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by Chalo
Oct 21 2021 9:52pm
Forum: Stand-up EScooter/ESkateboards
Topic: EXTREMO - Scratch built 7kW billet frame scooter
Replies: 49
Views: 2628

Re: EXTREMO - Scratch built 7kW billet frame scooter

Hi, Good Work :bigthumb: :bigthumb: But that would be a normal folding like other ebikes. Since your design has a impact of VOSTOK, expected a different one. If possible work on folding mechanism more.(Just my Suggestion). Why don't you ask how much it weighs before you wish it to fold? Do you want...
by Chalo
Oct 21 2021 7:23pm
Forum: Motor Technology
Topic: Hub Motor Idea
Replies: 29
Views: 301

Re: Hub Motor Idea

The cycloidal reduction is a very cool idea! I haven't seen that one yet, but it looks to be very robust, witch is what we want to see in cycling. Planetary gears don't give me any confidence. I guess the ubiquitous use of planetary gears in both internally geared bicycle hubs and traditional autom...
by Chalo
Oct 21 2021 3:08pm
Forum: EBike Technical
Topic: Importance of these 0.2mm Bearing Spacers
Replies: 2
Views: 42

Re: Importance of these 0.2mm Bearing Spacers

They're probably there to take up discrepancies in the axle stack so the bearings don't get side loaded.
by Chalo
Oct 21 2021 1:37pm
Forum: EBike General Discussion
Topic: Newbie Questions
Replies: 35
Views: 494

Re: Newbie Questions

What do you do to achieve LVC? Controller? I have 36V controller, 36V battery with no lvc, 52V with bms lvc and looking at 48v+ ev modules. You could use one of these low voltage cutoffs, driving a high amp relay: https://www.ebay.com/itm/313689214307 https://i.ebayimg.com/images/g/5QoAAOSwLsRgcZWm...
by Chalo
Oct 21 2021 12:14pm
Forum: Items for Sale - New
Topic: Magicycle E-bike
Replies: 3
Views: 141

Re: Magicycle E-bike

CraigW wrote:
Oct 21 2021 8:12am
It's a beautiful ride, right?
No, the bike looks ugly and stupid.

Go here and have a look at the rules for posting in this section:
viewtopic.php?f=31&t=25446#p367806
by Chalo
Oct 20 2021 12:54pm
Forum: Battery Technology
Topic: Ebike Battery pack got unbalanced. Reasons?
Replies: 14
Views: 309

Re: Ebike Battery pack got unbalanced. Reasons?

Its been commonly posted that "BMS" stands for battery management system, but...ebike mechanics and design engineers have told me it actually stands for Battery Murder Suspect. Do with this knowledge whatever you wish... Ah, but when you eliminate that suspect... then you become the perso...
by Chalo
Oct 20 2021 12:47pm
Forum: EBike Technical
Topic: Power consumption sweet spot
Replies: 11
Views: 160

Re: Power consumption sweet spot

Thanks for the answers! I usually keep a steady 20 mph when I travel. What is your opinion on swtiching from my hub drive to a mid drive in my case? Will it consume less because of gear adjustment? Sry but that grin simulator beats me. I got a little more range per watt-hour of battery with BBS02 t...
by Chalo
Oct 20 2021 12:03pm
Forum: Battery Technology
Topic: Ebike Battery pack got unbalanced. Reasons?
Replies: 14
Views: 309

Re: Ebike Battery pack got unbalanced. Reasons?

Whether using a RC Li-po "Blinky" or inexpensive Li-ion BMS neither is a cure for 2nd rate cells and/or pack abuse. What i mean is that with 2nd rate cells or an abused pack it isn't possible to balance the p-group cells within 25 to 30mV of each other no matter how long (i.e. weeks--mont...
by Chalo
Oct 20 2021 1:53am
Forum: EBike General Discussion
Topic: Newbie Questions
Replies: 35
Views: 494

Re: Newbie Questions

99t4 wrote:
Oct 19 2021 7:04pm
Truly "good" deals on batteries are extremely few and far between.
Salvage is where the best value lies, in my experience.
by Chalo
Oct 19 2021 7:59pm
Forum: Motor Technology
Topic: Hub Motor Idea
Replies: 29
Views: 301

Re: Hub Motor Idea

I can tell you right now you'll probably have to deal with several kinds of specialists: a motor winding specialist and a gear cutting specialist at least. The gear maker can probably do all your other machining if he's willing to do it and you're willing to pay his rate.
by Chalo
Oct 19 2021 12:51pm
Forum: Large EV General Discussion
Topic: Students’ solar-powered camper van turns heads on 1,800-mile road trip
Replies: 8
Views: 223

Re: Students’ solar-powered camper van turns heads on 1,800-mile road trip

If that vehicle had rigid walls in the pop up, you wouldn't be able to drive (or enter and exit) with it in the down position.

Look at that ground clearance! I'm sure it improves aerodynamics and increases range, but it looks like you'll high-center the thing if you camp anywhere besides Walmart.
by Chalo
Oct 19 2021 12:36pm
Forum: Battery Technology
Topic: Ebike Battery pack got unbalanced. Reasons?
Replies: 14
Views: 309

Re: Ebike Battery pack got unbalanced. Reasons?

Just wondering, how can a broken BMS without balancing function unbalance the pack? :wink: I'm getting my Active balancer this week, a year later.... :lol: Yes, some BMSes draw their power from just one or two cell groups rather than the whole pack, so over time those groups get drained down if the...
by Chalo
Oct 19 2021 11:45am
Forum: EBike Non-hub Motor Drives
Topic: TSDZ2 36v 250w vs 48v 750w riding experience
Replies: 5
Views: 198

Re: TSDZ2 36v 250w vs 48v 750w riding experience

Only if these display's are delivered and working with the stock Tsdz2 you can use them. If you buy the display separately than it doesn't work, because of the different I/O protocol. I learn new things about how "awesome" TSDZ2 is all the time. What a brilliantly "designed" and...
by Chalo
Oct 19 2021 11:40am
Forum: Bike Mechanical & Structural
Topic: sealed bearings headset for fat bike
Replies: 5
Views: 176

Re: sealed bearings headset for fat bike

It occurred to me that if you try to adjust the headset without first loosening the stem, nothing happens. Since we don't know your level of familiarity with this equipment, here's a video tutorial:

by Chalo
Oct 19 2021 11:32am
Forum: EBike General Discussion
Topic: Newbie Questions
Replies: 35
Views: 494

Re: Newbie Questions

However, the folding function is a quality that is hard to quantify. I've travelled with it on Trains and such and had a really good time using it to explore this summer. But fat tire folders are several times bulkier than regular folding bikes when they're folded. When they come into the shop, the...
by Chalo
Oct 19 2021 10:33am
Forum: EBike General Discussion
Topic: Newbie Questions
Replies: 35
Views: 494

Re: Newbie Questions

I like the bike actually. Is there any specific reason you would deem it useless? Would you enjoy riding it if you didn't have motor power to help? If not, then it's a bad bicycle even when you add motor power. And it's a laughably feeble, rickety little motorcycle. There is a reason that fat tire,...
by Chalo
Oct 19 2021 10:26am
Forum: EBike Troubleshooting
Topic: Ebike hub motor play at axle
Replies: 9
Views: 271

Re: Ebike hub motor play at axle

Once you get the covers off, you should be able to read the bearing number printed on the seals, for instance 6004 RS. If not, you can identify them by their dimensions. I go to a local bearing shop if I'm in a hurry, or to VXB or The Big Bearing Store online if I'm not. Bearings crap out for many r...
by Chalo
Oct 19 2021 1:40am
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5562
Views: 661541

Re: Sur-Ron - New Mid drive Bike

I've gotten in trouble in my small town. I think you answered your own question. In my experience, the smaller the town, the less the law enforcement has to do. Also, it's always a bad idea to ride something that's conspicuously illegal. Plate it or keep it off the street. Why is this hard for some...
by Chalo
Oct 19 2021 1:35am
Forum: EBike General Discussion
Topic: Newbie Questions
Replies: 35
Views: 494

Re: Newbie Questions

antonbj3 wrote:
Oct 19 2021 1:30am
The goal is to sell the bike eventually. So I prefer not to invest in stuff that is unlikely to be a selling point.
Then why bother getting a more powerful than stock controller?

That bike is built to get in its own way. If you're not going to keep it, let it be the useless object it is.
by Chalo
Oct 19 2021 12:37am
Forum: EBike Troubleshooting
Topic: Ebike hub motor play at axle
Replies: 9
Views: 271

Re: Ebike hub motor play at axle

That's usually either wrecked axle bearings or loose fitting bearing seats. You'll probably have to pop off one or both side covers to learn which it is.

If it's loose bearing seats, you can use slip fit assist Loctite to keep them still. If it's worn out bearings, just get new ones.
by Chalo
Oct 18 2021 8:43pm
Forum: Bike Mechanical & Structural
Topic: sealed bearings headset for fat bike
Replies: 5
Views: 176

Re: sealed bearings headset for fat bike

You probably don't have enough spacers in the stack. The spacers should come up about 3mm past the top of the steer tube.

If you overtightened the star nut, you may have ruined it.
by Chalo
Oct 18 2021 6:37pm
Forum: EBike Technical
Topic: How to design a turbo boost
Replies: 47
Views: 966

Re: How to design a turbo boost

I' have a 10speed DNP Epoch Freewheel with the 11t sprocket on it. I like the freewheel but it's a fair bit wider than my 7speed, leaving less room on my DD hub axle for for torque arms and axle Nuts. I don't like having to skimp on torque arms or not having enough thread for the whole axle nut. Wh...
by Chalo
Oct 18 2021 4:02pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 101
Views: 4069

Re: Bafang front wheel Uber motors - which controller

docw009 wrote:
Oct 17 2021 11:38pm
I get enough front wheel slippage that I'm glad I didn't go 25A.
That's just as well, though that's probably more due to the rear heavy weight bias of your bike than to an abundance of torque. You could move your battery out front and that might help.
by Chalo
Oct 18 2021 2:40pm
Forum: EBike General Discussion
Topic: Need a 26+ ("plus"...will take 3-inch wide tire) aluminum MTB frame
Replies: 15
Views: 393

Re: Need a 26+ ("plus"...will take 3-inch wide tire) aluminum MTB frame

pullin-gs wrote:
Oct 18 2021 1:35pm
Indeed......it's newby-baited to make the straight-tube look like it's tapered. :-)
I think it probably makes the top tube and down tube miters easier/cheaper, too.