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If you really examine how the belt drive to a Rohloff is geared which is usually about a 50% torque reduction (both to deal with the under-drive nature of Rohloff's planetary gearing and to save it from the full torque of the Bafang Ultra) you'll understand that you never really experience the...

Get a rear view mirror that doesn't stick out past your bar ends. That seems like a reasonable solution. I had a bar end mirror for a while but it got destroyed by hitting something as your described. I purchased a better design that was under the grip on the left side. The reason why bar end...

Is 4000 miles on a gear hub motor considered acceptable product life cycle? What is it about the ebike industry that can't seem to get past the mindset that bike are only for recreation / leisure riding and should not be more "transportation-grade?" If the ebike industry is really ever going...

I rode a motorcycle for many years and now ride an ebike frequently. I have always ridden assuming that drivers simply do not see me. That can dramatically reduce your risk on two wheels. I have friends that have been seriously injured in motorcycle accidents and I do believe they could have...

I think the fact that a growing number of brands are releasing "multi-mode" models (nothing preventing this) the classes become a very grey line since the rider can flip between them by simply hitting a button. I predicted this the very first time I read about the 3-class legislation being...

There are safety standards in 1512 that apply to both bikes and ebikes. Recently a new standard was created for the drive systems but I can't remember the document number.

This is why when Dr. Currie drafted the original HR727 federal ebike definition he defined a 750W nominal rating (knowing it was nebulous but would be OK with congress given he could say it's just 1hp). He then established a maximum drive system wattage above 20mph per the constraints so an...

We've all read about the EU 250W power rating / limit for ebike drive systems but the drive system do have higher than 250W peak power. I'm trying to comprehend what the legislation actually specifies.... Is 250W the peak power the motor and controller can provide without overheating within 30...

In a way this power discussion is what this post is about because it does explain why the class 1 and 3 results were about the same.

Having some ebikes that are truly effective urban mobility is a bit more important that just making them good for recreation / leisure riding. I understand that oil and auto industries don't want the competition but the world needs great human scale transportation solutions. An ebike is...

Does anyone have information on what the EU really allows for power rating / max power / etc? It's clear that HR727 in the US details that 750W is just a motor rating and not a max drive system power and focuses on restricting power per constraints above 20mph but everyone seems to have a...

Cool data, but if effective urban mobility solution is wanted I would think average speed would become more important and the rider exertion needed would also want to be reduced (assist can always be reduced to get more exercise). Personally I think the reason why the average speeds are not...

Seriously you want to just have the state recognize HR727 as a compliant bike. 3-class legislation is simply poorly thought out. It makes lawmakers feel like they are doing something but it actually is never going to enforceable (stickers really?). The CPSC requires LSEBs to be compliant to...

Most of these threads where riders are complaining their bike is too fast have an agenda ... which is what I'm accused of having frequently when I oppose that they ignore they can just ride as slow as they choose. They want EU like ebike laws where 15 to 20mph is max assist speed to be ridden as...

I did not write or work on HR727. You bring up consensus ... that bill passed one single vote short of full house and senate consensus. It is the definition that was a close to consensus as any of us will likely ever see and yet I'm made out to be the bad guy on many EBR threads because I...

If someone releases an ebike with a throttle that only function when the rider is pedaling is that a throttle or a PAS ebike? My only point is I have no clue why how the assist is regulated determines compliance for use by the 3-class system. I don't know of an example where a state has defined...

Why is favoring the 2002 HR727 some crazy agenda? The definition was written by a Phd Electrical engineer that understood the power / speed relationship better than me and everyone on EBR so I just think all us that want the best future for ebikes should consider understanding it and what the...

Yes Yes .... Far too many recreational trail / mtn. bikers keep throwing out opinions on ebike performance for urban use that they know nothing about. Many have said they feel their trail access could be taken away if the 3-class system was tossed out (HR727 intent was to define a Low Speed...

Obviously, I'm pretty passionate on the power/speed and regulatory aspects of ebikes. I don't have $millions$ to push regulatory capture like People for Bikes did to get the 3 class system adopted in so many states. I believe they had a hidden agenda while mine is simple and totally out in the...

I'm not endorsing anything. I'm just pointing out the huge impact hills have on top bike speed. Everyone seems so freaked out about ebikes assisting beyond 20mph when a 6% hill results in a coasting speed of 30mph. Just a fact that is totally ignored. Seems to me that limiting ebike assist speed...