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There is currently very little work done in the area of high powered geared motors, may be worth looking into. I think that at over 1,200W (about twice the power of the BPM), the geared hub motors will become too brutally direct and powerful to control.

final price £561. It may not be what you would have liked, but in view of the time of the year, I believe it's fair and you did the right thing. If you had waited a couple more months, the remaining warranty period would have been less, that would have affected the result.

if you like value for money, the £809 woosh Big Bear LS is hard to beat. It has BPM motor and 15AH battery.

it's kind of ironic isn't it that the most active cyclists are those who commute 20-30 miles a day, they do hell a lot more miles than the weekend lycra types and yet, our goverment would not want to see them as representatives of cycling - they'd rather see the lycras. The general attitude of...

you can use 12AWG or 14AWG silicon wires to connect the two batteries. http://www.ebay.co.uk/itm/14awg-Silicone-AWG-Wire-1m-2m-5m-Red-Black-/390991578774 a bit of cable conduit keeps it from rain...

the guy who is after a fast e-bike (e.g. cwah) wouldn't want to buy from Col anyway, Col loses nothing. The customer will most likely get an s-pedelec or do a conversion. Most people who buy e-bikes are pensioners buying for leisure ride or campers/caravanners. I reckon two thirds of them want a...

I'd hazard a guess that the uptake of dongles for Bosch bikes is very small. It's the medium/long distance commuters who are after higher speed to save time. They tend to go for conversions or Chinese.

BEBA doesn't exist anymore.... when? their website is still alive: http://www.beba.info/

if you are a member of BEBA, it's your duty to educate the commoners.

the running cost of a £2k commuting bike is not very low. For the first year (16 miles * 250 = 4,000 miles), you'll need to add dongle (£100), lock, mudguards, lights and bell (£100), puncture proof tyres and maintenance (£200) and depreciation (£1,200). Total £1,600. If you want low cost...

something like this?

with this bike? 25mph is doable, 30mph unlikely. You need 700W at the wheels (500W from motor + 200W from human) for 25mph, 1,100W for 30mph. That's before taking into account gradient and headwind.

Very nice donor bike but it's not easy to find spokes for 24" wheels. For rear hub motor, you'd need 300 RPM rear motor with cassette adapter.

£9 for a chain toll at Halford? get this one for £2.45 from ebay or Argos: http://www.ebay.co.uk/itm/BICYCLE-BIKE-CYCLE-CHAIN-RIVET-EXTRACTOR-PIN-RIVET-SPLITTER-BREAKER-REMOVER-TOOL-/301507850923

woosh will have 15AH rack batteries in next week. They come as a complete kit, rack, battery, lock, controller box.

you normally don't need to break your chain. The front derailler has a small cage bolt at the bottom. Undo it, open the cage - that's all you have to do.

that's a positive attitude! I am sure your supplier would appreciate it.

it would be nice to have gear change sensor integrated into a hub gear.

have you checked their motor performance curve? what' the efficiency at under 100 RPM? on a 26" bike, 100 RPM corresponds to 7.5mph, below 100 RPM, most of what you put in the motor turns to heat. DD motors are so inefficient at anything less than 150RPM that makes them totally unsuitable to...

the sine wave controller has a slow power ramp and is limited to 18A, that means that you get at most 24V * 18A = 432W. In addition, DD motors are not good at low speed unless you throw 40A at them at start. Trust me, this combination is not going to be the best bike on the market. If your plan...