Remove Speedlimit On Ancheer Speedrid Bike

[A J]

I have a fattire 26' ebike from ancheer/speedrid and I was hoping there was a way to remove the speed limit without swapping anything. the controller compartment is filled with grey goo and it tops at 22mph when the motor SHOULD be able to do 28mph and the P options menu is missing anything related to speed
MY BIKE DOESNT HAVE THE LITTLE GREY BOX BEHIND THE BATTERY

 

[RunForTheHills]

Can it do 28mph unloaded (lift the wheel off the ground)? If so, the controller isn't being limited by programming or the kv rating on the motor. The bike just doesn't have enough power to go faster. You should be able to go faster if you get into an aerodynamic position on the bike as wind resistance is the biggest factor slowing you down over 20mph or so.

 

[A J]

Can it do 28mph unloaded (lift the wheel off the ground)? If so, the controller isn't being limited by programming or the kv rating on the motor. The bike just doesn't have enough power to go faster. You should be able to go faster if you get into an aerodynamic position on the bike as wind resistance is the biggest factor slowing you down over 20mph or so.

No It Cannot the 28mph I mentioned is the theoretical max speed if unlimited

 

[fooferdoggie]

Put it in your car thats the best way to get it up to speed. you bought a really cheap bike feel good it can do 22mph without bursting into flames.

 

[RunForTheHills]

What you are claiming does not make sense. In most states, per law, class 1 and class 2 ebikes cannot provide motor assist over 20 mph. Class 3 ebikes cannot provide assist over 28 mph. In most of Europe, the maximum assist is 15.5 mph. In almost all cases, if the bike has a programmed speed limit to the assist, it will be one of those speeds. Not 22 mph. Therefore, it is something else preventing your bike from going over 22 mph. Most likely it doesn't have enough power to overcome the wind resistance after that, but it could be kv rating of the motor (rpm per volt). The power delivered to motor is determined by the controller current regulation, the battery voltage, and the battery C rating. Good luck!

 

[harryS]

The grey box behind the battery held the controller on earlier versions. They probably moved the controller to the battery cradle, where it's potted to prevent tampering.

If you installed a 25A controller in a grey box behind the battery, with a matching handlebar display, I expect you could get 24-25 mph. That's where my 48V hubmotor bikes go on throttle only, Upgrade to 52V for more speed. Not worth the effort and the money it would cost for the parts.

 

[spokewrench]

In 2022 I bought a Six Three Zero e-bike, advertised as Class 3, 28 mph. On some streets around here, that would be closer to the limit than Class 2. I thought that would be safer.

On a hill, I found that it put 500 watts on the wheel as advertised. However, where I regularly rode, I had to make a sharp turn between a stop sign and a utility pole while climbing 16%. Pedal assistance helps a lot in a situation like that. I discovered that Level 1 gave me 350 watts, or 70% of Level 5. That much acceleration was dangerous. I needed a password to check the controller settings. Contrary to the owner's manual, Customer Service said customers weren't allowed to know the password, and that it was a Class 2 bike, limited to 20 mph.

I intended to modify the bike to improve stability. Because it was unstable, I hadn't been over 15. I tested it. Sure enough, it topped out at 20. I hadn't asked about top speed, but Customer Service had spilled the beans. It was extremely difficult to repack it to ship back.

For many months, I kept checking the description at Amazon and at Six Three Zero's site. It kept saying 28 mph. Six Three Zero's business model was fraudulent advertising and major obstacles in the return process.

Maybe Ancheer/Speedrid has the same business model. I've cooled on Class 3. A bicycle has a short wheelbase and, if the seat is up for pedaling, a high center of mass. On the rough pavement around here, I'd surely be thrown on my face, sooner or later.

 

[Stefan Mikes]

Just to make it clear: Class 3 is not a promise that a given e-bike would actually hit 28 mph. It is a promise the motor would not be cut off before 28 mph. These are two different things. The Original Poster can select a descent and pedal there; the e-bike will achieve 28 mph and the motor will still be working before hitting that speed. However, it appears that all resistances (especially air drag) would prevent getting at the desired speed on the flat.

 

[harryS]

I trust Google AI to make better use of a bike speed calculator than me, as it has better understanding of the drag coefficients from sitting upright, and also more knowledge of tires. And Google says it would take 1123 watts to push that Ancheer to 28 mph.

A regular mountain bike would need 723 watts for 28 mph, but only 300 watts for 24 mph, WInd resistance is exponential.

 

[RunForTheHills]

I trust Google AI to make better use of a bike speed calculator than me, as it has better understanding of the drag coefficients from sitting upright, and also more knowledge of tires. And Google says it would take 1123 watts to push that Ancheer to 28 mph.

A regular mountain bike would need 723 watts for 28 mph, but only 300 watts for 24 mph, WInd resistance is exponential.

We might have scared the OP away. I don't know if I would trust Google AI. It's wrong as often as it's right. But I just checked the manufacturer's description of the bike and they make no claims of the bike being able to reach 28mph:

https://www.ancheer.shop/products/a...9mf5s305EwVO69EDqgaxz5LQTGT8u5ffJVMTgN_BDyPFs

【500W (750W PEAK) POWERFULL MOTOR】ANCHEER Speedrid electric bike equipped with high speed brushless motor, provides more power to your daily commute, a cruise on the mountain. Top speeds up 25MPH affected by weight, wind resistance, and Other Factors, it will get you there swiftly.

And the Grin Motor Simulator agrees with the manufacturer. I am not sure what motor is on the bike, but a 500W Bafang G60 never reaches 28 mph just due to the winding of the motor. I used a 48V 10AH bottle battery because the manufacturer says the battery is 48V 10AH.

https://ebikes.ca/resources/web-too...h&motor_b=MG60_500&batt_b=B4814_EZ&cont_b=C35

 

[PedalUma]

Technically any bike that does not have a throttle attached and that goes over 20 and less than 27.99999999 is a Class 3 bike when pedaled by someone aero, strong, and light. The low fruit are, the wheels, tires, swapping the cast iron crankset and ditching the pogo fork. I would look into Roval rims, with Onyx hubs, and 622 44 tires. A sealed bearing BB would also help. As would ditching the cast iron stem and bar. And maybe a Reynolds 631 frame like this one with a mid-drive.