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may be not but it feels like it does. Your TCM is very much like my BBS01, the faster the motor runs, the higher the yield up to about 75 RPM so the motor produces plenty of power up to that point then it starts to be less productive but somehow, because it sounds sweeter when it runs faster, it...

then the next logical step is swapping the motor wheel.

I reckon the pressure on the teeth is responsible for the wear. Consequently, if presented with a choice between say gear No 5 or No6 on a 5% hill, I tend to choose No5 - the chain runs faster, but less pressure on the sprocket. I believe the choice results in less chain stretch and perhaps...

not so much as breaking but more a case of stretching and wearing. The rear sprockets, especially the smallest sprocket (12 teeth) gets used a lot on flat roads. Average expected lifespan is 1,500 miles for 1% chain stretch. The cost of replacing chain and freewheel is about £15-£20 for Woosh...

yes, it does but chains are cheap and easy to replace. Maybe it's the reason why not many manufacturers put 500W motors on the crank. john f explores the issue in this thread: http://pedelecs.co.uk/forum/threads/how-long-should-my-ebike-chain-last.16779/

can you post a picture of the donor bike? if you are going to put a 3kw powerplant on the bike, then you need a bike strong enough to host it.

I tried googling B&R bike customers reviews - there isn't any other than mentions in the electricbikemag http://www.electricbikemag.co.uk/showStory.php?storynum=130 it could be because the product does not sell in sufficiently large volume.

peak power of the 8-Fun BPM (on the big bear) is about 700W, of the TCM (on the CDL) is about 500W. Both bikes have to be restricted to comply with EN15194. The Big Bear is has more grunt and acceleration. It's not very fast, about 21mph max derestricted. The CDL has higher pedalling speed -...

don't pay any attention to previous RRP - they are like DFS sofas or Wickes kitchens. The B&R bikes are basic Chinese bikes - you find loads on them on alibaba. If you like the bike and the people who sell it then go for it.

it seems that you have ruled out the battery and controller. The next item to check is the LED display. This unit talks to the controller - telling the controller when to switch the motor and how to set the assistance level. It looks like this unit may have a communication fault. If you can...

you can get the Big Bear and change the chain ring to 52 teeth. It would then let you pedal comfortably at 22mph.

crank drive bikes will always be more expensive than hub bikes. If you can sell a crank drive for 50p then someone will sell the hub equivalent for 45p.

problem with Chinese e-bikes are not as much due to the low quality the parts as the laziness of sellers who do the importation. The factories are quite flexible, they can produce bikes that experienced pedelecers like d8veh want to buy, you only have to ask and perservere until they deliver the...

if you want a fast bike, you have to build one yourself or buy an s-pedelec like Kalkhoff BS10 - most UK suppliers have to restrict their bikes to 15mph. If you only need to go short distance, maybe a folder would do?

please tell us more about your friend, her current bike and the kind of commute she is doing.

are you going to do the full 28 miles next Tuesday?

the GoCycle has a very clever way of removing both wheels

the bbc made the story much bigger than what it really is. Find me a big website that has not been patched.

you know you've done 10 miles with a little headwind - the battery should be 60% full. Rule of thumb is 10WH/mile on flat roads if you pedal lightly, 15WH per mile on throttle alone. The meters are not a reliable indicator. They show current battery voltage, they drop when you are riding and go...

it seems there is still a lot of mileage in pouch cells.