r/hyperebikes

Qulbix Q140MD built from the frame up, including the battery

30Kw peak

96v 42ah molicel P42A

Tuned fastace fork with skf seals and 50lbs spring

16/19 wheels

I 3D printed a lot of parts for it, such as the controller box for waterproofing, bashguard, mounts for lights, display mount, charging port, etc.

It's sooo silent, almost like a hub motor bike, and stupid fast.

With street legal mode 25km/h 250W

Off-road mode 80km/h 5000W

Assembled in Georgia🇬🇪

We are doing frame sets with custom tuned motors, controllers and software ⚡️

I didn't like the clamps so I welded the tabs to the frame. Yes I got more to work on but this post is for torque arms.

Quick question about torque arms. I know the stock torque arms that come with these kits are crap but i heard if you bolt them in their allright. Will this work if i drilll it a hole in the torque arms and bolt it in? I have two grin v6s on the way but i want to be really safe cause its an aluminum frame. Its 3000w 60a should i put two torque arms on each side? and i was a little concerned about the washer layout bexause then main phase wires seem to be in the way

I am doing some testing on my bike. I set 80 line amps/250 phase amps/0(max) field weakening and 100% speed ratios beyond my rpm limits.

Why is the phase showing lower than the line current on acceleration?

Hey guys, I’ve recently upgraded my stealth to qs205 and fardriver 72480. 100amp NBpower battery.

When I run the motor, once the wheel comes to a stop, it has this wierd deep whine or whir from within the motor. In the clip it lasts for half a seccond but one of the times off camera it was whining indefinitely until I pulled the power?

What is up , is something broken or breaking, is this Normal and do I just leave it.

Any and all help including reading up until this point is genuinely appreciated.
Thank you 🙏

I have tried the following:
- I’m pretty certain it is an electrical fault and not a mechanical one (or it’s just fine to do this)
- field weaking set to slow and low as per AI advice
- max speed and rated speed set to 900 and 870.
- EABS turned off
- I have auto learned a few times

i have a bonnell 775 mx that is not working if anybody could help me solve this issue much would be appreciated.

Whenever the bars turn the bike shuts off

I am absolutely loving this thing. was wondering if it is time for a new chain or should I wait until it’s fully stretched out? Also, anybody know how to adjust the rear shock? When I sit it compresses some and changes the chain slack by a lot. Thanks! If you have any questions about the cosmetic mods, lmk !

Hi everyone,

I'm currently converting a Mondraker Foxy Carbon XR 2019 with a mid-drive motor and I'm looking for someone who can build a custom-shaped battery pack for the frame.

I already ordered the a battery (52V / 10Ah / ~520Wh) as a temporary solution, but because of the unusual frame geometry there is quite a lot of unused space. Therefore I'd like to have a larger custom battery built over the winter.

What I'm looking for:

• Voltage: 52V nominal / 14S lithium-ion
• Capacity: ideally around 20Ah / ~1,040Wh
• Configuration: preferably 14S4P with 21700 cells
• Cells: high-quality branded high-current cells, e.g. Samsung 50S or comparable
• BMS: high-current BMS, ideally around 60A continuous discharge
• Peak current: should be suitable for the X1 Pro at high power
• Connector: XT90/XT90-S
• Charging: preferably removable battery with external charging connector
• Battery must be removable from the bike for charging
• Custom enclosure: shaped specifically to fit the available space inside the frame
• Approx. available depth: around 80–100 mm
• Waterproof / splash-resistant construction would be preferred.

The available side profile is roughly trapezoidal/triangular rather than rectangular. I have already made a physical template of the available frame space and can provide exact measurements, photos and a 1:1 template to the builder.

My current estimate is that 56 × 21700 cells (14S4P) should be possible, but I'm completely open to a professional battery builder suggesting a better cell layout or configuration.

Safety and build quality are more important to me than squeezing the absolute maximum capacity into the frame. I'm specifically looking for someone experienced with high-power e-bike batteries, proper cell interconnection, insulation, BMS integration and mechanically secure construction.

Location: Vienna, Austria.

Ideally I'm looking for a builder in Austria or Germany, but I'm also interested in reputable builders elsewhere in the EU if shipping a custom lithium battery is possible.

Does anyone know a company or experienced professional who builds batteries like this?

I'd also be interested to hear what capacity you think would realistically fit into this space.

Thanks!

398 Miles on it so far

This is my official entry for r/hyperebikes
-72v 24ah (180c 210max) hotpaxx
-FarDriver nd72450
-sotion fw23
-14” magwheels
-DNM adjustable rear shock
Too speed ≈80mph (could me tuned faster)

It was like the sky was on fire, it was insane.

Bike specs for those who care:

72v 3kw motor from NBPower running an 80a controller they included, so 5kw.

72v 20ah Amorge battery with Eve 50PL cells, capable of 200a continuous 240a peak.

Eventually I plan on getting a Fardriver ND72360 and Statorade to push this build even further, but so far it's a ton of fun. Hit 95kmh the other day, downhill with wind at my back. Normally I get 80-85kmh flat ground.

beginner pls help. I have the mechanical know how just unsure what I need to mechanic on. thanks in advance.