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if there is a plug like this about 10 inches from your motor, you can buy a compatible motorwheel and get a bit extra power.

it has an LCD, that's a good indication that the controller may be beefy enough. Next point to check is the motor cable. Unplug it and post a picture.

if you want to run your lights from the battery, you will have to run wires from the controller to the lights. At places, the wires are exposed and can get easily snagged. In some cases, damaged wires can damage your LCD or controller. That's why most lights have AAA batteries. weight: there is...

yes, there is. Maximum efficiency is around 80% of maximum rpm. You select the right gear where you feel most comfortable pedaling then stick to 60-70 rpm.

DH, you are not wrong, almost all bikes fitted with cadence sensors have good controllers nowadays.

wait until you taste Peruvian chocolate: http://www.sainsburys.co.uk/webapp/wcs/stores/servlet/gb/groceries/sainsburys-peruvian-dark-chocolate--taste-the-difference-100g yum!!

d8veh is correct, my mistake. Maximum torque is at zero RPM and peak power is at 65% of maximum rpm, around 45-55 rpm. You go uphill fastest if you keep your cadence to 45-55 rpm, you have maximum assistance but that does not equal to having maximum torque. You have maximum torque when you stall.

you will see E06 on the LCD, that's low battery voltage.

I guess so too, but could not find a technical manual on the internet. Maybe a Bosch dealer can clarify this for us.

I secretly support forced science education and 'work until you drop' policy. http://www.bbc.co.uk/programmes/b06565zm

that's easy, maximum torque is at around 60% of maximum RPM, about 45-55 RPM. I don't know the reduction on the Bosch system but expect it to be similar to Chinese CD motors, it's 15 on Bafang BBS01, 20 on the woosh Krieger.

flecc, 30 millions people pay income tax to support the rest, that's why there is not much money to meet the demands. My contention is, 80% of people who need help arrive to this position not from birth but later in life, so policies can greatly reduce the burden on future generations.

Yes, that's mostly correct. If you test your power consumption at gear 4,5,6,7,8,9, I doubt that you'll find much difference at the same speed. If you look at the plot of efficiency vs RPM (source http://www.ebikes.ca/tools/simulator.html ), the efficiency rises rapidly with RPM, reaching a...

highest income tax rates in Sweden (51%) and in Norway (55%) are not a million miles away compared to ours. What saves their welfare system is the cold weather, smaller population and better education. For example, there are 9.4 millions people with some disability in the UK against Sweden 1.5...

crank drives efficiency does not vary much with RPM. What happens is power = torque * angular velocity, the torque you can get drops when the RPM goes up. the motor's power is limited by the controller, for a Bosch, that's 17A-20A or about 600W to 750W depending on programming.

how about a culture that says it's OK to smoke, drink and take drugs then offload the consequences onto taxpayers?

and take their mobile phones away until they cough up the cash.

it's not sufficient to change just the motor to 500W. You may need to upgrade the controller as well. open the controller box and post a picture of the label.

Tillson, the GDP figures from OECD and the World Bank show that UK GDP grew about 700 billion dollars over the last 5 years, roughly 23%. That can't be achieved by an ageing population alone. Germany can't grow that fast without millions of immigrants either. The increase in GDP means that the...

the motor is a 2kw direct drive. It has a 15mph mode but is illegal on public roads. I don't know how true their slogan 'Rock your day' is, 2kw is usually not enough for 38mph, but you can easily experience 38mph with any bike going slightly downhill.