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I think it depends on whether you bought it from the website (mail order) or from the shop.

das Kalkhoff for singular, die Kalkhoff for plural.

reading a bit further on, I discovered this very nice range calculator from Bosch, could be useful for other bikes with 15AH battery. http://eb.socialmedia.bosch.com/bike-en/index.php

http://www.cycleworld.co.uk/page/121/CycleWorld_Sizing he should be looking for a very large frame, 23". The Oxygen 13AH MTB has 19" frame. His original plan was to convert a Carrera with a BBS02 500W CD kit. That plan is still the most sensible, although I think the downtube on the Carrera is...

SWXes are 8-Fun 250W, BPMs are 8-Fun 350W. They have new models now, revised versions of the above: http://www.szbaf.com/en/components.html

100W. Joking aside, there are two factors that you can use to gauge the raw power of the motor: its diameter and its gear reduction ratio. The BPM for example has 180mm diameter, the SWX like on your Metro 120mm. The BPM can deliver roughly 50% more power than your SWX without overheating. The...

I think most are designed for car batteries, 12V-24V supply.

fitting LCD, thumb throttle, battery and motor wheels is currently OK for most DIYers. Only the pedelec sensor and the brake sensors are challenging. That's a design issue. Soon, there will be better solutions for PAS and HDB sensors.

you should also take a look at the woosh zephyr-b before deciding. It delivers power much more subtly than the Big Bear. It has a rear hub BPM motor, more power than most e-mtbs, 20A controller, in frame hidden 36V 10AH battery and both front and rear hydaulic brakes with brake sensors. It's not...

Three years ago, if you want a quality e-mtb, it had to be a German made Bosch powered 300W e-mtb. The market is now very different because it seems that the most frequently asked question is 'how fast?' - that means Bosch bikes are not what most people want any more. Still, I can't see Chinese...

the $370 Q128H kit has the same power as the Oxygen kit and would suit somebody with smaller budget.

the Q128H is a very good kit. You won't pull wheelies with it but it gives a nice, gentle and persuasive push - be careful with power consumption, it will pull 800W from your battery! Bmsbattery sells the kit (48V 8AH downtube battery + everything you need) in a 26" rim for about $370. Top speed...

before you go ahead with ordering, note that the Carerra Subway has the right gear shifter integrated with the right brake lever. You will lose the front derailleur, so replacing the left integrated lever with a sensored brake lever is not a problem but you have to keep the Subway right brake...

I'd suggest you ask them to fix the bike, don't send it back but sell it second hand and send you the difference. Buy locally next time.

why do you want to send the whole bike back? they don't need your bike, Plus, because the bike is out of warranty, they'll charge you to send it back! just ask them to borrow a battery or send your battery in.

how long does it take to replace a crank arm? a bottom bracket? or a crankset? it's quicker than waiting in the queue to talk to the salesman at Halfords!

If you want to get a BPM motor wheel, select one with the right speed. The BPM code11 runs at 280rpm, a bit too fast for your bike. I reckon code 13 230 RPM is a better match. you will need to make sure the motor cable will reach and plug in. On your bike, it looks like 3-pin 30cm long. You will...

that kit has been on bmsbattery website for more than a year. I haven't bought from them but d8veh and cwah are fans of bmsbattery, they may have done.

The Aikema 85F weighs 1.6kgs, available from a number of vendors as Q85 e-bike kits with your chosen rim. From bmsbattery.com for $330. https://bmsbattery.com/ebike-kit/575-q85-36v250w-front-v-brake-e-bike-whole-kit-ebike-kit.html?search_query=q85&results=13...

take the battery out of the cradle and check the fuse.