David Millar riding a Brompton x CHPT3 bike downhill David Millar riding a Brompton x CHPT3 bike downhill

Brompton x CHPT 3

Designed in collaboration with CHPT3, a brand established by ex-pro cyclist David Millar. A Brompton that a die-hard roadie would consider. Unique and custom built for CHPT3. Stylish, fast and guaranteed to stand out in any city.​



In 2015, David Millar met with Brompton CEO Will Butler-Adams. David expressed he rarely used a bike in the city, only for training and competing…​
Brompton x CHPT3 History


2016 saw the first prototype of the Brompton x CHPT3 come to life. David had been using a series of different Bromptons the previous year, working out through trial and error the spec required for the CHPT3 version.
A man cooling off with water on his head with a Brompton x CHPT3 leaning behind him


2017 saw the CHPT3 Brompton development continue. Production was scheduled for the end of the year. Titanium parts were being stockpiled at the new factory in London and Scwhalbe worked on producing the tan wall tyres that would match David’s racing bikes…
A black and white photograph of David Millar overlooking a bridge on his CHPT3 Brompton bike

2018 Edition

2018 saw the first Brompton x CHPT3 special editions come off the factory line. Initially limited to 500 bikes, it soon became clear that demand would exceed supply.
The product shot of the Brompton CHPT3 2018 Edition
A red edited photograph of the Herne Hill Velodrome on 14 June 2018 with graphic text "The race was insane" A red edited photograph of the Herne Hill Velodrome on 14 June 2018 with graphic text "The race was insane"

"This is a total game-changer!"

David and Ned were no longer the only people at the Tour de France with Brompton x CHPT3 bikes. Others realised it was the best way to find some play in your work while on the road for three weeks. Equally at home on the roads of the Tour de France or the daily commute to work, the CHPT3 introduced a whole new type of cyclist to the Brompton way of life.
An image collage of different cyclists riding the Brompton CHPT3 bikes

2019 Edition

2019 saw the launch of the second version of the bike. An evolution rather than a revolution, the concept remained the same with the details refined and improved. The Brooks saddle and Ergon grips were replaced by industry leading British fabric. The Schwalbe ONE tyres were developed especially for the Brompton x CHPT3 2019. The tan-wall, with 35mm width, lowers rolling resistance and uses extremely cut-resistant high tech fibre - maintaining a high level of puncture resistance. The rear suspension block is race-tuned, offering a stiffer and more responsive ride which allows for improved handling. The fire red front tube is complimented by a textured black main frame as well as titanium forks and rear triangle.
A product image of the Brompton x CHPT3 2019 Edition

2020 Edition

2020 sees the launch of the newly updated Brompton x CHPT3. What started out as a one-off experiment to merge some roadie ideas into a folding bike has morphed into a long-term relationship, with each team bringing new thinking to how the collaboration can evolve further in its third chapter.
Andrew Finkell testing the saddle of a Brompton x CHPT3 2020 edition bike

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