The bicycle specialist BBF is an importer of the well-known folding bike brand Dahon, but also produces its own bikes. The latest addition is a folding e-bike called Stail. It rolls on 20-inch wheels, has an aluminium frame and, depending on the configuration, a 20- or 22-speed derailleur system from Shimano. The auxiliary drive is a 250-watt electric motor from Ansmann, which is integrated into the rear wheel hub and pushes along at speeds of up to 25 km/h if required.
The motor draws its energy from a 36-volt lithium-ion battery, which sits between the rear wheel and frame and can be easily removed. Depending on the assistance setting and the speed ridden, one battery charge should last for tours of up to 60 kilometres. It should take four to five hours on shore power to recharge the 225 watt-hour battery.
As is usual with many bikes, the Stail is folded using a frame hinge and by folding the steering tube, and the handlebars can also be adjusted in height. The pack size is stated as 86 x 43 x 63 centimetres. This means that it takes up a little more space than the standard 20-inch folding bikes, but it is very compact for an e-bike.
The stated weight of 16 kilograms is comparatively light for a bike with electric assistance. The weight applies to the basic version with 20-speed gears, no lights and no mudguards, which costs just under 2000 euros. A complete set of equipment that complies with road traffic regulations is available for around 100 euros extra. The 22-speed version with 105 gears from Shimano will cost 2250 euros. The Stail will be available from specialist dealers from February this year.
Further information on the Product page.
Hauke Schmidt
Test & Technology editor
