[nether]

I say this as a proud Brompton owner, but to most people they're just weird. They're also a bit more expensive, you get less bike for a given amount. They're not that light. I often lock mine up outside because I don't want to a haul a 26 lb block up a flight of stairs.

No lock weighs 10 lb (you can read the article), and 20 lb is a pretty light bike. 3 lb lock for a 25 lb bike is more realistic (my roommate's 56 cm aluminum road bike is 26 lb).

[twic]

Even 3 lb vs 25 lb is the wrong comparison. Why does the weight of the bike matters? What matters is the total weight the rider has to move - which is something like 25 lb for the bike, 20 lb for a bag, and 200 lb for the rider themself. 3 lb is peanuts on that.