Endless Sphere

The <38mOhm value for one cell I used is for 1kHz AC, for DC it's more like 50mOhm, and MOSFET resistance of the BMS could also be about 10mOhm and it was a bit cold so I guess everything is fine. Are you not using a BMS for this battery and do you also measure it (voltage sag) divided by (battery a...

Thanks for the info! What cells do you use in your 16s12p pack?

I did not build the pack myself, so unfortunately there are no fotos. I was just asking if anybody can post the internal resistance of his pack. If I assume an internal resistance of 38mOhm (lygte-info.dk writes <38mOhm), so for a 14S10P pack combined cell resistance would be 58mOhm. The resistance ...

Of course there is no typical voltage for all 18650 packs. I am just asking if there are typical values for certain packs (like 13s5p mj1 or 14s5p GA or what ever) to see if it is normal that the internal resistance is 50% higher than the calculated value (without resistance of connections inside th...

My controller logs battery current and battery voltage. I am simply calculating it resistance = voltage sag divided by current. The 38mOhm was probably AC resistance. But shouldnt DC resistance be lower? Battery temperature was about 15 degrees Celsius. There was no significant difference between 90...

When calculating internal resistance of my 14S10P Sanyo GA pack based on voltage drop it is around 90-95mOhm. I read that the internal resistance of one GA cell should be <38mOhms, so I expected the internal resistance to be 14/10*38mOhm + 5mOhm (wire resistance) = <58mOhm. Are the 35mOhms caused by...

Do you think a sandwich (plate of hard material - foam - plate of hard material) has any advantages over just hard material outside and foam inside?

No, I use a 3-arm gear puller

It is "buckled" (out of true). Maybe 1mm at the spoke flange. It sits perfect inside the dropouts and is fixed by torque arms on both sides (connected to IS2000 mount on the left, and to a thread I cut into the frame on the right) The cover screws are only M4, so they should only be tighte...

The problem is not the brake disc. The motor itself is not turning round, which caused the rim, the brake disc and the flywheel to be out of true. I checked it by holding the end of a zip tie to the spoke flange on the side where I have spoke elbows inside. I put the Statorade directly onto the roto...

On a 45mm magnet 3kw motor (very similar to mxus 3k), I have yesterday removed the right cover, added some more Statorade, and then reinstalled the right cover with silicone sealant. After that the motor was a bit out of true. Less than a millimeter on the spoke flange, but I had to retrue the rim a...

The pack is about 68mm wide. At the moment plus 2x 6mm yoga mat on each side. I don‘t want more than 4mm on each side. With the yoga mats knees are almost rubbing on the frame bag. I don’t do hard offroad riding with this bike. The bag is secure while riding (secured by about 10 velcros). When crash...

Carbon Fibre plate. sorry

On one bike I have a large triangle battery inside a frame bag. Crash protection should be light and not too wide, so knees won't touch the frame bag while pedaling. At the moment I am using a 6mm yoga mat on both sides. Knees don't rub on the frame bag while pedaling, but it is really close. And th...

I have used two brass thread inserts to repair the thread. Quite simple and now and it is as tight on the handlebar is it should.
Just need to drill out the holes and melt the thread inserts in with a soldering iron (remove all tin from the tip before)

Same happened to me. Definitely feels way better than the Chinese stuff, but it is still far away from perfect.

Are the any other good quality throttles?
The feeling and controllability of the Domino is great. Unfortunately it needs quite some space, gets damaged by crashes easily and the thread is made of plastic. Also I don’t need the integrated switch it has.

I am looking for solutions on the following problem: https://i.ibb.co/WkbxLRy/DSC-3114.jpg There is a large 140 cell triangle battery + charger + controller inside a triangle frame bag. I will secure the battery inside the pack a bit by using velcros, but that alone won't do the job. The battery its...

Domino throttle and thumb throttle for regen are on the right and I dont want to change that, so the shifter has to be on the left. There are non-index grip shifters for the left (at least they say that on the ebay description) but I dont know if cable length would be okay. I will probably try that....

Thanks, I think that’s the best option.
Did anybody already try if 3speed (non-index or converted to non-index ) twist grip shifters for front derailleurs would work with a 5speed rear derailleur?

Sorry, I confused friction shifter with grip shifter. What I have already on one bike is a non-index friction (thumb) shifter. What I would like to try is a twist grip shifter. Do you think a 5speed indexed would work fine with a vintage 5speed Shimano derailleur? Would a non-index 3speed grip shift...

On another bike I use a Shimano 5speed vintage derailleur (I think from the 70s) and a non-index thumb shifter. Probably I will try a friction shifter this time, but I would need one for the left side because on the right I have a Domino throttle and a thumb throttle for variable regen. Can a 3speed...

When using a 5speed freewheel cassette on a big rear hub motor, with which rear derailleurs can it be combined?
Is a 7/8 speed or even 9speed derailleur fine, or does it have to be a 5speed derailleur from the 70s?

When lacing a rear hub motor in a one-cross pattern with all the spokes exiting on the same side, do you put the spokes which are stretched on acceleration on the outside (like it is done in the Grin lacing YouTube video), do you put them on the inside or do you put them diffently on the right side ...

I mean if somebody made simulations for a rear hub motor ebike using existing programs. Yes, doing that would be very time consuming I think and probably not worth the effort. Better just trial and error and test it practically. Is anybody using sheets to direct air to the hub motor and did you noti...