Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Need a speedometer for little wheels

    Hey all, remember me? heheh. So I got a gas scooter just tonight off ebay and I'm lookin for a speedometer that will work with it's little wheels with only 80cm circumference (10in tall). Something must be around, anybody have an idea? I don't want to share my cyclocomputer on my bike with my scooter - it only goes down to a 100cm wheel size and I wouldn't want to mix my gas and bike miles anyways. Any finds?

    Don't take me wrong ... this scooter is never going to come close to replacing my bike. I love biking. I thought this scooter was cool so I got it. And I can fold it up, stuff it in a locker or something at school, and take it home (if I'm lucky, it's not very compact). Plus I can take it to work without getting all smelly. I don't mind getting smelly when I'm on my bike, but I bet the boss would when I arrive!

    http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3631886176

    Thanks all!

  2. #2
    sch
    sch is offline
    Senior Member
    Join Date
    May 2003
    Location
    Birmingham. AL
    Posts
    2,589
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    One simple solution would be to mount two magnets on the wheel, this would double pulse the computer and make it think the wheel was 2x as large, then
    enter a multiplier for a wheel 2x the size of your wheel. Just tried it with my
    road bike and speedo reads 6mph with one magnet, 12mph with two. Put the magnets 180 degrees apart on the wheel. Steve

  3. #3
    Burn-em Upus Icephaltus Gojohnnygo.'s Avatar
    Join Date
    Oct 2002
    Posts
    2,353
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    This should work.
    Accepts wheels with a circumference of 1 mm to 3999 mm or a diameter of .5 mm to 127 cm (50 inches). The wired model is often used for non-bicycle applications such as motorcycles, karts, mopeds, scooter, road equipment, etc
    You can find it here. http://www.branfordbike.com/computer/comp5.html
    Sick BubbleGum

  4. #4
    Senior Member DieselDan's Avatar
    Join Date
    Mar 2003
    Location
    Beaufort, South Carolina, USA and surrounding islands.
    My Bikes
    Cannondale R500, Motobecane Messenger
    Posts
    8,524
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Just roll out the wheels like a bike, then follow the directions to calabrate the computer.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  5. #5
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by sch
    One simple solution would be to mount two magnets on the wheel, this would double pulse the computer and make it think the wheel was 2x as large, then
    enter a multiplier for a wheel 2x the size of your wheel. Just tried it with my
    road bike and speedo reads 6mph with one magnet, 12mph with two. Put the magnets 180 degrees apart on the wheel. Steve
    lol ... no ... that would make it think that the wheels on the scooter has 1/2 the circumference. The ideal thing to do would have the speedometer pick up the magnet's field every other revolution, but that won't work unless I do some electronic work (and I don't want to cut up my probe). I could do that, but I'd end up with a permanent scootometer ... good thinking though ...

  6. #6
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DieselDan
    Just roll out the wheels like a bike, then follow the directions to calabrate the computer.
    The wheel's too small for the speedometer. Like, the 80mm circumference is beyond the lowest value of the cyclocomputer.

  7. #7
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Gojohnnygo.
    This should work.
    Accepts wheels with a circumference of 1 mm to 3999 mm or a diameter of .5 mm to 127 cm (50 inches). The wired model is often used for non-bicycle applications such as motorcycles, karts, mopeds, scooter, road equipment, etc
    You can find it here. http://www.branfordbike.com/computer/comp5.html
    Hey nice find! Thanks a lot!!

  8. #8
    sch
    sch is offline
    Senior Member
    Join Date
    May 2003
    Location
    Birmingham. AL
    Posts
    2,589
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    [QUOTE=jump]lol ... no ... that would make it think that the wheels on the scooter has 1/2 the circumference. The ideal thing to do would have the speedometer pick up the magnet's field every other revolution, but that won't work unless I do some electronic work (and I don't want to cut up my probe). I could do that, but I'd end up with a permanent scootometer ... good thinking though ...[/QUOTE/]

    Good thing I left physics for other endeavors.... Steve

  9. #9
    Senior Member JasBike's Avatar
    Join Date
    Jun 2003
    Location
    CT
    Posts
    496
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    you could just set it for a tire size 2x as big and figure half the displayed MPH? would that work?

  10. #10
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That would probably work, but that Panoram computer looks like the ticket. Plus I don't want to use my bike's computer for this, so I'd be buying another computer anyway. Might as well get a Panoram.

  11. #11
    Burn-em Upus Icephaltus Gojohnnygo.'s Avatar
    Join Date
    Oct 2002
    Posts
    2,353
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by jump
    That would probably work, but that Panoram computer looks like the ticket. Plus I don't want to use my bike's computer for this, so I'd be buying another computer anyway. Might as well get a Panoram.
    [QUOTE]Don't forget about the Sigma sport BC800 it's about half the price of the Topeak Panoram. http://www.branfordbike.com/computer/comp3.html#item2
    Sick BubbleGum

  12. #12
    Senior Member
    Join Date
    Dec 2001
    Location
    New Jersey
    Posts
    6,127
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have the best answer. Get yourself the Garmin GPS and the handlebar mount. This will set you back $175.00 bucks but the GPS will tell you the speed you're traveling plus a whole lot more. I use mine all the time when exploring the MTA system in New York City. I ride the tain all the way to the last stop and the GPS just takes me home!

  13. #13
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    [QUOTE=Gojohnnygo.]
    Don't forget about the Sigma sport BC800 it's about half the price of the Topeak Panoram. http://www.branfordbike.com/computer/comp3.html#item2
    Hey look at that one! It's worthy too ... not quite as dashboardy as the panoram, but 1/2 the price ... hmmmm ... got me thinkin now ...

  14. #14
    Senior Member jump's Avatar
    Join Date
    Aug 2002
    Location
    Bellevue, WA
    Posts
    107
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dahon.Steve
    I have the best answer. Get yourself the Garmin GPS and the handlebar mount. This will set you back $175.00 bucks but the GPS will tell you the speed you're traveling plus a whole lot more. I use mine all the time when exploring the MTA system in New York City. I ride the tain all the way to the last stop and the GPS just takes me home!
    Never thought of GPS! That would be really cool. But 175 ... I think I'd have to save up for that if I ever were to get it ... chuck-ching ... but it's like a probless one and can be used anywhere ... and it's cool ... well its another way the feds can track me down, booooo.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •