GASBIKE SNOW BIKE CONVERSION KIT

Discussion in 'Spare Parts, Tools & Product Developement' started by JGH122, Mar 1, 2016.

  1. JGH122

    JGH122 Member

    Attached Files:


  2. David Bogle

    David Bogle Member

  3. Frankenstein

    Frankenstein Active Member

    I was personally very curious about this and it's actual usability. With half the gyroscopic forces keeping you up right now missing since you're using a skid you might have trouble balancing. Maybe if you put on a pair of mini skids on your boots you could pull it off in harder snow, but anything super fluffy will probably end the ride fast.
     
  4. Frankenstein

    Frankenstein Active Member

    Maybe very frosted grass with light snow cover it could be very effective on, but all your brakes are on that single small track on the rear... I wonder if you swing your back out if it would rip the track straight off..
     
  5. butre

    butre Well-Known Member

    this design is well established for dirt bikes. I don't see why it wouldn't work for bicycles either.
     
  6. butre

    butre Well-Known Member



    these people seem to have no trouble with it
     
  7. FurryOnTheInside

    FurryOnTheInside Active Member

    Conditions in the video are about as easy as they could find. They're going down hill on hard and even 100% smooth snow with not even a pimple sized bump in sight. He even has to take a chairlift to go uphill.
    I doubt that you would even need the "Ktrak" for such hard snow.. just downhill knobby tyres would do, I think. I certainly used to ride worse snow on a mountain bike, and could do jumps without snapping bits off.

    When I made a ski bob (unpowered) conversion kit for my 20" wheel freestyle bmx I made the rear skid the same shape at the rear as the original rear wheel, so that it would feel similar when landing jumps (touching down rear first). I thought it would slide easier if the middle of the rear skid was actually right underneath me too. Braking could be achieved by lifting the front so the pressure increased on the rear and it would sink.
    The front was just a downhill fork replacing the bmx fork so the pivot point for the front skid would be lowered and the suspension would help with the unseen bumps under the snow. I unfortunately didn't have the right springs to make the front skid return to a safe position when I lifted it so I was using bungees which weren't ideal.
    I wish I had pics so I wouldn't be trying to explain, but this was before (I had) digital photography.
     
  8. JGH122

    JGH122 Member

    This video shows it being used in deeper snow
     
  9. JGH122

    JGH122 Member

  10. FurryOnTheInside

    FurryOnTheInside Active Member

    Thanks for the video that was very funny. I can see that you would be much better off with a 5" tyre fatbike unless you really really love eating snow. :p
     
  11. Frankenstein

    Frankenstein Active Member

    Maybe the rear track would stay, but no the skid is just not happening, I would say 4 inch wide knobby tires would be just as good with slightly more predictable handling would be better.

    He probably can't pedal fast enough up hill to stay upright
     
  12. JGH122

    JGH122 Member

    I think that with a 2 stroke with a jack-shaft setup for low gearing on a 7 speed cassette you would simply terrorize the country side.
    I bet you could do 20+ mph in fairly deep snow with a 5 HP 2 stroke.(unless you have a 300 lb ass)
    A 5" fat bike tire does not come close to the surface area of this thing providing lift on the snow.
    You get that thing in the right gear with a 160 lb rider and it will be a 7' high rooster tail of snow coming out the back.
     
    Last edited: Jan 14, 2017 at 11:15 AM
  13. Frankenstein

    Frankenstein Active Member

    Your opinion, which is fine, I rode snowmobiles and bikes and motocross all in snowy conditions. It looks like an idea that is only for the most dedicated of riders. It would be easier to strap my bike to the back of an atv or snowcat.
     
  14. JGH122

    JGH122 Member

    ATV's and SnoCats are ok if you got nothing but money.
    I live north of 52 and its snow here 6 months out of the year.
    You seem to base your opinion on the notion you are only going to peddle the thing.
    I base my opinion on "I do not intend to peddle" the thing at all.
    There is a big difference.
    The thing never took off because its tough to peddle.
    I do not want or need to peddle it.
    That is what they make motors for.
    Nears as I can see it has around 70-75 sq. inches of track floatation.
    A 5" fat bike has maybe 15" to 20" sq. inches floatation.
    Anyone with a fat bike better be prepared to do a lot of grunt work to go through any amount of snow.
    And I'm just talking about the rear wheel.
    That is why quads are useless in in snow more than 1 foot deep even though the got really "fat tires".
    I ought to know my first sled was a brand new 1969 SkiDoo Olympic 335
     
    Last edited: Jan 14, 2017 at 1:24 PM
  15. mikemarley

    mikemarley Member

    theres a vid on youtube of this guy using a motorized ktrak. its got a jackshaft setup on it too.
    personally i planned on putting it on my skyhawk with my 12 hp reed engine and do a single speed 40 tooth sprocket on a disc biscuit setup. id also put a surly single speed cassette on it for the pedal side. had this picked out for winter but there wasnt enough snow this winter unfortunately lol
     

    Attached Files:

  16. JGH122

    JGH122 Member

  17. mikemarley

    mikemarley Member

  18. JGH122

    JGH122 Member

    Now that's more like it! Nice!

    Check this...
     
    FurryOnTheInside likes this.
  19. Frankenstein

    Frankenstein Active Member

    Oh yeah nothing but money lol great one.

    Track set up for bike - 350

    Jackshaft - 200

    Snowmobile on Craigslist needing a replacement carburetor - 250

    80cc quads in working used condition on Craigslist - 200

    Box of welding rods and a bunch of old parts - practically free
     
  20. JGH122

    JGH122 Member

    Old snowmobiles and 80cc quads are nothing but money pits.
    That old $250 sled will cost you a $1000 before you got 200 miles on it.
    You will be towing it home more than riding it.
     
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