a good speedometer?

Discussion in 'General Questions' started by metalzombievi, Aug 27, 2015.

  1. metalzombievi

    metalzombievi Member

    ive bought 2 different speedometers, less than $20 for both with shipping. one was analog and other was electronic. the electronic one never worked well (kept jumping to different numbers, id be going about 15, it would say 15 then 46 then 80 then 0 and would jump around.) the analog one i broke because i was going too fast. i had the needle doing full circles

    does anyone know of a realy good and reliable speedometer/odometer that hopefully is less than $50?
     

  2. butterbean

    butterbean Well-Known Member

    Yep, buy a smartphone handlebar mount, preferably a waterproof one, and download one of many free speedometer apps to your smartphone.
     
    stewyou likes this.
  3. crassius

    crassius Well-Known Member

    I think the smartphone thingie exceeds the $50 target.
     
  4. 2old2learn

    2old2learn Member

    I'd suggest going to a local well known bicycle store thats been their for 5 years or more, and tell them the issues you've had with the other units you've tried. Get them to select the one you should get and let them install it. You'll pay more, but you'll get a much better unit, that works, and that they will stand behind. Then if they solve your issue, try and support them with your parts purchases from time to time and refer others to them so they can stay in business for all the cyclists in your area. I personally practice this and from time to time I'll ride with them on one of my road bikes and also ride with them as a Domestique on my motorized bike by dropping back to the support vehicles to load up on water or food to hand out to the riders on some of their century rides, vs having a car try to get in close enough to hand off things to riders in a crowd. Much safer for a bike to be riding among bikes to do this. This promotes cycling in general and introduces MAB's to people who already have a love of cycling. We should not try to alienate ourselves from the spandex crowd, they are potential advocates for our sport and possible future MAB owners.
     
  5. metalzombievi

    metalzombievi Member

    do any of those speedometer apps work with out any internet or wireless data being used? my data is limited so i save it for emergencies like if i get lost.
     
  6. darwin

    darwin Well-Known Member

    Check out German bicycle speedometers. They run from the axle but are accurate and long lasting.
     
  7. 2old2learn

    2old2learn Member

    Try turning off your cellular connectivity and load your mapping software and see if it can provide you with speed and timer data.

    You might shop around for a GPS unit or a GPS watch as they can provide you with speed data very accurately and they don't need any data access
     
  8. butterbean

    butterbean Well-Known Member

    Not if he already has a smartphone, which many people do. I got a waterproof cellphone mount on eBay for $10 with free shipping from a US seller, and the speedometer app I downloaded was free. You just have to remember to take the phone off the bike when not riding so it doesn't get stolen.
     
  9. butterbean

    butterbean Well-Known Member

    The mapping software doesn't provide speed or any other data besides location, directions and estimated time of arrival, requires a data connection to work. Cellphones actually have two different gps chips in them, one is hooked to the phones radio and thus only works with a data connection. This is the chip that is accessed by the mapping software, thus mapping software does not work without a data connection. The other chip is a standalone gps chip, which is accessed by the speedometer and other 3rd party gps apps, works without a data connection.
     
  10. butre

    butre Well-Known Member

    find an air speed meter instead of a land speed meter. don't have to worry about calibration, vibration, or emf interference then
     
  11. 2old2learn

    2old2learn Member

    The challenge with an air speed meter is that it will be influenced by the general wind conditions. Imagine sitting at a stop sign with a 20mph wind blowing in your face and looking down at your speedometer and seeing it showing that you are driving at 20 mph. Now your common sense of the world would tell you that you are clearly not going 20 mph.

    The best solution would be to use your smart phone. If you get the right software you should be able to just use the GPS data to show your speed and your time with very little or no data usage.
     
  12. butterbean

    butterbean Well-Known Member

    All the gps speedometer apps work without a data connection. I have a spare smartphone that my dad gave me and the service has not been active for quite some time. The speedometer app recognizes around 20 different satellites. I've also had other phones without active service that speedometer apps still worked. I pretty much explained all this already.
     
  13. 2old2learn

    2old2learn Member

    Good verification butter bean. I've not tried that with some of my old off line phones. Hopefully he'll take your advice as the phone is his best option since any of us on these MAB's need to have a communication device with us for safety's sake if for no other reason.
     
  14. butre

    butre Well-Known Member

    if the wind is that bad you're riding slow anyway. generally you can expect +-10 mph, which is no worse than most cable operated mechanical speedos
     
  15. butterbean

    butterbean Well-Known Member

    A speedometer that is 10mph off is simply unacceptable to me. In fact, anything more than 2-3mph is completely unacceptable. The best way I know of comparing accuracy is by knowing your gear ratio and rpm, and finding out what your top speed should be, then comparing your actual speed to that. On my last bike, I was geared for a top speed of 32 based on another forum members educated guess of the max rpms of my engine, a 97cc four stroke minibike engine (flathead). I was able to customize my gear ratio, so I geared for a top speed of 32. Using my smartphone as a gps speedo, my top speed was consistently 32mph and I tested it several times. So I would say its quite impossible for it to have been off by more than 1-2mph. I simply would not accept a discrepancy of 10mph. Never heard of an air speed meter before, but if they're that inaccurate, I know beyond a doubt that I will never use one myself.
     
  16. butre

    butre Well-Known Member

    personally I just have a tachometer and know what RPMs correspond to what speeds. I wouldn't even have that if I didn't have a bike that could break the speed limits on the main roads.
     
  17. butterbean

    butterbean Well-Known Member

    I have a mount for a smartphone and a tachometer. Since I'm building a new bike and using an engine I've never used before, as well as different gearing than my last bike, I want to be able to compare my speed against my rpms to make sure that my top speed is correct according to my gear ratio and my rpms. Once I've ridden the bike for awhile, the speedo won't be as necessary except for at night when I can't see my tach. Just because having an accurate speedo isn't as important to some doesn't mean it's not important to others.
     
  18. metalzombievi

    metalzombievi Member

    ive been looking at the speedometer/odometers online, does anyone know of a simple reliable 2 function wireless speedometer/odometer? i dont need 15 or 28 functions. the analog speedometers dont last, ive gone through 2 in a week (broke one going too fast and the other, the odometer is stuck).i only have 1 gig of wireless data shared between 3 phones so no apps that use data can be used.
     
  19. butterbean

    butterbean Well-Known Member

    The speedometer apps don't need data. Turn mobile data off when using as a speedo. This is my 3rd time explaining this now.
     
  20. metalzombievi

    metalzombievi Member

    is the app free? which app?
     
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