• Brompton M6L Weight Saving Project

    by  • January 29, 2017 • Cycling, Journal • 0 Comments

    Just under a month ago I bought myself a 2017 Brompton M6L, and I have to say it is incredible. Like most bikes however, especially one constructed of steel; it has a weight penalty. My configuration according to Brompton weighs 11.78kg, I don’t have any accurate luggage scales and Bromptons guide is meant to be pretty accurate so I will use that as the starting weight. This blog post will explore my progress in reducing that weight.

    In another blog post I talk about all the options and different ways to save weight, including those that can be done at the point of ordering the bike.

    The Luggage Block
    All Bromptons ordered from Evans Cycle come with the Luggage Block, most likely subtly suggesting people buy some Brompton luggage at the same time. I have yet to buy some; although will probably end up buying the waxed shoulder bag as it looks great, till then it can go.


    Weight Saving: 91g
    New Brompton Weight: 11.69kg

    The Pump
    Its always good to carry around a pump, the Brompton pump attaches to the bike. Take it off and store it in your bag is a sneaky way to save weight. Only do this however if you actually carry around a bike repair kit otherwise its pretty useless.


    Weight Saving: 92g
    New Brompton Weight: 11.60kg

    The standard Brompton seatpost is a large chunk of aluminium and perfect for reducing weight. I have the standard length seatpost with the new style stopper. Overall it comes in at 520g for the seatpost and Pentaclip.

    Brompton Seat Post and PentaClip

    I bought myself a Hylix Carbon Fibre 600mm Seatpost from eBay for £33. Its standard weight with saddle mountings is 237g even lower than the quoted 266g.

    Being 600mm long, its quite a bit longer than the standard 530mm seatpost, so I started off chopping off 3cm from the end, then chopped off another 4cm bringing it down to 530mm. Chopping off those 7cm saved 22g, bringing the new seatpost down to only 215g.

    Weight Saving: 305g
    New Brompton Weight: 11.29kg

    Next up will be the tyres and saddle!


    Software engineer. Tea drinker


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