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does the speed increase when you change assist level from 1 to 2 then to 3? I would check the battery voltage too for peace of mind. Did you buy the battery from bmsbattery?

in this video, the guy said that your battery has 37V while the competition has 36V. That shows how expert his opinion is. Did you pay for the video?

It's our fault really to be willing to pay more for a more powerful motor, forcing manufacturers toward a dodgy interprepation of EN15194 which gives conforming e-bikes their road legal pedelec status.

Your guys can't do the maths. There are various losses from the battery to real life speed. If your motor pullls only 16A, that's equilavent to most EN15194 bikes out there, you'd only get to 26mph with a helping wind, 21mph is likely. It is generally accepted that 250W are needed for 25kph in...

P = V * I is only true in special circumstances eg when the load is a resistor. It is not true in cases of motor, whose real output depends on its Q factor, switching control, load etc. This is because a motor gets pushed around its axle by solenoids, whose voltage across their terminals varies...

on the contrary, the specification takes into account heat loss and friction loss. If the manufacturer specifies 250W continuous power, the motor should run perfectly at that power for its entire life expectancy - typically 20,000 miles + for e-bike motor.

It's usually known as RMS, the maximum real world power rating within safety margins as specified by manufacturer. With e-bikes, you also need to have an excellent battery & controller to reach the maximum output of the motor. it's measured by a dynamometer like this one: Inertia dynamometer...

would you trust a guy who said that his battery is 37V, a lot of other bikes have only 36V? So the optibike has the battery enclosed inside the same box with the motor. Big deal. The price tag is ridiculous. The SRAM X-7 derailleur says how much this bike should sell for.

the Bosch drive system lends to all these bikes a lot of 'German engineering' quality and perceived value. Chinese crank drives may beat the Bosch unit on power but are nowhere as well made or refined. As soon as they move away from crank drive to a a hub (like in the KTM eRace 650P for...

LBS = local bike shop or mobile bike mechanics, they charge about £30-£35 per hour or pay a friend with beer. Here is a video: http://www.youtube.com/watch?v=irmyv9G9WyU http://www.youtube.com/watch?v=irmyv9G9WyU

For about £700 budget, you could ask the LBS to fit an 8-Fun BBS01 kit to your bike for you. Whipping out the BB, fit the motor, brake handles and a seat post or bottle battery should take about 2 hours for someone doing it the first time.

I would have thought that traffic lights encourage drivers to be more careful. If we have a sign that says 'beware of cyclists' placed somewhere in drivers' line of sight just before the turn, that would get them to look down and check their left wing mirror. I have not seen the video but I...

restrict left turning to junctions with traffic lights.

I understand your logic now but it's boring and we still don't know which bike is the current Best Value German Bike Electric Bike.

The gist of this statement is: if you, the customer, buy a Chinese bike, you can expect the importer to have all the parts and all the tools for servicing but not if you buy a German bike? Totally illogical.

yes, you are right, the picture is wrong. Shimano takes aim at Bosch with e-bike drivetrain | Bicycle Retailer and Industry News to read more about this: Shimano takes aim at Bosch with e-bike drivetrain | Bicycle Retailer and Industry News

front hub motor for 2014? how boring... PS: the 50NM torque spec may redeem it a little bit.

On post #38, Electrifying Cycles said: Also, check this link: http://companycheck.co.uk/company/06549037/FLI-DISTRIBUTION-LIMITED/financial-accounts#company-accounts

That is an unsupported generalisation. My LBS sells e-bikes and does not care where I got my bike from whenever I pop in at his shop for advice on something. Rose customers are happy with the efficient service they receive directly from the manufacturers. May be you try to justify that you sell...

there is however, a difference between type-A motor and type-C motor/kit. Type C has Ansmann name and logo everywhere, type A does not.