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I am saying don't buy them. You are better off saving for a good Lithium ion battery, something like this one: http://eclipsebikes.com/145ah-lithium-frame-battery-samsung-cells-p-1104.html it's much better match for your BBS01 kit. That battery comes with the correct charger. If you need to...

I am not heavy and can just about climb 20% gradient with the Krieger on first gear with pedalling. The motor on the Krieger is as powerful as the Big Bear, both are powered by the same eletronics (20A Lishui LS947), the use of the gears gives the Krieger just that bit extra where you can choose...

I hate those fat bikes with rigid forks. They look the business but the ride is horrid.

You also need to buy the right charger for your battery. Chargers for SLAs and chargers for Lithium ion batteries are not interchangeable. You plug the charger to the output port of the inverter, plug the inverter to the cigarette socket. Charger for SLA...

I like bike shops with a 'see through' workshop area, easy to see how your mechanics treat the bikes.

charge it from your car battery with an inverter like this one: http://www.ebay.co.uk/itm/NEW-500W-Converter-Modified-Wave-Power-Inverter-DC-12v-to-AC-220v-Invertor-UK-/131184757449

very good for up to about 12% gradient. The crank driven Krieger climbs a bit better.

those blades you see are the hall wires. They fit into a 6-way AMP plug like this one: red and black are power, yello green and blue are signals.

there is enough space between the motor housing and the bottom bracket for your gear cables but not much more.

The problematic skewer is here: You can see it can malfunction unless you tape that lever to the fork.

depending on the actual controller you use, the capacitance can vary between 0.1 Farad to as much as 1F. There is a tool to calculate the appropriate value of the precharge resistor here: http://scriptasylum.com/rc_speed/nospark.html Assuming 0.1F capacitance and 20S, I think the appropriate...

switch off the electrics, put the plug back in, you get your 20S. why do you need to precharge?

The Krieger is introduced last October I think, it sold out last month, woosh expect a new batch arriving in a couple of weeks but my source says that the whole batch arriving in May is already all reserved, another batch will arrive in June.

I can only give details on the bikes that I actually have ridden.

yes. You are right on this one. I still think it's cheaper and and less aggro to get a new controller from bmsbattery.com than going to Court. The average person would find litigation quite stressful.

yes, crank drive can damage the gears and REAR hub drive can break spokes but you can always take measure to stop both: blip the brakes slightly before changing gear on crank drive and learn to true the wheels. Cost to replace the chain: £10, derailleur: £10, spokes: a couple of quid, these...

the zephyr-cdn weighs 21kgs all in, the average 20" folder (like the Gale) is 10% heavier, weighs about 23kgs. You won't find a better power/weight ratio.

the zephyr-cdn is a light and fast 20 inch folder with front and rear suspension, crank drive and hidden battery: http://wooshbikes.co.uk/?zephyr-cdn

the zephyr-cdn is pleasant to ride and light. http://wooshbikes.co.uk/?zephyr-cdn

if I were the OP, I'd take the seller to Court although the gumtree ad did not have any return policy. The first step is to obtain the guy's address to serve the claim. Ebay can't give it to the OP because he did not buy it on ebay, I wonder how you'd get his address?