Karl, looks like you have just enough time to make a leisure battery design
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i've emailed them regarding the brakes, could not see any levers, stopping could be an issue geting your foot down quick enough if you cut up.
range is suggested at 10 miles with peddling, and a spare battery available for £50 so 20 miles. be a great bit of kit for weekend or vacation use, not sue how anyone is going to transport it, if they don't have a trailer or van? hardly going to fit on a bike rack
i'd guess there is a folding peg each side for parking, as it's classed as bicycle i'd think you can park it nearly anywhere you like, as long as it don't say 'no bikes' i'd assume?
i'd think it will be likely be affected by cross winds, but would many take it out in those conditions?
Karl, another thought, how about designing some snow chains - and will the new metal gearbox fit
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Alan