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I've read that TSDZ2 (also konown as SFM DU 250) has a build-in controller and there are some positive opinions about this kit but very few. So I wonder if someone has this engine and can write how it works?

This is my bike: http://www.bikekatalog.pl/2009/rowery/1836/Arkus.Classic.1100/ - I plan to buy Shimano brakes, better tyres (maybe Schwalbe Energizer?) and chain. Link to engine: http://www.btn-ebike.com/mod_product-view-p_id-190.html My weight: 71 kg. I have tested an e-bike with 8Fun...

I plan to purchase an electric motor and convert my bike (mainly commuting to work in the city). There are some slight elevations in my area and I would like to cycling about 20-25 km/h. I consider buying a TSDZ2 kit from www.btn-ebike.com. But I don't have possibility to do test. it seems to be...