My Bfe frame weighs 5.4 lbs (quoted). Probably one of the most do-it-all frames around. Light enough for big rides, yet doesnt feel unstable and is very tough.
A build with Wotans and burly rims, sticky tyres, dropper post, chain device etc was ~33lbs. Great fun on the downhills, but overkill really.
Just revised and rationalised it – now its ~26/27 lbs without the dropper post (havnt quite finished bike yet to weigh), with 140mm Revs, 2.4″ tyres… i expect its a lost a little bit of its stability, but gained a lot more agility, and should be much less of an arse to drag up a hill.
I seriously doubt I could EVER break the frame.
Its all in the build. A soul would be a pound less with the same build, but I couldnt run a dropper post as easily for more techy riding (and its £200 more!). A change of the relatively old and chunky EA50 bars and onone 456 stem in a few months will see a bit more weight off as well
Its all bikes.
Tim