Garmin edge 705 question??

smithyt68i
smithyt68i Posts: 9
edited June 2010 in Road beginners
Hello,

has anyone had any questionable speed readings on there device?
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Comments

  • turbo_hamster
    turbo_hamster Posts: 122
    My Garmin 305 sometimes has fleeting moments of insanity. My top speed for a TT last year was 185 mph, according to the Garmin. It was a PB, but not that good a time!
  • teamtalairan
    teamtalairan Posts: 175
    No but I have had questionable calories. I'm not talking the usual problem of them just being 'generous' As I've set my user profile as 65% of my weight to average it out - I'm talking a sudden jump mid ride. Last night 950 odd calories on a 70 min ride I then looked back in my history and noted I'd apparently burnt 65,550 the other day on a 3 hr ride....! Hmmmm this is a new problem so not sure how much it will continue. Very annoying!
  • smithyt68i
    smithyt68i Posts: 9
    last night was the first time i have had any speed reading problems, was putting the hammer down on a decent and got a post ride reading of 51mph!! not sure it really was.
    exercise.png
  • sarkster
    sarkster Posts: 25
    Hi,

    My speed readings have proven to be both accurate and depressingly low on my 705 :D

    HR though seems to have a mind of its own. I was allegedly hammering out 240 bpm while rolling at a gentle 11mph last Sunday. :/

    I agree with above too, the Calories burnt seems way high - something to do with the more accurate algorhythms requiring a licence fee to be paid or something like that? I dunno.

    :D
  • bobtbuilder
    bobtbuilder Posts: 1,537
    The calorie algorithym is known to be way off.

    From memory, I think taking about 75% of the quoted figure is more accurate.
  • hazychris
    hazychris Posts: 202
    smithyt68i wrote:
    Hello,

    has anyone had any questionable speed readings on there device?

    If you're using the GPS to provide your speed readings then with the inherent error from GPS, and a short time between adjacent readings, you can get speed spikes. I found myself breaking the sound barrier on a turbo once :twisted:

    If you use the GSC-10 speed sensor, it isn't susceptible to such spike though.

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