The importance of weight depends on the geography. I cycle 3 miles to the office each way but there are a couple of steep hills on the route, and I would dread

The importance of weight depends on the geography. I cycle 3 miles to the office each way but there are a couple of steep hills on the route, and I would dread it if my bike weighed much more than 10kg. Some of the bikes shown in the video look like they could weigh twice as much.