As an avid cyclist too, I think the biggest misunderstanding is you mentionned "trail", which you are probably confusing with "non paved path". That Bike Shaped Object mentionned up there would totally be destroyed in a few hours of riding any challenging trail at a decent speed. The fork would bend and lockup itself, the brake pads would be dead before reaching the bottom of the hill.
Another problem with buying such a lowend bike online is they are very often badly assembled. You might find quickly that it becomes noisy because some parts were installed without enough grease, or components may become nearly impossible to remove because of oxydation when it will become time to replace them, and it may just be unsafe because something hasn't been torqued to spec. I once had a thorough look at these kind of bikes and a sticker on the fork clearly stated it was not really rated to be used off road. Thanksfully the CE norms have been done so that bicycles do not explode on potholes filled roads so even a bike not made for off-road is made to survive common abuses on and off the pavement.
My biggest issue with these kind of cheap e-bikes with stupid barely functionnal gimmicks such as (badly) suspended fork and chinese low end electric system is they often turn very quickly to the landfill because something end up being non functionnal and the owner do not know how to fix it himself and which component to replace wit. So to the eyes of many what you really bought appears to be waste (or soon to be) which would have been better replaced by something that might last better. Take the same bike, replace the suspended fork with a steel rigid fork and remove the electronics and you have a bike that can be ridden for years with decent maintenance. But how many people will do that instead of sending it to the landfill and replacing it with the same shit when it gets to this point?
Having said that the good thing with cycling is you don't have to have the newest more expensive bike to enjoy riding and as long as you do it within the capabilities of the bike. And suprisingly a bike can be operated for long while being in a very bad state as long as speed is kept low, squeaking and grinding his way to your destination.
> "trail", which you are probably confusing with "non paved path"
This terminology difference might be meaningful in biking circles, but the places I go are designated as "trails" both colloquially and often by various governments.
> Take the same bike, replace the suspended fork with a steel rigid fork and remove the electronics and you have a bike that can be ridden for years with decent maintenance.
Wouldn't it be too heavy as a normal bike? From what I understand, ebike frames work out cheaper because they don't have to care about not making them heavy.
Well terminology is important depending on who you are talking to. Some governments may call that trail but riding down a black track at Whistler or Champery is different than just riding along on a non technically challenging gravel road/path. Besides, trail bike is a term used by the bicycle industry for a category of bikes that are much more capable than a cross-country mountain bike on challenging terrain and downhills while not being as much extreme as a Downhill bike with double crown forks which are pigs uphill.
As for your other question it really depends on the kind of e-bike.
Well integrated e-bike from bigger companies have the engine in the bottom bracket area so you can't remove that and the battery is usually so integrated inside the frame. Most cheap e-bike like yours, if it is the same as the one I see on the viribus website, are regular cheap alu frame on which they have strapped a battery on the standard 2 bolts usually dedicated for the water bottle holder cage and the engine is on the rear wheel. So the frame is pretty standard in that regard. Remove the battery and swap the rear wheel for a regular rear wheel and you have a conventional very entry level hardtail.
Another problem with buying such a lowend bike online is they are very often badly assembled. You might find quickly that it becomes noisy because some parts were installed without enough grease, or components may become nearly impossible to remove because of oxydation when it will become time to replace them, and it may just be unsafe because something hasn't been torqued to spec. I once had a thorough look at these kind of bikes and a sticker on the fork clearly stated it was not really rated to be used off road. Thanksfully the CE norms have been done so that bicycles do not explode on potholes filled roads so even a bike not made for off-road is made to survive common abuses on and off the pavement.
My biggest issue with these kind of cheap e-bikes with stupid barely functionnal gimmicks such as (badly) suspended fork and chinese low end electric system is they often turn very quickly to the landfill because something end up being non functionnal and the owner do not know how to fix it himself and which component to replace wit. So to the eyes of many what you really bought appears to be waste (or soon to be) which would have been better replaced by something that might last better. Take the same bike, replace the suspended fork with a steel rigid fork and remove the electronics and you have a bike that can be ridden for years with decent maintenance. But how many people will do that instead of sending it to the landfill and replacing it with the same shit when it gets to this point?
Having said that the good thing with cycling is you don't have to have the newest more expensive bike to enjoy riding and as long as you do it within the capabilities of the bike. And suprisingly a bike can be operated for long while being in a very bad state as long as speed is kept low, squeaking and grinding his way to your destination.