Home Forums Bike Forum J shaped cranks

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  • J shaped cranks
  • natrix
    Free Member
    paton
    Free Member

    If they were yellow and plant based…..

    thols2
    Full Member

    Does that article have a shipping date?

    footflaps
    Full Member

    Would be quite cool to turn up on a club run with a set on the bike….

    mert
    Free Member

    Looks like the company that made them has gone under, they spent a while spamming forums about 6-7 years ago, with lots of scientific data to back it up.

    fooman
    Full Member

    This is real mind you can buy them on AliExpress with a 20% power saving why don’t the pros use them?

    Pedal Power Saver

    footflaps
    Full Member

    Isn’t that just a dynanic crank length changer, longer at the bottom, shorter at the top?

    Same idea as oval chain rings.

    JAG
    Full Member

    Hmm it’s an unusual date to be launching such a strange product – don’t you think?

    mert
    Free Member

    Which one?
    The PMP L shaped cranks have been around since the 80’s.
    The j shaped ones about 6 or 7 years (i’d have to check, but i can’t be bothered).
    The wobbly crank things i’ve seen several times, usually for people with mobility problems.

    JAG
    Full Member

    Hahhaha OK

    I’d assumed it was an April Fool’s joke :o)

    finephilly
    Free Member

    It’s a classic.
    Like no-one really uses oval rings ‘cos they feel weird.
    Same applies to that pedal attachment, any big deviation from circular motion just feels weird when you’re pedalling at 90rpm.
    Works for hand cycles, though (all the power is concentrated in 30-40% of the stroke).

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