rear rack installation holes, this clamp combines functionality with style.

## Description

WEEROCK Bike Seat Clamp 31.8mm/ 1.25 inch with Installation Holes for Bicycle Rear Rack Bike Cargo Rack Aluminium Alloy Seat Post Clamps, Black

## Features

- Suits for: Suitable for bicycles with a seat tube diameter of 31.8mm/ 1.25inch. Before purchasing, please confirm that your middle pipe diameter is 31.8mm/ 1.25inch. You can measure the diameter of the seat pipe clamp that was removed from the your bike
- With Rear Rack installation holes: If you want to install a rear cargo rack on your bike, but the bike does not have rear rack installation holes, you could choose our product. It is not only a seat clamp, but also comes with a rear rack installation holes, so you can install a rear luggage rack on your bike
- Material: It's aluminium alloy material, the weight only 40g, sturdy and non rusting, lightweight, without adding to the weight of the bicycle
- Screw locking: Use tools to lock the screws tightly to better lock the saddle tube, so that the saddle tube will not slide and the seat will not move during cycling
- Packing including: 1 pcs seat clamp, 2 pcs screws(If there are screws on the rear rack, these two screws will not be used)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 40 Grams |
| Color | 31.8mm/1.25inch Black |
| Material | Aluminum |

## Images

![Bike Seat Clamp 31.8mm/ 1.25 inch with Installation Holes for Bicycle Rear Rack Bike Cargo Rack Aluminium Alloy Seat Post Clamps, Black - Image 1](https://m.media-amazon.com/images/I/61jX12onGeL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Perfect fit
  

*by D***E on Reviewed in the United States on February 26, 2024*

Just what I needed for my e-bike rack

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    This clamp works great. But the manufacture name is printed on it upside down?
  

*by A***T on Reviewed in the United States on February 28, 2024*

Added a rack to my bike and needed a seat post clamp with mounts to install the rack. Found this on Amazon and sale photos all showing correct orientation. But when delivered this clamp has a standard 31.8 opening with a stop to prevent clamp from sliding down the post tube. But when installed correctly on post tube the manufacture name is upside down? Will order a second clamp to see if this was a fluke. But be aware of this problem when ordering?

### ⭐ 1.0 out of 5 stars







  
  
    Doesn’t fit
  

*by C***N on Reviewed in the United States on May 20, 2024*

There’s a millimeter lip on the inside of one side making it impossible to get on the tube. Returning.

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**Shop now:** [https://www.desertcart.fi/products/619646325-bike-seat-clamp-31-8mm-1-25-inch-with-installation](https://www.desertcart.fi/products/619646325-bike-seat-clamp-31-8mm-1-25-inch-with-installation)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-15*