---
product_id: 470476486
title: "CUNCUI 2pcs Bike Seat Clamps 31.8mm, for 27.2-28.6mm sitting pipe diameter, Seatpost Clamp, Premium Bike Seat Clamp, Inside Diameter of Seat Tube Clamp 31.8mm (Black)"
brand: "cuncui"
price: "$15.46"
currency: USD
in_stock: true
reviews_count: 9
category: "Cuncui"
url: https://www.desertcart.us/products/470476486-cuncui-2pcs-bike-seat-clamps-31-8mm-for-27-2
store_origin: US
region: United States of America
---

# Fits 27.2-28.6mm seatpost, 31.8mm clamp diameter Quick-release lever - tool-free seat adjustment 6061 aluminum alloy - lightweight & durable CUNCUI 2pcs Bike Seat Clamps 31.8mm, for 27.2-28.6mm sitting pipe diameter, Seatpost Clamp, Premium Bike Seat Clamp, Inside Diameter of Seat Tube Clamp 31.8mm (Black)

**Brand:** cuncui
**Price:** $15.46
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Lock in comfort, unlock your ride’s potential!

## Quick Answers

- **What is this?** CUNCUI 2pcs Bike Seat Clamps 31.8mm, for 27.2-28.6mm sitting pipe diameter, Seatpost Clamp, Premium Bike Seat Clamp, Inside Diameter of Seat Tube Clamp 31.8mm (Black) by cuncui
- **How much does it cost?** $15.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/470476486-cuncui-2pcs-bike-seat-clamps-31-8mm-for-27-2)

## Best For

- cuncui enthusiasts

## Why This Product

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

## Key Features

- • **Slip-Free Stability:** Internal notch design ensures zero seatpost slippage, keeping your ride smooth and secure.
- • **Value-Packed Twin Set:** Two clamps in one package at an unbeatable price—upgrade multiple bikes or keep a spare on hand.
- • **Effortless Seat Adjustments:** Quick-release lever lets you fine-tune saddle height anytime, anywhere—no tools needed.
- • **Universal Fit for Versatility:** Designed to snugly fit 27.2-28.6mm seatposts with a 31.8mm clamp diameter—compatible with most bikes.
- • **Premium Lightweight Durability:** Crafted from aerospace-grade 6061 aluminum for a perfect balance of strength and featherlight feel.

## Overview

The CUNCUI 2pcs Bike Seat Clamps are precision-engineered quick-release clamps made from durable 6061 aluminum alloy. Designed to fit seatposts between 27.2mm and 28.6mm with a 31.8mm clamp diameter, these clamps offer tool-free, secure saddle height adjustments with zero slippage. Lightweight yet robust, they come as a value twin pack, perfect for mountain, trail, or indoor bikes, ensuring a stable and comfortable ride every time.

## Description

Product description About Us What Cuncui delivers is not only household products . Each product comes from our designers' most meticulous experience of life. Bicycle Quick Release Seat Post Collar Bicycle Quick Release Seat Post Collar is a durable and lightweight alternative , and adjustable quick release to alter the height of your saddle for however you ride. Secure your seat post and saddle with the quick-release lever. Tighten the seat post clamp while setting your saddle height and experience zero slippage. Enjoy a seat post clamp that doesn’t slip on your frames seat tube with our clever internal notch. Suitable Size The inner and outer diameter of your frame's seat post tube before buying. This ensures a correctly fitted quick release clamp. High Quality Material It is made of hard-wearing aluminum alloy, which is stable and long life, has excellent elasticity and fatigue resistance, durable metal allow for better and smooth operation, provide additional durability for appropriate tension and variable precision. Unique Design Ergonomic design, without external key tool, more efficient. Quick release bike seat clamp, Seat clamp with extra long quick release lever for added clamping force. You can adjust your bike seat anytime, anywhere, make adjusting seat post height a breeze, super easy to lock and release.

Review: Great price and fit well - I like the fact that two of them came in the package for under $10. A lot of the other ones I looked at cost that much or more for one. The color matched the original seat clamp perfectly. It fit right over the downtube on my bike without any issues, have used it for several weeks now and I’ve had no issues with my seat post slipping or anything like that so it definitely has a good quality. May have taken all of 30 seconds to easily install it and the quick release makes adjusting my seat up and down , a breeze. Functions just like it should and fit right on the tube. You have to pay attention when putting it on, as one side of the hole is slightly larger than the other one to keep it from moving out of place. The clamp holds very well and is very easy to adjust the amount of clamping force, just by threading the nut down a touch more.
Review: well made, great buy - easy to install and kept the bike seat pole from sliding and twisting. Seems to be well made and they look great.

## Features

- 【High quality material】Our bicycle seat clamp is made of 6061 aluminum, light and durable, comfortable and safe.
- 【Widely used】Suitable for indoor and outdoor use, mountain bike, indoor bike, trail bike can be used, please confirm before ordering this bicycle seat clamp can be installed on your bike seat.
- 【Easy to install 】Low-cost solution, let you sit more comfortable, let you ride more smoothly, have a good mood.
- 【Compatible with multiple sizes】The inside diameter of the seat clamp is 31.8mm, suitable for 27.2/28.6mm sitting pipe diameter
- 【Unique design】Bike clips are quick-release lock design, quick disassembly, making riding more comfortable, stable and safe.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B4V4RY45 |
| Best Sellers Rank | #20,997 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #7 in Bike Seat Clamps |
| Brand | CUNCUI |
| Brand Name | CUNCUI |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 298 Reviews |
| Included Components | 2 seat clamps |
| Item Dimensions | 2.55 x 2.36 x 0.51 inches |
| Item Weight | 0.08 Kilograms |
| Item dimensions L x W x H | 2.55 x 2.36 x 0.51 inches |
| Manufacturer | CUNCUI |
| Material | Aluminum |
| Material Type | Aluminum |
| Set Name | Bike Seat Clamp Set (2 Piece) |
| Style | Modern |
| Style Name | Modern |
| UPC | 618087197775 |
| Unit Count | 2.0 Count |

## Product Details

- **Brand:** CUNCUI
- **Color:** Black
- **Item Weight:** 0.08 Kilograms
- **Item dimensions L x W x H:** 2.55 x 2.36 x 0.51 inches
- **Manufacturer:** CUNCUI
- **Material:** Aluminum
- **Style:** Modern
- **UPC:** 618087197775

## Images

![CUNCUI 2pcs Bike Seat Clamps 31.8mm, for 27.2-28.6mm sitting pipe diameter, Seatpost Clamp, Premium Bike Seat Clamp, Inside Diameter of Seat Tube Clamp 31.8mm (Black) - Image 1](https://m.media-amazon.com/images/I/61bQLz4zJDL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great price and fit well
*by B***N on October 30, 2024*

I like the fact that two of them came in the package for under $10. A lot of the other ones I looked at cost that much or more for one. The color matched the original seat clamp perfectly. It fit right over the downtube on my bike without any issues, have used it for several weeks now and I’ve had no issues with my seat post slipping or anything like that so it definitely has a good quality. May have taken all of 30 seconds to easily install it and the quick release makes adjusting my seat up and down , a breeze. Functions just like it should and fit right on the tube. You have to pay attention when putting it on, as one side of the hole is slightly larger than the other one to keep it from moving out of place. The clamp holds very well and is very easy to adjust the amount of clamping force, just by threading the nut down a touch more.

### ⭐⭐⭐⭐⭐ well made, great buy
*by A***L on April 24, 2026*

easy to install and kept the bike seat pole from sliding and twisting. Seems to be well made and they look great.

### ⭐⭐⭐⭐ It fits, but don't overtighten
*by M***A on July 29, 2024*

It fit fine on my post. However, I think the screw or thread seems a bit fragile. I was experimenting with how much to tighten it and when it was a bit too tight, it felt like it was about to break. I didn't force it so nothing bad happened but it doesn't seem as robust as the OEM quick release clamps I have used in the past. It's good that it comes in a pair as frequent use will probably wear it out.

## Frequently Bought Together

- CUNCUI 2pcs Bike Seat Clamps 31.8mm, Seatpost Clamp, Premium Bike Seat Clamp, Inside Diameter of Seat Tube Clamp 31.8mm (Black)
- Boenoea Bike Seatpost, Bicycle Seat Post 25.4 27.2 28.6 30.4 30.9 31.6 400mm Length Aluminum Alloy Bicycle Seat Tube for Mountain Bike and Road Bike, MBX
- Comfortable Seat Cushion for Men Women with Dual Shock Absorbing Ball Memory Foam Waterproof Wide Bicycle Saddle Fit for Road Bikes

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/470476486-cuncui-2pcs-bike-seat-clamps-31-8mm-for-27-2](https://www.desertcart.us/products/470476486-cuncui-2pcs-bike-seat-clamps-31-8mm-for-27-2)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-10*