BROMPTON X CHPT3 4TH EDITION
The Brompton x CHPT3 4th Edition folding bike. A minimalist P Line, packed with high-performance details.
We selected proven performance modifications such as titanium forks and rear triangle, assembled for speed without loss of comfort. The gearing is chosen to cover all bases, from quick sprints and sustained speed to steep climbs. All contact points between you and the bike, and the bike and the road deliver lightness, performance and comfort. We’ve even sourced light weight inner tubes, which means you can focus on avoiding the shortest route to reach your destination.
The 4th Edition
Turning a new page in the Brompton and CHPT3 story, the latest collaboration brings a fresh dynamic to a proven partnership. One founded on fun, practicality, and high performance.
Drawing on our previous three collaborations with David Millar of CHPT3, we turn to page 4, and the horizon broadens. A bike that originated as a city commuter and became a daily workhorse for David, a former pro-cyclist, is now embraced by a community who see beyond simply departing from point A and arriving at point B.
To own a Brompton x CHPT3 is to belong to a community of like-minded riders from Indonesia to Indianapolis, a community that is powered by new members like you.
Made for speed
Handbuilt titanium and steel frame. All the practicality of a Brompton in a lightweight and performance oriented form. More than 1.5kg lighter than the original bike.
A fast and light wheelset
Designed and tested to stand up to daily use in the city, in all weathers. On superb tan-walled Schwalbe One tyres for optimal grip and maximum style. With weight-saving Tubilito innertubes.
Superlight, compact gearing system
The Brompton 4-speed system* for rapid urban acceleration and nimble climbing ability. With a 60-gram derailleur, meticulously engineered to fit inside the narrow fold.
fi’zi:k Terra Argo X5 saddle
We chose this gravel-specific saddle for the superb vibration absorption, and the short nose. This gives you a stable, planted position. You can shift further forward too– the ergonomic design minimises pressure on any sensitive parts. Cleverly thought-out drainage channels make it brilliant for wet-weather riding.
Brompton x CHPT3 Frame Pouch
Your CHPT3 comes with a limited-edition Frame Pouch Bag. It’s inspired by how the community use their Brompton x CHPT3 bikes - moving fast around the city, racing, heading out on long weekend rides. It’s perfectly sized for a spare tube and tools. Just like the bike, it’s minimalist, practical and brilliantly durable. In abrasion resistant Hypalon fabric with a welded, waterproof construction.
CHPT3 Collaboration History
Due to supply-chain issues, Specs are subject to change without notice.
|Edition||Brompton x CHPT3 4th Edition|
|Main Frame||Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed joints|
|Rear Frame||Superlight Advance rear frame made from Titanium with a replaceable hanger. Redesigned suspension block and new 54mm roller wheels|
|Fork||Superlight Titanium fork with a threaded headset|
|Folded Size||645mm (H) x 585mm (W) x 270mm (D) (25.3'' x 23'' x 10.6'')|
|Saddle||FizikTerra Argo Saddle - A short nose saddle with a ride-compliant carbon-reinforced nylon shell and S-Alloy rails. The saddle absorbs road chatter and vibrations, delivering the comfort needed for long distance riding|
|Seatpost||Brompton Chromoly steel tube - gloss black|
|Grips||Ergon GE1 Evo Slim – A premium ergonomic, rider-oriented grip with more comfort, precision and performance|
|Colour||High-shine Gloss Winter Sky and textured Concrete Grey with Fire Red and Aqua Teal accents|
|Pedals||Brompton Folding left hand and non-folding right-hand pedals|
|Rear Wheel||Superlight 4 speed rear wheel. Lightweight rim, double-butted spokes and aluminium hub body with sealed bearings. Newly developed 4 speed freehub body and hex key axle|
|Hinge Clamps||Machined aluminium hinge clamp levers and plates anodised matt black finish|
|Tyres||Schwalbe One Tanwall - Developed specifically for the CHPT3 bike with class leading grip, weight and rolling speed|
|Bottom Bracket||Square taper bottom bracket|
|Chainset||6061 forged aluminium crank with 50T chainring and integrated chainguard|
|Derailleur||Patent-pending direct mount 4 speed derailleur|
|Speed||Brompton 4 speed rear wheel?|
|Drivetrain||Brompton 4 speed drivetrain, 163% range|
|Shifters||Brompton 4 speed trigger shifter|
|Chain||Hollow pin Superlight Advance Chain|
|Chain Tensioner||Advance chain tensioner with replaceable hanger mounting|
|Brakes||Dual Pivot Calipers|
|Frame Pouch Bag||Each bike comes with a limited-edition CHPT3 x Brompton Frame Pouch Bag. The frame pouch bag has been designed to fit securely inside the triangle on the bikes' mainframe. Perfect for storing a spare innertube (included) plus a multi-tool and tyre levers for essential road side repairs. Simple flap closure to the main compartment and secures via a Velcrostrap. Externally it features a grippy printed surface and Brompton logo; both in CHPT3 Fire Red. It’s made from a highly durable Hypalon material in a waterproof welded construction that will repel whatever the elements can throw at it|
* Subject to change without notice.
Brompton x CHPT3: The 4th Edition, New York
CHPT3 founder David Millar discovers a mobile community within the maze of Brooklyn streets and alleyways that the Knight Ryders call their playground. A movement of like-minded friends whose bikes are more than bikes and journeys are more than journeys welcome and guide him through their paved and potholed territory. Riding through the darkness, David feels the lightness and warmth of the group’s spirit. This former professional cyclist witnesses a team not created by contracts and driven by performance but by a common humanity and the sheer joy that riding a bicycle with friends can bring. The CHPT3 Brompton is a perfect fit within this environment and demonstrates why this special bike is embraced by so many urban cyclists around the world. #BromptonChpt3