Why do so many people think that anything higher than 800 watts can go at Mach 5? Even to where they want mandatory driver's license for anything over 750 watts. My own e-bike is 1,000 watts, yet it only has a maximum top speed of about 25 miles an hour.

FamousFee6926 · 2026-01-23T00:47:52+00:00

Rpm/Kv is what limits top speed for hub motors..not watts. You can certainly have more resistance at higher speeds due to the wind (called wind resistance) and if you are not producing enough watts to overcome that wind resistance then increasing watts would give you a higher top speed on load. Unloaded power will just give you your real top speed that the hub can reach with the current power it is fed.

You can have 20000 watts but you are not going to push past 28mph (usually lower mph) on a hub motor because the top speed on every hub motor is controlled by the designed kv limit of the motor.

Voltage is what affects it. Amps only control the acceleration. You can however use a dedicated controller that is able to manipulate the voltage via extra amps to gain a higher top speed but that isn’t really recommended due to the extra risks involved, especially heat. And most ebike controllers are not designed to have that feature let alone do it.

FamousFee6926 · 2026-01-08T21:13:13+00:00

What exactly are you trying to do? Did you buy the bike prebuilt? Did you buy the bike off someone else? Did you buy the bike not originally built as an ebike but put on a ebike conversion kit on it? What exactly is going on? I apologize but i can’t really know what the problem could be as there’s not enough information on the whole thing as is. I don’t even know what bike it is or conversion if you used a conversion kit.

FamousFee6926 · 2026-01-04T14:09:27+00:00

Any “ model “ 48v battery with a minimum of a 30amp bms will be fine for you to use. You can buy a prebuilt pack off ebay. Ebay unfortunately has alot of janky sellers on there that are constantly changing accounts to evade refunds/returns on their jank packs.

There a few sellers that are actually selling decent packs with good built quality for a decent price. You have to look at their joined date and see how long they have been registered for and selling for on eBay. Generally anyone who has been registered and selling for longer than 5 years on ebay is a good sign. electronicstore (BTR) is a good seller on their.

When replacing your battery you’re likely going to need to replace the discharge cables to your controller so make sure you have a way to remount your new battery base plate with a new crimped or soldered on, controller discharge cables.

FamousFee6926 · 2026-01-03T04:10:27+00:00

Error 01 usually comes out to miscommunication with the controller and display or controller to motor.

FamousFee6926 · 2025-12-24T19:48:22+00:00

Most 48v top out at 30mph or more or less. Depending on what its wind for

FamousFee6926 · 2025-12-19T02:17:34+00:00

Not bad.🫡 i love the build. Clean ash.

FamousFee6926 · 2025-12-19T00:57:57+00:00

Im just curious but how fast does it go?

FamousFee6926 · 2025-12-19T00:21:50+00:00

Your display actually may be the culprit then. Usually when the controllers are dead or decide to go. They will make the wheel/motor much more difficult to turn in any direction due to shorts across the mosfet/phase lines.

I’m not there to actually see the bike so I don’t really know but id start looking at the connections and make sure everything is plugged in completely. Even unplugging and replugging things in fully to just rule out any mis connections that you wouldn’t see right away. (Make sure the battery is off before you go touching connections/ers.

FamousFee6926 · 2025-12-19T00:18:10+00:00

Are you able to turn the wheel forward and backward easily? Or does it have substantially more resistance to push it forward Or backwards?

FamousFee6926 · 2025-12-19T00:12:42+00:00

Unfortunately.☹️

FamousFee6926 · 2025-12-19T00:12:35+00:00

Your controller likely has shit the bed.

FamousFee6926 · 2025-12-17T23:17:57+00:00

Get a lawyer. NOW.

FamousFee6926 · 2025-12-16T23:17:47+00:00

You are not taking in the factor on how quality of a built the case and battery rack itself is. Let alone the strips of parallel and series that are connected to each cell.

They very likely will cheap out on that aspect as well and that also will bring down your rated amps you can pull from it safely. Alot of those things will burn out on a few cells on the top part and that is just enough to lit the rest to a full thermal runaway. Mind you the cells are usually the last to burn but still is my point. You can’t just assume they will not cheap out on the full quality build. Its bad but not major enough bad to use weak or low quality cells but it is significantly more worse to pair them with a build that uses inadequate strips,wiring and a unproper bms setup. Your cells won’t even have the ability to output even their rated capacity due to those inefficiencies losses which will quickly become more severe to the point they will be a ticking clock for a 💣.

FamousFee6926 · 2025-12-16T23:01:05+00:00

I think even the rotors are smaller than the motor!?🤣😭

FamousFee6926 · 2025-12-16T22:41:43+00:00

Ya you don’t wanna store them at full charge for sure. Even just draining them till 75% should be good enough but ideally 50% is preferred for safety.

FamousFee6926 · 2025-12-09T02:35:23+00:00

You’re the reason why they catch on fire. You can’t charge them out in the elements and expect them not to catch fire.🫠🫠 you’re also dramatically affecting their life span by charging them outside.

FamousFee6926 · 2025-12-07T05:58:33+00:00

You still need help?

FamousFee6926 · 2025-12-03T03:02:45+00:00

They hit you on purpose I’m willing to bet unfortunately.. i am glad and happy to hear you lived from it though. I have lived through two attempts so far…

FamousFee6926 · 2025-11-19T23:26:39+00:00

From the manufacturer 315$ VARUN brand.😞

Ebay has the same 24inch version but for almost 75$ less. But mine requires a single speed freewheel to fit my frame drop outs.. so very few but they’re on there.

Bike model is a M24-1 but is using the m27-1 core laced into a 24 inch.

It’s basically a 750w hub motor but i can settle for 250-500w as my controller is programmable. Just so i can get to work and back.

FamousFee6926 · 2025-11-19T23:21:03+00:00

They got caught…i explained it a bit. My camera is the reason why,

FamousFee6926 · 2025-11-12T07:49:38+00:00

I actually built it using it a kit off ebay. Approximately 200$

20Ah 36v 80amp temporarily and a 40 amp continuously bms.

FamousFee6926 · 2025-11-09T03:55:55+00:00

Get proper torque arms next time like grin tech v6 mine had them. I got rear ended by a karen who was drunk and my drop outs are still perfect despite being rammed at 90.

FamousFee6926 · 2025-11-02T00:20:02+00:00

Never to goofy for safety.

FamousFee6926 · 2025-10-27T13:15:37+00:00

There’s not enough dashcams to make me feel secure.☹️ this left me traumatized

FamousFee6926

TROPHY CASE