Berk has built one of the world’s lightest road bikes that, unlike many featherweight bikes, gives up little in terms of usability. The Slovenian brand has exclusively shared details with BikeRadar on how it created this mind-blowing 3.9kg road bike.

    The bike was intended as an in-house project to test the limits of what Berk can produce. The result is a sub-4kg bike that can be confidently ridden daily.

    That last point is the key one – according to the Slovenian brand, it would be relatively easy to produce a considerably lighter bike but the brand’s mission is to build truly “lightweight yet reliable parts”.

    Berk also wanted to illustrate that, while the rest of the industry has been focussed on advancements in aero and disc-brake technology, there are still significant advancements to be made, and public interest, in lightweight technology.

    We can’t help but agree – aero may be fast but there’s little that stirs our weight weenie loins quite as much as the sight of a true featherweight build. Anyone who’s tuned in to BikeRadar’s Hill Climb Diaries will know as much.

    Find out more at BikeRadar: https://www.bikeradar.com/news/lightweight-berk-road-bike/

    The Instagram account: https://www.instagram.com/ales_arnez/

    Find out more about Berk: https://www.berk-composites.com/

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    43 Comments

    1. I am so sorry guys :(. I was looking really hard at the thumbnail and I think I broke the frame. What was the maximum rider weight limit again ?

    2. Before I set off, I always find that a haircut, shave and a piss as well as only wearing a jock strap really lighten my Rayleigh Chopper. If I’m going for a really serious ride out, I remove the tyres, brakes, seat and handle bar grips-goes like a rocket!

    3. These builds serve no other purpose than flexing. That's an unusable bike, both in terms of maximum rider weight, and long term reliability (assuming you're light enough to actually ride it)

    4. For reference, if any of you watching this are parents, remember when you gave birth to your child, yep, thats how heavy this is

    5. I'm 198lbs so I'd be nervous even trying to ride a bike at the UCI limit, much less this. I've got 158 grams to lose and mine will be under the 16 lb mark, but even then I'm a bit nervous for longevity. Love seeing what's possible though.

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