# Why This Bicycle Absolutely NEEDS 2 Chains

Source: https://www.youtube.com/watch?v=NnSWDKfT7FQ
Recap page: https://rapidrecap.app/video/NnSWDKfT7FQ
Generated: 2025-07-15T06:43:43.878+00:00

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## Quick Overview

The Buffalo S2 Utility bicycle features a highly practical and reliable two-speed drivetrain with two heavy-duty chains and separate chainrings/cogs, designed for durability and field serviceability in remote communities, enabling increased productivity and mobility where traditional bikes fail.

**Key Points:**
- The Buffalo S2 Utility bicycle features a practical and reliable two-speed drivetrain with two heavy chains and separate chainrings/cogs.
- This design allows for both cruising and climbing gears, addressing the limitations of single-speed bikes on steep terrain.
- The bicycle is designed for field serviceability with minimal tools, crucial for remote communities without specialized bike shops or online ordering.
- It includes a rear rack rated for 200 pounds, enabling transport of heavy loads like milk, water, medical supplies, and students.
- World Bicycle Relief, a non-profit, developed the Buffalo S2 to mobilize people in underserved communities, creating jobs and doubling productivity for users like dairy farmers.
- The unique two-speed freewheel mechanism, invented by SRAM engineers, is simple, reliable, and cost-effective, winning design awards.
- The bike uses durable aluminum rims and dual-pivot caliper brakes, which are easier to true and service than previous models.

![Screenshot at 0:00: Man standing next to the Buffalo S2 Utility bicycle in a wooded area, highlighting the product.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-00-00.png)

**Context:** The video introduces the Buffalo S2 Utility bicycle, developed by World Bicycle Relief (WBR), a non-profit that provides bicycles to remote communities with limited resources. It highlights the challenges faced by people like Georgina, a dairy farmer in Zambia, who previously struggled to transport milk due to lack of refrigeration and poor road conditions. The Buffalo bike aims to overcome these logistical barriers by offering a robust, easily maintainable, and purpose-built transportation solution.

## Detailed Analysis

The Buffalo S2 Utility bicycle is presented as a highly practical and reliable solution for transportation in remote communities, particularly those lacking infrastructure for complex bicycle repairs. Its core innovation is a two-speed drivetrain featuring two heavy-duty chains, each paired with entirely separate chainrings and cogs. This design allows for both a high gear for cruising and a low gear for climbing, addressing the limitations of single-speed bikes on steep terrain, which previously forced users to push their bikes like carts. The shifting mechanism is counter-intuitive but brilliantly simple: kicking the pedals backward engages or disengages the higher gear, making it more reliable and cost-effective than traditional derailleurs or internal gear hubs. This two-chain system also offers redundancy, allowing the bike to remain functional even if one side fails. The bike is built for durability with heavy-duty tires, abrasion-resistant grips and seats, and a robust rear rack capable of carrying up to 200 pounds. It is designed for field serviceability using minimal tools, a critical feature given the lack of specialized repair shops or access to online parts in many target communities. World Bicycle Relief, the non-profit behind the Buffalo brand, not only distributes these bikes but also trains local mechanics and establishes bike shops, creating jobs and fostering self-reliance. The Buffalo S2 has won prestigious design awards, including the Eurobike Gold Award and the German Design Award, recognizing its innovative engineering tailored for challenging environments. The video emphasizes the bike's impact on livelihoods, education, and health by enabling efficient transport of goods, medical supplies, and students, effectively doubling productivity for users like dairy farmers.

### Buffalo S2 Utility Design & Innovation

- Two-speed drivetrain with two heavy chains and separate chainrings/cogs
- Simple, reliable shifting by kicking pedals back
- Redundant chain system for continued function if one fails
- Designed for field serviceability with minimal tools

### Purpose & Impact in Remote Communities

- Enables transport of heavy loads (milk, water, supplies, students)
- Increases productivity and income for users like dairy farmers
- Mobilizes over 4 million people and creates jobs through local bike shops and mechanics

### Durability & Maintenance Features

- Heavy-duty tires and abrasion-resistant components
- 200-pound rated rear rack
- Box-section aluminum rims for easier truing
- Dual-pivot caliper brakes for reliable stopping and easier servicing

### Development & Recognition

- Developed by World Bicycle Relief (WBR) with engineering support from SRAM
- Won Eurobike Gold Award 2024 and German Design Award Gold 2025 for product engineering

### Included Accessories & Repairability

- Comes with a stamped steel box wrench, air pump, light-duty cable lock, and tire lever
- Includes a specialized freewheel tool for repair/replacement of the two-speed mechanism

### Real-World Application & Benefits

- Allows climbing hills with heavy loads
- Facilitates taxi services (boda-boda) in East Africa
- Supports education by enabling students to reach school

![Screenshot at 0:00: Man standing next to the Buffalo S2 Utility bicycle in a wooded area.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-00-00.png)
![Screenshot at 0:03: Close-up of the bicycle's drivetrain showing two chains and the 'POWERED BY WBR' label.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-00-03.png)
![Screenshot at 0:31: A large milk can being loaded onto the rear rack of a Buffalo bicycle.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-00-31.png)
![Screenshot at 0:58: A heavy plate compactor machine strapped onto the rear rack of the bicycle, demonstrating its 200lb capacity.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-00-58.png)
![Screenshot at 1:36: Man pointing to the two chains on the bicycle's drivetrain, explaining the two-speed system.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-01-36.png)
![Screenshot at 2:47: Exterior shot of a 'BUFFALO BICYCLES' shop with a man pushing two bikes out.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-02-47.png)
![Screenshot at 3:30: Man demonstrating the two-speed shifting mechanism by kicking the pedals backward, showing the chains engaging/disengaging.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-03-30.png)
![Screenshot at 4:39: Graphic showing the Buffalo S2 Utility bicycle with 'EUROBIKE GOLD WINNER AWARD 2024' and 'GERMAN DESIGN AWARD GOLD 2025' badges.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-04-39.png)
![Screenshot at 5:47: A tray of worn-out bicycle gears and parts with a 'KENYA BUILD FAIL MAY/JUNE '22' label, illustrating field testing results.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-05-47.png)
![Screenshot at 10:27: Man working on the upside-down bicycle, demonstrating how to remove the freewheel using a specialized tool.](https://ss.rapidrecap.app/screens/NnSWDKfT7FQ/00-10-27.png)