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Good to hear that the NYC Housing Authority ebike ban fell apart. |
This is a problem that absolutely needs addressed, but that wasn't it. |
my bike made a weird high pitched noise this morning and the hub wouldn't spin |
I restarted that battery and it just worked normally |
not sure what happened there |
this was my first commute with 40A field weakening |
I forgot to turn on my speedo app tho |
They need to have regulations and standards for batteries not banning batteries @molluscs @NCC1941 |
self-start fault |
phase could probably have been loose or some other sporadic fault |
So, I managed to IQ over 9K connect battery with reverse polarity to my Kelly controller, by some absolute miracle the thing still works, but it makes a low frequency rumble at low speeds, best case and what I assume is, caps are shot, they self discharge rather quickly, also controller now needs more volts than before to turn in, so there is probably more damage, any ideas? |
I will open it up one of the following days and inspect a bit. |
Also while I'm back on stock generic 48v 15 or 18fet idr 1000w controller, how much shunt can those cake before flames? |
@Aramož low frequency rumble sounds like you might have fried one of the output phases? dunno. |
I had partially fried one phase before on another cheapo and it didn't rumble, it did cut out and eventually completely fry all the FETs on that phase |
It is possible tho :/ I'm no doctor |
You were correct, one phase reads double the resistance of others |
What a mess |
that phase wire is either cooked or the winding is |
Green phase, middle section of FETs |
Y b read 54k and green 108 |
It's such a nice double makes me think twice |
Quite a beauty, such a shame I ruined it |
Ahhh. that sucks. |
You think I could keep riding it at low power levels or? If it won't destroy gate drivers, I think I would have to replace all of the FETs either way, or can you mix and match? |
You should be able to mix and match if you replace all the fets on a phase |
id really fix it. might cause motor damage depending how its failed |
Your controller is something you do *not* want to fail badly |
Fancy going for a spin with your throttle pinned wide open because one of your controller FETs went short circuit? |
Does it work that way? |
So just like, usual, digikey/mouser look for similar specs? |
Well potentially, if the controller has dodgy or no safety cutoffs |
Not likely but still |
Yep.. try to find ones without outragiously higher gate charge |
(cheap ones often have high gate charge) |
(Basically how much energy the gate needs to change its voltage) |
generally expressed in pf or nf (Capacitance) |
Hello all, not sure if this is the right channel for my question. |
I have a Himiway Zebra, been using it to commute to work when the weather is nice and really enjoy it. |
I have learned that the *huge* 26x4 fat tyres are primarily made for snow/sand and was wondering if it is possible to change to something like 27.5x2 tyres without completely screwing up the bike |
It is not |
Not without significant expense |
and the removal of the ability to use wider tyres |
Ah okay. Boo I guess, I was hoping it'd be simple since thinner tyres would fit |
Wishful thinking it seems |
Could you cram them on? Potentially yes. |
Would it be screwed up? Also yes. |
The tyre to rim ratio has to be within spec |
Otherwise you risk some serious problems |
Gotcha gotcha. Thanks for the warning, safety has been a primary concern commuting in a big city . So I'll forgo any such mods |
Honestly, you're not at a huge disadvantage anyway @Snowbear |
It's just less efficient in terms of rolling resistance |
and more likely to sustain flats |
and the tyres themselves cost more |
Yeah my main reasoning for even doing was to lighten the bike slightly, make it a bit easier to go and down the stairs at home. So no big loss |
It's possible you could go down to 3" tyres if that would make a difference to you @Snowbear |
Depending on the width of the rim u can go down to 26x3 (maybe even 2.75). |
Pretty much ur minimum width for a fat tire is the width of the rim. |
on my ride home id sometimes get a tzzz tssss slightly metalic sounding noise, as if something is brushing up against something at a constant and fast rate |
this would happen only when the motor would start going |
earlier today didn't have this, bike totally silent |
it was hard to understand where exactly it was coming from but most likely around the cranks and the middrive |
its a bbshd |
just installed so don't know much, anybody know what this could be? |
You could just get another wheelset, with normal rims on fat hubs, although if you have hub motor, you would also have to get another one of those and makes it kinda not worth it, or maybe in the long run, who knows |
That actually amazes me, no one has(I haven't seen yet) made a hub motor with bolt on flanges, for easy tire changes, I must be a genius lol. |
They have made that |
Lily, link or name? |
I have only seen where you also replaced magnets, which is not really good |
So I was noticing sometimes my throttle would lightly trigger idling sometimes and had no idea why. This morning my controller would not activate because it detected throttle on during startup |
Throttle wire right under the brake lever magnet. Moved it down a bit, problem solved. |
I find the dumbest shit |
Haha, good fixing @Trenavix |
I think that kind of noticing will give you a lot of perspective |
Yeah i'm sure 60yo mechanics have so much random knowledge to share |
Knowledge is knowing that you can use a 1mm spacer to make a 10sp cassette fit on a shorter freehub body |
*Wisdom* is knowing that you *can't* |
You probably could get some tires that are still x4 but more for streets |
Vee Tire 26x3.5 Speedster Fat Tire 90-559 Folding Bead Silica Compound 120 TPI https://a.co/d/6Px6W6Y |
Something like this |
Then when it snows you can swap back |
those are terrible tires |
ran them for like 2 weeks had to swap back to OEMs |
got so many flats |
things are as thin as a free condom. |
So don't get those lol |
But something like them lol |
yeah i run mammoths now |
crushes glass like a tak |
has a road strip and side teeth for if u offroad |
I'm running Maxis Ikons and I love them |
Not fat tire tho |
They are 26x2.20 |
not bad |
my cruiser is running 2.5s |
moto-x |
I remember getting some ebike rated continentals and they were horrible |
I got flats almost everyotherday |
the moto x are ebike 50 rated, got decently thick tread meat |
Maxis ones I have are not ebike rated but I have not had any issues |
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