---
product_id: 235677239
title: "Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed"
brand: "bestpartscom"
price: "€ 13.28"
currency: EUR
in_stock: true
reviews_count: 8
category: "Best Parts Com"
url: https://www.desertcart.ie/products/235677239-round-oval-104bcd-32t-34t-36t-38t-40t-42t-44t
store_origin: IE
region: Ireland
---

# 104BCD Bolt Circle Diameter - Universal Fit 7075 Aluminum Alloy - Ultralight & Durable Narrow-Wide Teeth - Superior Chain Retention Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed

**Brand:** bestpartscom
**Price:** € 13.28
**Availability:** ✅ In Stock

## Summary

> 🚴‍♀️ Elevate Your Ride: Lightweight Power Meets Precision Engineering

## Quick Answers

- **What is this?** Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed by bestpartscom
- **How much does it cost?** € 13.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/235677239-round-oval-104bcd-32t-34t-36t-38t-40t-42t-44t)

## Best For

- bestpartscom enthusiasts

## Why This Product

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

## Key Features

- • **Oval & Round Options:** Customize your cadence and power output with versatile tooth counts from 32T to 52T for every terrain.
- • **Seamless Compatibility:** Fits most Shimano and SRAM cranksets with 104BCD, making upgrades effortless and reliable.
- • **Narrow-Wide Tooth Design:** Say goodbye to chain drops and noise—ride smoother with optimized chain retention and reduced friction.
- • **Effortless Installation & Maintenance:** CNC machined for perfect fit and finish—upgrade your drivetrain in minutes and ride with confidence.
- • **Precision Engineered 7075 Aluminum Alloy:** Experience featherlight strength with aerospace-grade material that outlasts the competition.

## Overview

This ultralight bicycle chainring crafted from high-quality 7075 aluminum alloy features a narrow-wide tooth profile designed to maximize chain retention and reduce noise. Compatible with 7 to 11-speed drivetrains and most Shimano and SRAM cranksets with a 104BCD bolt circle diameter, it offers a range of 32 to 52 teeth in both round and oval shapes. CNC machined for precision and durability, it delivers a smooth, efficient pedaling experience that enhances performance and reduces energy loss.

## Description

Features:100% Brand new and high quality!Narrow wide tooth profiling prevents chain dropExquisite workmanship with high technology that the chain can effect better.It is protable and durable.Easy to use and to operate.Positive tooth corresponding chian tooth width; tooth corresponding negative chain is narow.Specifications:* Quantity: 1* Brand: BestParts* Color: Black/Red* Shape: Round/Oval* Teeth: 32T/34T/36T/38T/40T/42T/44T/46T/48T/50T/52T* Material: A7075 Aluminium Alloy* Bolt Center Diameter: 104mm* Thickness:4mm, 2mm(narrow),3.8mm(wide)* Weight: 32T 41g; 34T 51g; 36T 63g; 38T 3g; 40T 78g; 42T 89g; 44T 99g; 46T 116g; 48T 124g; 50T 136g; 52T 151g.* Narrow-wide tooth profiling prevents chain drop without a chainguide* Compatible with 7/8/9/10/11 speed chains* Narrow Wide tooth profiling ensures ultimate chain retention with 1x chains.You'll Receive1pcs 104BCD Chain Ring.

Review: Affordable, Oval lightweight chainring - Not a lot of mystery here, a simple light weight chain ring. Does what I want it to on my bike. Easy fit. Makes the peddling feel similar to a more expensive brand I have on a different bike.
Review: Surprisingly good. - Wasn't sure if the oval design was all hype, but am starting to like it after some miles. It does change the pedaling cadence and requires time to adapt. The learning curve is short though and the oval design saves a lot of energy that's normally wasted on a traditional round gear. Install is easy, definitely use some thread locker though.

## Features

- * Material: High quality 7075 aluminum alloy,Anodized surface.
- * The new narrow-wide teeth design increases chain retention, wear life, and reduces friction and noise.
- * Larger wide tooth design provides maximum ring durability and drop performance.
- * Suitable for most of Shimano and Sram cranksets, Please confirm that your crank BCD specification is correct before purchase.
- * PACKAGE INCLUDE: 1 pcs 104BCD narrow wide chainring.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08G7YRNLB |
| Best Sellers Rank | #424,642 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #298 in Bike Chainrings |
| Brand | BestPartsCom |
| Brand Name | BestPartsCom |
| Color | Black Round |
| Customer Reviews | 4.3 4.3 out of 5 stars (127) |
| Date First Available | July 30, 2020 |
| Item Package Dimensions L x W x H | 9.69 x 9.65 x 0.2 inches |
| Load Capacity | 1E+2 lbf |
| Manufacturer | BestParts |
| Material | Aluminium Alloy |
| Package Weight | 0.17 Kilograms |
| Part Number | XE.EE.133 |
| Plate Thickness | 4 Millimeters |
| Size | 48T |
| Strand Type | Single |
| UPC | 731938803554 |

## Product Details

- **Brand:** BestPartsCom
- **Load Capacity:** 1E+2 lbf
- **Material:** Aluminium Alloy
- **Plate Thickness:** 4 Millimeters
- **UPC:** 731938803554

## Images

![Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed - Image 1](https://m.media-amazon.com/images/I/61CYx5Oy6+S.jpg)
![Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed - Image 2](https://m.media-amazon.com/images/I/715QbWHLNbL.jpg)
![Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed - Image 3](https://m.media-amazon.com/images/I/71yG1k7HT1L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Affordable, Oval lightweight chainring
*by J***E on September 10, 2023*

Not a lot of mystery here, a simple light weight chain ring. Does what I want it to on my bike. Easy fit. Makes the peddling feel similar to a more expensive brand I have on a different bike.

### ⭐⭐⭐⭐⭐ Surprisingly good.
*by M***S on January 19, 2026*

Wasn't sure if the oval design was all hype, but am starting to like it after some miles. It does change the pedaling cadence and requires time to adapt. The learning curve is short though and the oval design saves a lot of energy that's normally wasted on a traditional round gear. Install is easy, definitely use some thread locker though.

### ⭐⭐⭐⭐⭐ great chain ring for the money.
*by J***L on January 14, 2021*

i bought this ROUND aluminum DECKAS 38T chainring to replace my stock STEEL shimano 36T chainring that came on my shimano steps e motor. great variaty of sizes and color of chainrings. for the Money you cant loose. the red chainring is trick looking against an all black bicycle.

## Frequently Bought Together

- BestPartsCom Round Oval 104BCD 32T 34T 36T 38T 40T 42T 44T 46T 48T 50T 52T Narrow Wide Single Chainring 1X System AL7075 CNC Ultralight Bicycle Bike Chainwheel Chain Ring 8/9/10/11-Speed
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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-16*