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  1. #1
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    OK, It's Not Really a Bicycle...

    but holy cr*p is right!



    from French Daredevil Rides Rocket Bicycle at 163 MPH
    Attached Thumbnails Attached Thumbnails OK, It's Not Really a Bicycle...-rocket-powered-bicycle-francois-gissy.jpg  


  2. #2
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    I suppose disc brakes were ditched to save weight, but I wonder how hot the rims get braking from 160 mph. That looks like a 20 tooth chain wheel likely for the same reason. No aero rims and fat tires, though. maybe they tested other tires for speed tolerance. I don't recall seeing speed ratings on bike tires. Good upper body strength appears to be essential to keep this crotch rocket underneath the rider as his legs are trying to drag him off.

    BrianMc

  3. #3
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    Yeah....OK.....

    I bet they paid a lot of attention to the tire choice, at least they should have. Too bad they didn't post the bloopers where the bike took off without him, before they figured how how long they had to lengthen the wheelbase.

  4. #4
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    Quote Originally Posted by BrianMc View Post
    I suppose disc brakes were ditched to save weight, but I wonder how hot the rims get braking from 160 mph. That looks like a 20 tooth chain wheel likely for the same reason. No aero rims and fat tires, though. maybe they tested other tires for speed tolerance. I don't recall seeing speed ratings on bike tires. Good upper body strength appears to be essential to keep this crotch rocket underneath the rider as his legs are trying to drag him off.

    BrianMc
    Probably once run per wheel set
    While good body strength is obviously required....he does have a butt pad to absorb most of the accelartion gs that have to be preety insane.

  5. #5
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    Quote Originally Posted by BrianMc View Post
    That looks like a 20 tooth chain wheel likely for the same reason.
    I don't understand it at all.

    Why start the build with a walmart bike? Why leave the rear derailleur on? And if you leave the rear d on, why mess with the cassette and chainrings? I wonder how the freewheel handled 160mph?

  6. #6
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    There is no figuring out crazy, I guess.

    BrianMc

  7. #7
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    Quote Originally Posted by newfangled View Post
    I don't understand it at all.

    Why start the build with a walmart bike? Limited budget?
    Why leave the rear derailleur on? How else to change gears?
    And if you leave the rear d on, why mess with the cassette and chainrings? So you can go to a lower gear for the uphills.
    I wonder how the freewheel handled 160mph? Badly I'd imagine.
    The ridiculousness of cycling clothes increase exponentially in relation to the distance from your bicycle.

  8. #8
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    I hit 48.7mph this morning. I'm sure I could have broke 50 if I wasn't wearing a parachute wind breaker.

  9. #9
    Unhinged Aussie on a 29er
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    I always get a chuckle out of seeing people strap motors to bicycle frames, because the very first motorcycles, e.g. the first Indian motorcycles, were reinforced bicycle frames with engines mounted in the main triangle.

  10. #10
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    Interesting! Tho I ended up paying more attention to the (possible) Subaru that followed.

  11. #11
    Unhinged Aussie on a 29er
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    Quote Originally Posted by MaddCelt View Post
    Interesting! Tho I ended up paying more attention to the (possible) Subaru that followed.
    I'm pretty sure that was an Impreza. Those boxer engines have a very distinctive sound.

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