---
product_id: 110054741
title: "OSPW Oversized Pulley System Cage - Compatible with Shimano Dura-Ace R9100 Ultegra R8000 - Sealed Bearings"
brand: "kcnc"
price: "₪526"
currency: ILS
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.il/products/110054741-ospw-oversized-pulley-system-cage-compatible-with-shimano-dura-ace
store_origin: IL
region: Israel
---

# 7075 Alloy Material 28 Teeth 30-60% Power Savings OSPW Oversized Pulley System Cage - Compatible with Shimano Dura-Ace R9100 Ultegra R8000 - Sealed Bearings

**Brand:** kcnc
**Price:** ₪526
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Elevate Your Cycling Game with KCNC's OSPW System!

## Quick Answers

- **What is this?** OSPW Oversized Pulley System Cage - Compatible with Shimano Dura-Ace R9100 Ultegra R8000 - Sealed Bearings by kcnc
- **How much does it cost?** ₪526 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/110054741-ospw-oversized-pulley-system-cage-compatible-with-shimano-dura-ace)

## Best For

- kcnc enthusiasts

## Why This Product

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

## Key Features

- • **Durable Design:** Narrow wide tooth profile ensures durable chain retention and longevity.
- • **Lightweight Power:** Weighs only 60 grams while delivering significant energy savings.
- • **Friction Reduction:** Experience a 45% reduction in pulley friction for optimized performance.
- • **Maximize Your Ride:** Upgrade your drivetrain for ultimate efficiency and superior performance.
- • **Compatibility Champion:** Works seamlessly with Shimano Ultegra R8000/Dura Ace R9100.

## Overview

The KCNC Road Cyclocross Bicycle OSPW Oversized Derailleur Pulley Wheel System is engineered for Shimano R9100/R8000, featuring a 12t top and 16t bottom pulley. This system reduces friction by 45% and offers power savings of 30-60%, ensuring a more efficient ride. Made from durable 7075 alloy, it boasts a lightweight design and is compatible with high-performance Shimano models.

## Description

KCNC Road Cyclocross Bicycle Bike OSPW Oversized Derailleur Pulley Wheel System for Shimano R9100/R8000 use 12t top+16t Bottom Pulley in Black/Red/Gold Colors

## Features

- WHY USING OVERSIZED PULLEY WHEEL CAGE-Upgrade your drivetrain for ultimate efficiency and superior performance.KCNC Wheel Bearings reduce friction, which gives you a lower rolling resistance.Upgrading your wheel bearings to oversized pulley will maximize the return you get from your energy.
- THE EFFICIENCY OF OSPW-The Oversized Pully Wheel(OSPW) system reduces friction in the pulleys by 45 % and for your optimised performance.The overall power savings of the OSPW System reach 30%-60%, or more in some cases, over a stock setup.
- NARROW WIDE PULLEY&DURABLE CHAIN RETENTION-The OSPW for Shimano features a narrow wide tooth profile to ensure durable chain retention.The system consists of Top 12t & Bottom 16t alloy pulley wheels fitted with low friction bearings and a lightweight cage made from 7075 Alloy.Coated bearings prolong the lifetime even further.The oversized pulley wheels have 3-5 times longer lifetime than the commonly used standard pulleys on the market.
- COMPATIBILITY-The OSPW system is compatible with Shimano Ultegra R8000/Dura Ace R9100.The Oversized Pulley Wheels System has been proven to be the fastest pulley system in the world, providing energy savings starting from 2.4 watts.Almost have the same efficiency ratio with Ceramicspeed.
- SPECIFICATION-Top Pully :12T with sealed bearing / Bottom Pully :16T with sealed bearing / Matiral : AL7075 Fully CNC/ Color:Black,Red,Gold available / Weight : approx.60grams / For Shimano Ultegra R8000/Dura Ace R9100 use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Teeth | 28 |
| Manufacturer | KCNC |
| UPC | 717526062923 |
| Item Package Dimensions L x W x H | 6.97 x 4.45 x 2.01 inches |
| Package Weight | 0.13 Kilograms |
| Brand Name | KCNC |
| Part Number | KCNC OSPW kit for shimano R9100 |

## Product Details

- **Brand:** KCNC
- **Color:** black
- **Material:** Metal
- **Item Weight:** 60 Grams
- **Mounting Type:** Braze-On Mount

## Images

![OSPW Oversized Pulley System Cage - Compatible with Shimano Dura-Ace R9100 Ultegra R8000 - Sealed Bearings - Image 1](https://m.media-amazon.com/images/I/61STWfSkfQL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Awesome product!
  

*by D***H on Reviewed in the United States on December 23, 2021*

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    Having watched videos about watts gained, racing, etc, etc, I was thinking this item was not for me because I am an enthusiast who loves to ride.  I would recommend this OSPW; besides making my bike look amazing, its also feels smooth.  It feels like its a half gear easier.  It makes my rides more enjoyable.  Easy installation with my Ultegra groupset, fit and finish is great.  I have OSPWs on both my bikes.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    It's okay
  

*by O***G on Reviewed in the United States on May 5, 2022*

Am new to cycling my friends talk about this so I got it it's been like 3 ride I have done with it I don't know or can't say if this makes a difference but it looks good on the bike

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    A good replacement
  

*by M***I on Reviewed in the United States on July 11, 2024*

I replaced my stock crank shift with this one, my rear derailleur is shimano ultegra R8000 and it works fine. Please note that bearing is not ceramic bearings

## Frequently Bought Together

- KCNC Road Cyclocross Bicycle Bike OSPW Oversized Derailleur Pulley Wheel System for Shimano R9100/R8000 use 12t top+16t Bottom Pulley in Black/Red/Gold Colors
- KMC X11 Chain 11-Speed SL-Series | Mountain Bike/Road/Gravel | Shimano, SRAM, Campagnolo Compatible | Missing Link Included | Silver

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**Shop now:** [https://www.desertcart.co.il/products/110054741-ospw-oversized-pulley-system-cage-compatible-with-shimano-dura-ace](https://www.desertcart.co.il/products/110054741-ospw-oversized-pulley-system-cage-compatible-with-shimano-dura-ace)

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-02-28*