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I'm running a hub motor on my rear wheel. After getting a puncture recently on the rear wheel - where else - that was the final straw. This is a rear wheel that was already running on a Marathon Plus tyre and it already had a Tannus Armour insert... I still got a puncture. It looked like some...

After biking up Winnats Pass the other day on my hub motor with a lowest gear of 24x32, it got me thinking again about swapping to a mid-drive setup, so it can utilize my gears. I was doing about 4 MPH up that hill for most of it and I actually started to feel sorry for my hub motor at one...

I hit a dead end planning to fit my Hollowtech 2 PAS sensor to a carbon MTB frame that has a PF30 bottom bracket shell. This frame has a Praxis Works Shimano based bottom bracket and while that Praxis thing works really well under normal usage, it is too wide for the PAS sensor ring to fit...

I am sure my drive side axle nut didn't loosen but rather, the relatively thin M12 washer bent (went concave) giving the same end result, a tiny increase in the space between the nut and dropout. It wasn't fully loose but was far too easy to undo with my spanner. The non-drive side stayed tight...

I have a carbon frame with carbon dropouts. There's a recess close to the axle where a torque arm could be fitted as shown in the following image, but is this likely to ruin the dropout if the axle slips? This would have the torque arm pressing into the carbon. My motor can put out 45Nm. I am...

This is the 48V LiitoKala battery, advertised as 25Ah. The pack uses their own 21700 cells that are advertised as 5,000mAh. First time ever using it, today on a fresh charge I went 10.82 miles and the battery voltage went from 54.6V to 49.5V, with it saying it used 28% of the battery, which if...

This PAS magnet disc has bolt recesses in it for a 64 BCD 4-bolt setup. Does anyone know where sells it or what to even search for to find it? The original video is also under the image where I took the screenshot from. The backside of it is only shown in the video for a split second. The...

I got a battery with no switch and the first time I connected it there was a spark. I assume that was the capacitor in the controller taking some current for the first time ever, because about 10 mins later when I reconnected the battery, there was no spark. Each time I had everything plugged...

I was testing my new kit and it's a typical Bafang rear hub with the P850C display and YCSV126-001-48T controller. Here's the speeds the wheel was doing at each power level 1 to 9 with the bike upside down and no stress on the wheel: Level 1 = 11.5 MPH Level 2 = 11.5 MPH Level 3 = 11.5 MPH...

I bought a half-twist throttle for use with a hub motor kit that has a YCSV126-001-48T controller, but I am gradually finding that these half-twist throttle are only for use with BBSXX mid-drive kits? Is it hit and miss whether it will work with a hub motor controller? More likely it won't...

This is a 24t Shimano inner chainring, the only size chainring this BZ-10C magnet disc fits to and while it does clip in place, it's quite loose.. The clips holding it on are at about 9 and 3 O Clock: Clipping it against the notch (that's near 6 O Clock) on the chainring, just bends the...

In an ideal world we'd all buy that Satiator charger, but it's expensive. I had an idea... why can't you just have a voltmeter with an LED readout of the voltage, that has an alarm you can set to go off when a certain voltage is reached, that has an XT60 plug (or any you want) on it? Do these...

Is there any industry standard for whether the XT60 plugs on controllers and batteries are male on one and female on another? From what I can tell they are usually male on the controller and female on the battery, right? I saw a photo of a Greenergy kit showing the controller box having a...

I made a simple DIY battery calc in Excel to work out voltage, Ah, the amount of cells needed, cost, weight etc. Thanks to Woosh for correcting it. Link to calc: https://www.dropbox.com/scl/fi/5cb6wq8op52ik561zhy6k/DIY-eBike-Battery-Calc.xlsx?dl=1 Screenshot:

Hailong Samsung 18650 battery packs: The first battery packs I looked at were Hailong, in a hard case (meant to fit to the bottle cage mounts on a down tube) that use Samsung 18650 batteries. These packs are expensive - presumably because they have Samsung cells? A 48V 17.5Ah battery from...

Part of my bike frame near the dropout has these angled ridges that will overlap part of the torque arm that goes on the axle. What risk is there in filing those ends of the ridges flat so the torque arm plate sits flat? On this image, I have taken away the 2 parts of the torque arm plate so...

I know these axle nuts are M12 internally with a 1.25mm pitch thread, but does anyone know what size spanner is needed on the outside? Are they 22mm? I got the schematic and made it actual size. Measuring the left axle nut it is 22mm so I am guessing that's right? Cheers.

Back in 2014 when I had my Clean Republic Hill Topper 250W front hub motor kit, I used a pair of these Axle Release quick release levers. Are they safe to use on a hub motor? On a 250W I assume they are safe, because Clean Republic are still offering them with their Hill Topper kit now in...

Does anyone know what the chainline ends up at if using a Lekkie 42t Bling Ring on a 68mm bottom bracket, on the Bafang BBS02? All I can find is stuff like "9mm offset" but that's meaningless to me, I just want to know what the chainline is! The Lekkie website says: "Offset: 9mm – see User...

People with rear hub motors put a torque arm (or two) on their dropouts to help relieve the stress caused by the hub motor, but when you have got rear suspension and the motor applies power, is this not also making your rear triangle move upwards slightly? Think about it, the wheel rotates...