Brompton P Line CHPT3 V4 Limited Edition Folding Bike

The Brompton P Line CHPT3 V4 is a limited-edition British folding bike that strips the Brompton formula down to its essentials for speed and weight savings. This is the final iteration of the CHPT3 collaboration, making it a collectors' piece for anyone serious about compact urban cycling. The frame combines hand-brazed steel tubing on the main frame with titanium on the rear stays and fork, resulting in a bike that's more than 1.5kg lighter than a standard Brompton without sacrificing the practical fold that makes these bikes so appealing for mixed-mode commuting.

The 4-speed gearing system uses Brompton's trigger shifter and a direct-mount derailleur that weighs just 60 grams, engineered to fit neatly inside the fold. The cassette ranges from 11 to 18 teeth, giving a 163% spread suited to rapid urban acceleration and climbing without the weight penalty of more gears. The wheelset is built around superlight rims with double-butted spokes and sealed bearing hubs, shod with Schwalbe One tyres in that distinctive tan wall finish. Tubolito lightweight inner tubes keep rolling weight down further. Brompton's dual-pivot callipers provide reliable stopping power, whilst the Fizik Terra Argo saddle and Ergon grips are chosen for comfort on short, punchy rides rather than long distance touring.

The bike folds to 645mm high by 565mm wide by 270mm deep, the same compact footprint as any Brompton, though the lighter weight makes carrying it up stairs or onto a train noticeably easier. The low, flat handlebar gives a sportier, more performance-oriented riding position than standard Brompton bars, and the frame pouch bag included with the bike provides somewhere to stash a spare tube, multi-tool and tyre levers. Made from waterproof Hypalon with welded construction, the pouch is finished in CHPT3 Fire Red and sits neatly in the frame triangle.

This version is best suited to urban riders who want the practicality of a folding bike but value lightweight performance and aesthetics. The lighter weight makes a tangible difference when folding and unfolding regularly, and the titanium rear frame and fork keep the ride quality smooth despite the reduced heft. If you're mixing cycling with public transport, storing a bike in a small space, or simply want a Brompton that rides a bit more lively than standard, this CHPT3 V4 delivers that in spades.