The posted weights don't really matter. I am sure that when you actually get the bike and put it on the scale it will weigh more than the posted weight.

I have lightened my old steel bikes in many ways by modifying the seat posts, cranks, and forks. The biggest changes on the ride/weight of these bikes was when modifying the wheel set. And as far as the wheel sets go,, other then steel v/s aluminum, the biggest change in ride was the tire and the tiers structure. Not the weight?

Of course this applies to my steel framed pre 90's bikes. I don't know how it applies to alloy and carbon millennial and post millennial era bikes.

Off Post: That brings up another thought. Just what is the life span of some of these newer production bicycles. Is the life expectancy of its components greater then the life expectancy of the frame and structure? I am thinking that the quality and life span of a new bikes wheel set is very, very, important. Or on a cut rate deal the first thing I would replace...

Edit - Rats... Sorry, I thought you were talking about bicycles, not e-bikes... Duh...