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spokes get loosened with vibrations from the motor. Some people use linseed oil or blue loctite to reduce the effect of vibrations but you still have to check them regularly. Invest in a £2 spoke key!

the specs look good, strong contender to Bosch reign you think? http://extraenergy.org/main.php?language=en&id=46919 M25 - Technical Data Weight: 3,99 kg (M25T), 3,95 kg (M25TC) Nominal Torque: 22N2m2Nm Max. Torque: 50Nm Nominal Output: 250W Maximal Output: 350W Efficiency: 75% Noise Level: <...

or drill deep into the ground, build a geothermal power station, turn flood water into steam and kill two problems with the same amount of money.

broken spokes is an issue only for rear hub motors because the motors' rotational inertia inflates the forces applied to the spokes when you brake hard or when you hit a bump. Front hub motors don't suffer as much because the motor is mounted on suspension forks. Crank drives never suffer from...

the way the XOFO rear hub motor with in motor torque sensor works is quite simple: the cassette is spring loaded, 12 magnets arranged on a ring activate 4 Hall sensors which translate the angular deplacement (which is proportional to pedalling force) directly to a throttle voltage, wired into...

the only current kit rear hub motor with torque sensor I know of is from XOFO, http://szxfmotor.en.alibaba.com/productgrouplist-213764637/Ebike_Kit.html Woosh has a bike (£725) based on this kit: http://wooshbikes.co.uk/electric-bikes/sport-ts/

I think the problem with Chinese spokes is not so much in the quality of the spokes as in not doing the wheel truing properly. Few factories have automatic spoking machines - unless you true the wheel yourself, there is no guarantee that the tension is correct. Spokes that have low tension will...

this one (£675)does: http://wooshbikes.co.uk/electric-bikes/zephyr-cd/

welcome to the forum Max. Lots of members have had problems with spokes breaking on their rear wheel hub motor, you are not alone. You only need to replace broken ones but you will need to master the black art of wheel truing, that's the only way to get rid of the problem. Spokes break when...

so how was the London bike show?

quite a few towns and cities in France run a scheme like this. Aix les Bains Arcachon Bagneux Besançon Blois Bordeaux Chambéry Clamard Colmar Epernay Fontenay-aux-Roses GIE Chamnord La Motte Servolex Les Herbiers Lyon Malakoff Marseille Mende Nancy Nantes Métropole Nice Paris Plaine de l’ain...

it would be nice if someone makes a bluetooth or wifi watt-meter then it can be tucked away in the controller box or the battery case. BTW, what you you use to sketch your circuits?

you mean the interference causes the badass kit to indicate beyond 15mph?

and if I remember correctly, you have quite a lot of hills? this bike has a weak motor.

Bikes with 36V 10AH battery are very popular for commuting but often require recharging daily or every other day. If you can change that to once weekly and sell the bike for less than £500, a lot more people would adopt e-bike as cheap transport. I thought it may be doable with 100W flexible...

When someone posted a video about 50mph bike, one million people watched it. Although it's not for me, I accept that Frank may have a point. thank you for keeping us posted.

a small ICE may solve the problem of range. Instead of a £500 battery, only a small battery with high discharge rate is needed, resulting in a much lighter and cheaper bike. I am waiting for light weight flexible solar panel to become cheap enough to carry in rear panier.

it's all because we are not allowed to recharge our battery with an ICE while riding while cars are. Solar panels are too bulky to get round the legislation, only fuel cells are allowed.

stick to the ones recommended by members. If you want to buy enough to trade, check that their factory has a valid export licence. Avoid also companies with a sister company based in HK doing import/export, you pay their HK company while the order is fulfil by mainland China, if something goes...

so you buy from China?