Fatbike Fine-tuning- Mtbr.com
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  1. #1
    mtbr member
    Reputation: druidh's Avatar
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    Fatbike Fine-tuning

    I’ve been riding the Fatbike for a couple of months now, getting used to the handling over various types of terrain. The Husker Du tyres I’ve recently fitted seem to match it really well and it feels very capable over most surfaces. Dirt, gravel, small rocks are easily rolled over. However, I’ve been having some problems descending over rockier tracks. The problem is that the little “suspension” there is derives from the tyres themselves, running at somewhere between 8 and 12psi. While it will take a couple of boulders in its stride, things start to get out of control a little when the rebound of the tyre starts making the bike (especially the front end) too lively.

    Of course, there isn’t really any way to control/damp this rebound....
    .... or so I thought.

    What I sussed out is that I could improve the performance of the “suspension” by using a different, more dense gas. With the help of a car-mad mate, I managed to fill the tyres with some Nitrous Oxide. What a difference this has made. The tyres deform less over rocky terrain and thus I get less rebound from them. This has got me to thinking – what other relatively available gases would it be worth trying??

  2. #2
    A Surly Maverick
    Reputation: Dr Feelygood !'s Avatar
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    I think that has to be a 'first' on the FBF

    Good for you thinking and trying stuff 'outside the box'.
    Life IS a Beach and then you Corrode :)

  3. #3
    nvphatty
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    Quote Originally Posted by druidh View Post
    What a difference this has made. The tyres deform less over rocky terrain and thus I get less rebound from them. This has got me to thinking – what other relatively available gases would it be worth trying??
    helium??

  4. #4
    mtbr member
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    Methane. I have plenty that you can have for free.

  5. #5
    nvphatty
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    Quote Originally Posted by SmooveP View Post
    Methane. I have plenty that you can have for free.
    thats not right

  6. #6
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    Quote Originally Posted by nvphatty View Post


    thats not right
    And I thought my girlfriend's mom was the only person who doesn't like fart jokes.

  7. #7
    mtbr member
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    Only i am awake enough at this hour to check the calander
    plan it...build it....ride it...love it....
    http://coastkid.blogspot.com/

  8. #8
    mtbr member
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    Quote Originally Posted by coastkid71 View Post
    Only i am awake enough at this hour to check the calander
    got me. I was digging my university notes and trying to work out why it would make a difference whilst simultaeneously wondering whether nitrous oxide would make the tubes perish!!
    If you need me I'll be at the bar

  9. #9
    Human Test Subject
    Reputation: Volsung's Avatar
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    I'm gonna breathe the air out of your tires if I ever find out where you live.

    If you wanted them to deflate less when you hit things, couldn't you just increase the air pressure or does this gas behave differently?

    Water might be kind of a neat idea too.

  10. #10
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    What's the gas that comes out of cows ? Mixed in with that other stuff that's called er .... ******** ! thats the stuff :-)

    I'm off up the Mersey in search of snow

  11. #11
    mtbr member
    Reputation: Velobike's Avatar
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    This is probably going to get a life of its own. Watch out for seeing this passed on as 4th or 5th generation fair dinkum advice.

    However it's well known that to get maximum "float" the NO2 should be inhaled rather than put in your tubes.

    Well done druidh! I spent a few puzzled moments trying to nut it out - I knew it was wrong, but it came from a credible source not known for exaggeration, so it had to be considered. Brilliant gotcha.
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  12. #12
    chaindriven
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    Another option

    Try propane - it's a blast!

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