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let's be honest, if you know how to look after your derailleur, how often you bang your chain while changing gears? NuVincis are heavy and expensive, bought by people with more money than sense.

Tepco has plenty of contaminated water to get rid off and nowhere to store it. What happens then? let contaminated water evaporate? let it leak into the ground? load it into a ship and dump it into deep waters? I think the problem will get worse - not better. If the core heats up, then they may...

http://www.nytimes.com/2013/09/01/world/asia/radiation-near-japanese-plants-tanks-suggests-new-leaks.html?_r=0 About 430,000 tons of contaminated water, or enough to fill 170 Olympic-size pools, are stored in rows of tanks at the plant, which appears to be running out of open space to put...

Is it possible to build a NuVinci system into a crank motor?

Thank you for pointing this out, it can produce a 'wobbling effect' in pedalling thinking about it. Any torque sensor would sense less pedalling effort when your feet are near vertical, reducing the assistance at the wrong moment.

is there any point in synchronizing electric assistance to the position of the cranks to lessen impact on knee joints? this can be done more easily on a crank drive.

why do you want to describe it as a pedelec? your customers who want to buy this kit will know what it is capable of, it's their responsibility where they want to ride and how fast they want to ride.

as d8veh said, the power restriction is so lax that it is near non-existent. However, if you have a sticker that says '500W' - no Chinese lab is going to certify your bike. Your problem is a moral one: knowing that you build a 500W bike, how are you going to tell your customers that it is a 250W...

you can build a legal CST bike like kudos do - why bother with a switch?

what makes the bike legal is the EN15194 certificate and don't assume that a 500W bike will pass the test.

Malaysia, the Maldives, Turkey are examples of Islamic democracies.

I don't think that flecc wants to keep SH. Often our politicians only look at the 'national interests', in other words, short term moves, no exit strategy. Hence the cure is worse than the disease. Conflicts are necessary, borders need redrawing now and then but one thing remains constant: big...

is a death by gas any more cruel than death by other weapons? People who make moral judgement should also experience reality of war. There are no winners, only losers in the battlefield. Conflicts are usually about land and natural resources and the winners are big businesses. Syria's dividing...

thank you for the link. I like the idea of a bigger version of the GoCycle but I am not so sure about the battery location. I thought the designer tries to make a point. He should place the battery somewhere more accessible. Another titbit of news I picked up from Eurobike 2013 catalog...

Just spotted this bike from Eurobike 2013 PDF catalog: What do you think?

sorry John, my mistake. denwyn needs to buy a bike today and your Forza would suit him very well.

thank you Alex. Your bike is a suberb model for self builds. John: denwyn is based in Taunton, his exchequer has set the budget at £800 to £1,000.

denwyn, mjwobble wants a 1500W bike, is that what you want? Crank drive bikes get you up the hills but won't fly you up the hills like these 1500W bikes do. only alien Ocean and Banbury Frank make these powerful bikes.

by the description (8V at the output), it looks like the power switch FETs are shorted possibly due to motor seizure. Can't be easy to fix.

No fracking in England! Have you read the ASA ruling on CRL prospectus? I know Lord Browne has long arms but planning will slow them down, HSE costs alone will exceed production cost in Poland.