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Brompton Service & Repair
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If you own a Brompton bicycle, you already know how precisely it is designed to work around its trademark compact fold. Tuning and repairing Bromptons requires a high level of expertise, and keen sensitivity to its unique design and specificity of the parts. 

There are not many shops that sell Bromptons in Chicago, and none that have the level and depth of experience our mechanics have with repairing Bromptons. Cosmic Bikes mechanics have worked on hundreds of Bromptons, both new and old, and are familiar with typical problems that arise, and skilled at addressing more unusual issues as well.


Available Services

Below is a list of services we perform on Bromptons. If there’s something you don’t see listed, there’s a good chance we can accommodate it. Please give us a call!

  • Complete tune-up services using original Brompton replacement parts and cables

  • Flat tire repair using genuine Schwalbe inner tubes and tires

  • Precise gearing adjustments to ensure smooth and accurate shifting and eliminate cable slippage

  • Complete brake work for secure, dependable stopping

  • Drivetrain cleaning, service and replacement, including gearing up or down using genuine Brompton parts

  • Headset and bottom-bracket replacement

  • Brompton fender, rack and roller or EZ Wheels installations

  • Brompton handlebar conversions (allow time for ordering color-matched parts)

  • Rear triangle and fork replacement (allow time for ordering color-matched parts)

  • Brompton gearing conversions (3 to 6sp, 2 to 6sp, etc)

  • Conversion to integrated lighting

  • Upgrading older Bromptons with current components

  • Hinge pin overhaul/replacement using proprietary Brompton tools and parts

  • Seat post tube reaming and bushing replacement using proprietary Brompton tools and parts

  • Crash assessments & rebuilds

  • Custom wheel builds using aftermarket parts*

  • Custom drivetrain installations*

*Modifications using non-original parts may affect the Brompton warranty, as specified in your Brompton Owners Manual.