Metric Conversion Speed Trick, 20 to 28mph

[PedalUma]

If your bike is PAS governor limited to 20mph you can make the new cap 28 by using the metric conversion trick; taking it from Class 1 to make it Class 3. Let's say you have a display such as this: https://e-glidebike.com/images/sf-manuals/e-glide-SF-LCD-Manual.pdf. Kilometers are 40% smaller than Miles. 60 mph is 100kph. Reset the display to km from miles. Then reset the wheel diameter setting to 40% smaller. So, change a 26in wheel to 16 inches. Now your display will show that 25kph is actually traveling at 25mph, 40% faster. 20mph x 1.4 = 28mph.

 

[Old-tool-guy]

So my class 3 bike … if i do the same procedure will it go faster than normal class 3?

 

[RunForTheHills]

That depends on the controller and battery. Some class 3 ebikes can't even do 28 . They just don't have the power to do it.

 

[PedalUma]

So my class 3 bike … if i do the same procedure will it go faster than normal class 3?

@RunForTheHills is correct. If the amps are limited and cannot be changed, like 10 amps X 48V = 480W, you are stuck there. The same with a mid-drive and gearing if you are spinning out, you would need a larger chainring but might lose offset and climbing gears. If you do it, keep a log of steps you take so you can always go back. Also see if you can revert to factory default to start all over if you somehow mess up, so you can get back to home plate.

 

[Gionnirocket]

I hate s*it like this... Just buy a bike that does what you want.

 

[Old-tool-guy]

I hate s*it like this... Just buy a bike that does what you want.

Sorry to have bothered you karen.

 

[fooferdoggie]

Sorry to have bothered you karen.

kiss and make up you two and no tongue.

 

[Stefan Mikes]

A speed derestrictor is an easier solution, and the data reported on the display are correct. Just saying
As @RunForTheHills said, the actual speed achieved depends on the motor power but also on the e-bike type. A drop handlebar is aero and facilitates hitting the high speed while the flat bar aerodynamically drags the e-bike as much as the achievable speed is some 22-23 mph unless a high power motor is used.

The trick as described by Uma might work for cheap Chinese e-bike motors but will not work with anything a little more sophisticated.