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The small rear xiongda motor with controller/lcd/packaging, weighing under 2kg. It's tiny. It is a freewheel motor 135mm wide dropout axle width. It will take an 8 speed freewheel with 3or4mm spacer washers on the freewheel side which would maybe need taking into consideration when measuring...

Interesting article:- https://www.theguardian.com/money/2017/jul/01/electric-bikes-commute-work-e-bike-budget?CMP=share_btn_tw Daily 56 mile round trip though? Thats some doing even on an ebike.

The canyon orbiter concept ebike, this looks nice. Can't see any sort of drive shaft/chain so am thinking it's motor only powered and the pedal power is transmitted electronically to the motor. Don't know where the battery or brakes are but it even has traction control...

I might try one of these 9 mosfet controllers 17a and/or 20a as I like the look of the LCD-2 and the LCD-6 but the description states they are square wave and for sensorless motors. Will they still work ok with say a q100h or q128h sensored type motors...

Get up to any bank holiday weekend projects last weekend? In between more painting the house exterior I give myself the project of turning these parts into a normal front wheel since mine needs changing and I hadn't built a normal non motorised wheel yet. Mavic A119 Rim Shimano M525a Hub Halo...

So I build a wheel with a cheap chinese rim and fit a new marathon plus tyre with new inner tube. Pumping it up to 50psi I get a tyre bulge near the valve. Q1 What causes this bulge ? So I re-fit it all and only pump up to about 40psi which is just when the bulge starts, but now I got the tyre...

So I've lots of these cells out of my old ebike battery to check and match up. The routine I've come up with is 1 - charge up to 4.2v and leave a day or so to settle and check they are still around 41.5-42.0v 2 - discharge to 3.0v@1a and take a mah reading on my imaxb6 for reference 3 - charge...

I am retiring my first original battery which has done me proud. 10aH Bottle battery, cost £230, aprox 13'000 miles, 3 years old, used for 20-miles daily. We've had a good 3 years together used daily through all weathers and even submerged through knee high deep floods but is now at the point...

Any idea how to get the bearings out of a Bafang CST motor ratchet part? My inside one I'm pointing at had seized which I've now got turning but it feels like it's got sand paper in there. I've tried pressing them out with a socket and vice which has loosened a spacer between the 2 bearings but...

I bought 25.2v 2a cc/cv charger/powersupply for a simple way to charge my 6s lipo batteries when away from home. Since it was cheap I'd better test it as at 25.2v my cells would need to be perfectly balanced. I have found it to be 25.4v !!! This is no good but tried it anyway. When my cells got...

Problems- 1 - I have a 36v 20ah battery doing nothing 2 - I have a dark path down the side of my house where I can't really wire electric to. A possible solution I can think of is use my 36v battery with some sort of dc-dc step down to 12v (powerful enough?) connected to 2 - 12v pir sensors...

I fancy trying a thumb throttle and like the look of this design. Does it look like a generic one which will work with most standard controllers e.g S06S KU??? etc...

Can I use this variable dc power supply to charge anything from a 8.4v or 36v and 48v li-ion or bulk charge any size rc-lipo battery all by adjusting it's volts as required, and if needed could I also use it as a regular power supply for say a laptop or something by changing the volts to as...

I've always wondered how these brake cutoff sensors work so having another one fail I decided to take it apart. The 2 brown rusty blocks are magnets, the end one is fixed and the inside one is supposed to be loose which I believe sticks to the cable (even the stainless cables are magnetic...

My old battery cutout yesterday as it has been doing lately(it's on it's way out) so swapped to my spare as usual. When I switched on my ODO had reset to 00000 AAARRRGGGHHH !!!! Earlier this week it had just passed 13'500 miles. I was collecting cycle miles like points and...

I want to run 2 or maybe even 3 cree lights and find the cheap batteries you get with them cutout really quick with a couple lights connected so am carrying 3 batteries for now. I have a spare 2s LiPo battery so cut the discharge wire off an old rubbish chinese li-ion battery and soldered on a...

Got a puncture in my front tyre the other day. Inspecting the tyre I noticed it had a split along it and realized it had been on since the bike was new. It's done nearly 14'000 miles. Not bad I thought. I think it's time to replace it now I must have got my moneys worth out of it by now. Go on...

I wired a spare watt meter to show the power going into my battery whilst being charged just to compare with the watts I was using and there is some watts missing somewhere. With the same journey twice and battery charged to full - Power used 3.37aH / 117wH Charge back in 3.5aH /145 wH next...

My 36v 10aH battery is well used and nearly expired. Today I stuck my WATT meter on my battery for the first time in quite a while today. It told me my regular journey used 3.37aH or 117wH. (most of the journey was at about 32v too) In theory, if I were to replace the battery with one which is...

Our runabout car battery is flat, registering about 2.5v and having never had a car battery problem for 20 odd years I've no car charger. I do have one of these imaxb6 chargers though and am wondering if anyone has used the pb setting which I am guessing is lead acid battery, and could offer any...