Chris NewbyFraser Posted December 17, 2015 Posted December 17, 2015 I just bought a second hand 'GPS'. The Mio (Magellan) Cyclo 105. It comes with a speed sensor based on the old fashioned spoke mounted magnet and fork mounted sensor. HUH? I thought a GPS did not need this last century component. My cheapie Ryder 20 didn't have one! Does anybody have an explanation of why this thing has to use vulnerable and outdated piece of componentry.. Can I bypass it?
Thor Buttox Posted December 17, 2015 Posted December 17, 2015 My garmin also came with a magnet speedo. I never use it. There is a setting for using external sensors that you just disable.
no calves Posted December 17, 2015 Posted December 17, 2015 guys.......think about this one.... INDOOR TRAINER
no calves Posted December 17, 2015 Posted December 17, 2015 also... riding an incline your distance you cover is further than the straight flat surface a gps pics up. basic trig. So the speed sensor is a more accurate reading aswell as cadence senser 99% of the time. and you get speed on a IDT because they usually mount on the rear stay and wheel
Thor Buttox Posted December 17, 2015 Posted December 17, 2015 guys.......think about this one.... INDOOR TRAINEROnly serious cyclists use an IDT.
'Kaze Pete Posted December 17, 2015 Posted December 17, 2015 GPS based speed calculations are averages between two GPS fixes, which might be multiple wheel revoutions. Sensor based speed calculations are based on one wheel revolution, which is why you'll have higher peak speed measurements using a wheel magnet and sensor than with only a GPS
V12man Posted December 17, 2015 Posted December 17, 2015 I just bought a second hand 'GPS'. The Mio (Magellan) Cyclo 105. It comes with a speed sensor based on the old fashioned spoke mounted magnet and fork mounted sensor. HUH? I thought a GPS did not need this last century component. My cheapie Ryder 20 didn't have one! Does anybody have an explanation of why this thing has to use vulnerable and outdated piece of componentry.. Can I bypass it?Because it works when you don't have a GPS signal - so for example you lose signal in tunnels, sometimes in thick forest, on a trainer etc - so it makes the measurement of distance more accurate. Remember to set up the head unit so that it auto calibrates the wheel size for you - does this in the first couple of km using the gps. Definately worth using, especially if it adds cadence as well.
intern Posted December 17, 2015 Posted December 17, 2015 guys.......think about this one.... INDOOR TRAINERAnd tunnels, and thick vegetation, and triangulation (for accuracy).
intern Posted December 17, 2015 Posted December 17, 2015 Because it works when you don't have a GPS signal - so for example you lose signal in tunnels, sometimes in thick forest, on a trainer etc - so it makes the measurement of distance more accurate. Remember to set up the head unit so that it auto calibrates the wheel size for you - does this in the first couple of km using the gps. Definately worth using, especially if it adds cadence as well.I must read whole thread before posting...must read whole thread before posting...must read whole thread before posing ha ha
SwissVan Posted December 17, 2015 Posted December 17, 2015 And tunnels, and thick vegetation, and triangulation (for accuracy). And thick mist.... we had such thick mist here the other day my watch was losing the signal
WIPEOUT 1000 Posted December 17, 2015 Posted December 17, 2015 A Powertap hub combined with a Garmin gives you everything you could possibly want to record. Speed, cadence and even power, indoors or outdours.
T-Bob Posted December 17, 2015 Posted December 17, 2015 I don't use one. Gps unit only. A speed sensor would only confuse things when I throw my bryton at the Strava section finish line while trying to get back my KOM... Or when I'm in my car nailing new personal bests.
JXV Posted December 17, 2015 Posted December 17, 2015 I just bought a second hand 'GPS'. The Mio (Magellan) Cyclo 105. It comes with a speed sensor based on the old fashioned spoke mounted magnet and fork mounted sensor. HUH? I thought a GPS did not need this last century component. My cheapie Ryder 20 didn't have one! Does anybody have an explanation of why this thing has to use vulnerable and outdated piece of componentry.. Can I bypass it?It will measure speed and distance travelled at times when gps reception is poor such as under trees, in steep sided valleys, tunnels etc.
Oufy MTB (Roadie) Posted December 17, 2015 Posted December 17, 2015 the only issue i have with Edge 500 is when the spd/cadence sensor acts up whilst riding then you actually get no speed despite the unit being GPS because the speed sensor if enabled is then recognized as the speed calculator by the unit. So when it acts up the unit will say you not moving. You then have to disable the sensor and then go with Gps speed readings
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