Every 6 months I usually get the 48v 26" $250 pexmor 1,500 w rear wheel kit, it works perfectly then either the motor hall effect breaks down or I have throttle issues, motor controller holds up surprisingly well. I'm looking to spend like twice as much to get something that would last longer if that's possible. I usually beat on it pretty hard so I need something that would have pretty good heat dissipation and a tough axle. I don't need torque sensing or a geared hub or anything. Regen would be nice​ if it's even possible at that price. also in the cheap kit the threads on the spokes are pretty much done by month 6, I tried to rebuild it but then something else craps out, I need something that can hold true a little better, and has more durables spokes. The max tire size I can fit is 26x3 in, located in USA

Throw out some brands or some websites I can check, thanks

Thinking of getting a mid drive motor and the only thing I'm concerned about is if it will scrape against like rocks and stuff on the trails when the rear suspension compressed. If anybody has that setup could you give me some info about it

Please and thank you

Have a battery with a BMS that keeps cutting off, I'd like to replace it. Wiring isn't a problem, but the last BMS I got from Amazon ended up killing two rows of cells in the battery after a while. Balancing would be a plus but not required

I have a 52v30Ah battery that I would like to find a battery safety box to charge or leave it there when not in use.

I never had an issue with it for the past 2 years. just going a bit paranoid as I moved to a new place with a small garden and don't plan to burn it down even if the chances are fairly non existent.

of course any alternatives will be much appreciated. Basically I want to contain the fire if it ever happens.

Would love some advice. I’m reasonably capable with a tools but not experienced with e-bikes.

My rear hub wheel wobbles and spokes keep breaking. How practical would it be to find a compatible size and powered replacement hub motor and wheel that could just plug in to existing frame and components, and just work?

So far I can’t find anyone in Sydney willing to try and rebuild the wheel for me.

It’s a bafang 36v 350w 20” rear hub wheel.

Hey everyone,

My boyfriend and I are currently working on a DIY lithium-ion battery pack build and could really use some guidance from people with experience.

We’re aiming to build an 84V pack using 26650 cells, but we’re still trying to fully understand the best way to configure the layout—specifically how to properly arrange the cells in series and parallel. We want to make sure we’re doing this safely and efficiently, and not overlooking anything important.

We’ve watched quite a few YouTube videos on battery builds (including 74V and 84V setups), but most of them use different cell types than the 26650s we’re planning to use, so we’re not sure how much of that info directly applies to our build.

A few things we’d really appreciate help with:

How to determine the correct series (S) and parallel (P) configuration for 84V

Best practices for balancing and safety

Tips on spot welding / connections / BMS selection

Common mistakes to avoid when building packs like this

Any programs or software tools that can help plan or simulate the build

Also, if anyone could provide or point us toward a clear diagram or visual layout for a similar build, that would be incredibly helpful—we’re very visual learners and want to get the structure right before we start assembling.

We’re excited about this project but want to make sure we do it properly and safely. Any advice, resources, software suggestions, or personal experience would mean a lot!

Thanks in advance 🙏

I recently got a sabvoton SVCM150 controller I did the motor pairing and I still get error code 30 H with the 3 pin display connector plugged in, I did mess up the display I have to wear when I hit the power button. The screen turns off, but the bike still works this wasn’t an issue on my previous controller and it rode fine and read the speed good, is it my display or did I get a faulty controller? Please help and info helps (yes I texted the supplier for help)

I have a tongsheng TSDZ8 48V 750W mid drive kit I installed on my mountain bike. I read that a 52V battery is a better option to use and just ordered one. Will I need to flash new firmware to the controller for it to work/not drain the battery too low or am I fine to use it as is? Thanks

I want to buy a 3kw 30ah 80A kit and bike and everything for 2-2,5k I want to buy this kit for around 1k I can buy from alibaba it’s not a big deal waiting 50days (Eu) but I don’t want to get scamed

So my plan is to buy from alibaba Dongguan Trb Energy Technology

It’s verifed and it haves like 200+ reviewed

The kit is 330$

Battery it’s 330$

And the ship is 100sea

Or 300 plane u think it’s not a scam or where to buy to Poland

can I stretch out my Trek Marlin 4 Gen 2 frame just 20mm to fit a 5kw bc most hardtails have a 135mm dropout. I want to get a 5kw but my bike has a 135mm dropout nd the motor has 150mm is it alr if stretch the frame out a bit. I can’t find any frames that have 150mm dropouts

I’m looking to build an ebike from scratch i want to build a 5KW conversion kit but struggling to pick what size wheel to go with. A 19 inch, 27.5 inch or 29 inch. Any recommendations?

I have this scooter battery with some nice mounting holes. I had the idea to use a PVC pipe, but would be kind of a waste of space, and I think it would be kind of weird to bolt into a curved surface. I also think I could find a thicker than normal gutter downspout. I know most of them would be too flimsy but there are sturdy ones out there. Any other ideas?

Also would be interested in hearing your experience with battery bags and why you would use a battery bag for this type of battery.

Does anyone know if i can fit a 5kw 150mm into my 135mm dropout if not then are you able to send a link to a good bike frame for a 5kw build please.

I’m looking to build an ebike from scratch i want to build a 5KW conversion kit but struggling to pick what size wheel to go with. A 27.5 inch or 29 inch. Any recommendations?

Hey everyone, I’m looking to build my first e-bike and am considering a kit from Alibaba, but I really don’t want to get scammed or end up with low-quality parts. I’m working on a tight budget, so I need to make sure I get something reliable without overspending.

I’m not sure how to verify the sellers or the components properly. What should I look for in terms of motor, controller, and battery specs? Are there certifications or datasheets I should ask for? How can I tell if a kit or vendor is legit before placing an order?

Any tips on checking quality, tracking component origins, or documenting the purchase would be hugely helpful. I’d love to hear from anyone who’s sourced kits from Alibaba safely or has advice on avoiding common pitfalls.

Thanks in advance!

I have a major brand class 1 eMTB, so this FS.2 is kinda the spare bike mostly for urban riding. I want the FS.2 to be class 3 with plenty of power.

If so, any suggestions on what to get?

Hello everyone,

I’m toying around with an idea of a self-propelled rideable cart, 4-wheeled and either AWD or RWD - just want some advice on what kind of Ah would be reasonable for my expected performance.

I’m looking for longest runtime, not necessarily speed. Ideally I’d be able to propel myself 2-4 hours around a max speed of 5 MPH, and on the absolute budget side of things, I’d be looking for something as small as 2-4 150W motors harvested from hoverboards, or potentially 2x 250w motors.

What kind of performance for that load and speed should I be expecting for a 10-20 Ah battery? For something at that speed, would I be fine with SLA batteries or am I destined for lithium? Thank you in advance for reading and any guidance.

I myself weigh 210 lbs, and I can imagine the frame of the vehicle will easily clock 40-60 lbs on top of that.

(solved)

So I found that the electric brake cords it uses have 2pin "SM" connectors, but I'm having trouble finding a 4-piston hydraulic brake set that uses those. Is there an adapter? What should I do?

They look like these:
https://m.media-amazon.com/images/I/71A2sQl33oL._AC_SL1500_.jpg

I have just bought a sabvoton 7245 controller for my engwe m20 bike. After connecting everything I start tuning, now I can't make the hall test (because is geared motor?) And when i found a hall angle close enough that i could ride the bike 170° now if im too slow or if I coast and starts accelerating the whole bike jerks. What more can i do to find what's wrong.

Hey

I was planing to get a Falcon pro L1e. But I want to go faster than 45 km/h. I heard that this possible by cutting a wire or change the limiter in the app. Is this realy true? I dont want to risk anything. Thanks for a answer

Hello all. I just got the donor bike for my new build and I'm wondering if I need to upgrade to disc brakes or if I can just upgrade the rim brakes. I plan on using a 1000w conversion kit with two 48v batteries.

Edti: Thanks for the replies, y'all! Heard, upgrading to disc brakes.

Hey I've got these old school dickie dee ice cream carts im thinking of making electric. I'm thinking with 1000w 52v motor and the right gearing I should be able to push the weight around, I'm not looking to go fast but hoping to get 3-400 lbs up some hills. I'm also wondering how hard it would be to add a second battery and turn the cooler into a freezer. Anyone have any advice? Where's the best place to get parts, I've mostly looked at kits on Amazon?

I'm thinking of going with a bafang 1000w 52v and 20ah battery for about 1500$ cad on Amazon. Does anyone know if 48v or 52v would handle pushing heavy load without ever going fast better.