He Needed a Bike For His Rescue Dogs—So I Built One!

Quick Overview

The creator successfully converted a Surly Timberjack mountain bike into a single-speed commuter e-bike, overcoming challenges with component compatibility and installation to create a functional and practical electric bicycle.

Key Points: The project involved converting a Surly Timberjack mountain bike into a single-speed e-bike suitable for commuting and towing. The conversion utilized a Bafang BBS02 mid-drive motor kit, an 11-speed cassette, and a 48V 10.5Ah battery. Challenges included the motor's BCD not being compatible with the stock chainring, requiring a custom adapter and a different chainring. The original handlebars were too narrow for the e-bike components, necessitating a handlebar swap. The bike's existing suspension fork was retained, providing comfort and capability for varied terrain. After the conversion, the bike weighed 40 lbs 2 oz (18.2 kg) and performed well in testing, achieving speeds of up to 20 mph with pedal assist.

Context: The video documents a DIY project to transform a standard mountain bike into a more practical electric commuter bike, suitable for everyday use and even light hauling with a trailer. The creator details the challenges and solutions encountered during the build, highlighting the process of integrating an electric mid-drive motor, battery, and associated components.

Detailed Analysis

The creator details the process of converting a Surly Timberjack mountain bike into a single-speed e-bike, emphasizing its suitability for commuting and towing. The build utilizes a Bafang BBS02 mid-drive motor, which required a custom adapter to fit the stock chainring due to BCD incompatibility. The creator also encountered issues with narrow handlebars not accommodating the new e-bike controls, necessitating a handlebar replacement. The project involved installing a 48V 10.5Ah battery, an 11-speed cassette, and various other components to complete the e-bike system. The finished product weighed 40 lbs 2 oz (18.2 kg). Testing revealed the bike could reach speeds of up to 20 mph with pedal assist, demonstrating the effectiveness of the conversion. The creator also addressed minor issues like a broken spoke nipple and the need for a better cable management solution, showcasing a practical approach to problem-solving during the build.