---
product_id: 7885741
title: "BBR Tuning Performance Spring Idler Pully Upgrade"
brand: "speed demon"
price: "HK$271"
currency: HKD
in_stock: true
reviews_count: 8
url: https://www.desertcart.hk/products/7885741-bbr-tuning-performance-spring-idler-pully-upgrade
store_origin: HK
region: Hong Kong
---

# Easy Installation Heavy Duty Spring Universal Fit BBR Tuning Performance Spring Idler Pully Upgrade

**Brand:** speed demon
**Price:** HK$271
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Upgrade Your Ride, Elevate Your Game!

## Quick Answers

- **What is this?** BBR Tuning Performance Spring Idler Pully Upgrade by speed demon
- **How much does it cost?** HK$271 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/7885741-bbr-tuning-performance-spring-idler-pully-upgrade)

## Best For

- speed demon enthusiasts

## Why This Product

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

## Key Features

- • **Durable Design:** Thicker steel bracket ensures longevity and reduces chain stress.
- • **Quick Installation:** Swap out your old pulley in minutes—no special tools required!
- • **No More Adjustments:** Experience hassle-free maintenance with a self-adjusting spring mechanism.
- • **Enhanced Performance:** Maintain optimal chain tension for a smoother ride and extended chain life.
- • **Universal Compatibility:** Fits a wide range of motorized bicycles and standard bikes.

## Overview

The BBR Tuning Performance Spring Idler Pulley Upgrade is designed for effortless maintenance and enhanced performance. Featuring a heavy-duty spring for constant chain tension, this pulley eliminates the need for frequent adjustments. Its robust steel construction ensures durability, while its universal fit makes it compatible with various motorized and standard bicycles. Installation is a breeze, allowing you to focus on the ride rather than the repairs.

## Description

BBR Tuning Performance Spring Idler Pully Upgrade

## Features

- NO ADJUSTMENTS NEEDED: The BBR Tuning Spring Idler Pulley features a heavy duty spring to keep constant chain tension. No longer do you have to keep adjusting your idler to compensate for your chain stretching out.
- HEAVY DUTY SUPPORT: With a heavy duty spring, your chain is locked in place offering better alignment and constant tension. The bracket is thicker steel and a more sturdy design so that your chain is less stressed and can drastically extend the life of your chain.
- EASY INSTALATION: Just unbolt and remove your older idler pulley and bolt your new. No adjusting tension as the spring will keep it perfectly adjusted every time.
- UNIVERSAL FIT: Compatible with 415 heavy duty bicycle engine chains, regular and spring chain tensioner. Works for both 2 stroke and 4 stroke motorized bicycle engines and most standard city bikes, cruisers bikes, beach cruisers, mountain bikes and road bikes.
- INCLUDED COMPONENTS: 1x BBR Tuning Spring Idler Pulley, 1x Mounting Hardware

## Images

![BBR Tuning Performance Spring Idler Pully Upgrade - Image 1](https://m.media-amazon.com/images/I/51vQhx9n4tL.jpg)
![BBR Tuning Performance Spring Idler Pully Upgrade - Image 2](https://m.media-amazon.com/images/I/41AIl1dWs8L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Read this if you are considering this product or if you are having trouble with it!
  

*by N***T on Reviewed in the United States 🇺🇸 on July 1, 2018*

First off(stay tuned, i talk about how to make it work if you have problems), i want to say that i love this spring tensioner. It works beautifully, all problems that i've been having with the default tensioner are gone completely. I never have to adjust my tensioner anymore because if there is a big bump, the spring goes to work instead of the tensioner bending in weird ways.Now, if you are having problems with the spring tensioner catching the chain once you try to start the engine(causing you to skid to a hault) you are putting it on wrong. Do not put it on how they do in the image because the spring is way to weak to handle the forces without making the pully go down too far and catch the bolt connecting the pivotting bar.What you need to do is put the tensioner on the other way. The pully should be towards the engine, with the spring towards the sprocket on the back wheel. This way, once you peddle up to speed and release the clutch, the chain and pully have nothing in the way and can go down as much as it needs, and the engine starts. After i did this, i've never had problems starting the engine and the chain never gets caught anywhere.You might need to cut the chain down to do this though. I would also make sure that the spring has some tension when you put the chain on. This way, there will be no slack in the chain, the slack for bumps is provided by the rest of the spring.

### ⭐⭐⭐⭐ 







  
  
    Usable but I had to make improvements
  

*by A***R on Reviewed in the United States 🇺🇸 on February 29, 2016*

I had two problems with this spring tensioner one of which was that the bolt behind the pulley will stick out too far. My chain got wrapped around it and rounded it off. My solution was to make my own more narrow bolt. Second was when I would pop the clutch to start the motor it would put so much force on the spring that it would pull the tensioner back too far & once threw off my chain. I fabricated a sheet of stainless steel to catch the pulley arm only letting it back enough to let some tension out of the chain. My overall review is that this tensioner is usable but in my case I had to make it work, it wasn't just a bolt on and be done with it kind of deal. Note that my bicycle is a Schwinn Stingray frame so my problems may only be unique to my setup

### ⭐⭐⭐⭐ 







  
  
    Instructions missing, Allen bolt head interferes slightly.
  

*by C***6 on Reviewed in the United States 🇺🇸 on May 29, 2019*

No instructions but simple enough to get on even with trial and error. Was sketchy about the arm being mounted in a slot rather than a hole due to issues with the one that came stock with my engine, bit got it nice and tight. And the arm still moves with ease. Mounting on the bottom instead of the top causes a slight issue with the chain clipping the bolt head on the roller, but an easy fix with a new bolt. All in all great product so far!

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**Shop now:** [https://www.desertcart.hk/products/7885741-bbr-tuning-performance-spring-idler-pully-upgrade](https://www.desertcart.hk/products/7885741-bbr-tuning-performance-spring-idler-pully-upgrade)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-22*