Swytch Electric Bike Conversion Kit for Brompton

The Swytch electric bike conversion kit transforms a Brompton folding bicycle into an electric-assisted commuter without replacing the frame or changing the core design. Brompton's British-made steel frames are compact and durable, built around a lateral fold that keeps the bike portable and suitable for mixing cycling with public transport. The 16-inch wheel size is standard across the Brompton range, which means the conversion kit is tailored to work with the bike's geometry and proportions.

This kit is designed for riders who already own a Brompton and want electric assistance without buying a new bike. The hub gear system on most Bromptons means shifting is straightforward and maintenance-free, and the conversion works with this existing setup. The motor integrates into the wheel, so the fundamental character of the bike—its quick fold, light weight, and manoeuvrability in traffic—remains intact. You still get the same riding position and handling that makes Bromptons effective in urban environments, but with the option to take hills or headwinds with less effort.

The conversion is suited to commuters who find themselves occasionally tired after climbing hills on their Brompton, or who want to arrive less sweaty on hot days. It also works well for riders who combine cycling with longer public transport journeys and want less physical strain when they do ride. Because the Brompton fold is unchanged, the bike still stows easily on trains or in small flats, making it practical for multi-modal commuting. This kit keeps the appeal of Brompton ownership—portability and British engineering—while adding electric range and assist to your existing bike.