NoWhammies

What do you think takes a more accurate temperature reading? The tempe attached to my black cycling shoe OR the temperature reading that comes from the Edge 1030+?

pdlamb

Seems like an invitation to pontificate. Therefore:

On a cloudy day, probably the 1030+. Unless you're riding very fast, I'd expect the heat from your foot through the shoe would give you an erroneously elevated temperature reading. However, on a sunny day, I've seen bar-mount GPS readings 5-8F high because of solar heating. Of course, the black shoes would warm things up there, too.

For best accuracy, get a thermometer zipper pull and attach it to your saddle bag (or saddle rail). $20 and you don't need to worry about sun or not, because your bottom will shade the thermometer and the separation from your body will minimize body heating.

Iride01 

The Tempe is made for taking temperature readings and is probably more responsive to changing temperatures. The temp sensor on the Edge devices AFAIK are buried on the circuit board and likely aren't as responsive to temperature change. So the temp reading of your Edge device probably lags what the actual temp is as you ride from cooler to warmer areas. Even the Tempe likely has some amount of lag to it.

I can look at the temp data from my Edge 530 and see that it takes it about 4 - 5 minutes to come from the air conditioned temps of my home to the outside air temps on a hot day. It seems a tad faster than my Edge 500 which IIRC, it took almost twice as long for it to get to ambient temps.

Which is more accurate or which is more precise I don't know.

Troul 

i've taken note that the bicycle computer is much slower to react to temp swings, but if given some standby time, it'll read accurate. It'll be much more real-time accurate than the "local temps" displayed on the app.

Trsnrtr

Reminds me of Segal’s Law, “A man with a watch knows what time it is. A man with two watches is never sure.” I’ve found this to be true with temperature readings on bike computers and other devices. After awhile, I try to settle on one and even then, take the reading with a grain of salt.

Given that, I'd probably trust a dedicated instrument over a bike computer of any make.

NoWhammies

Thanks folks. I use the tempe for temperature readings when running b/c the temperature reading from my 745 are unreliable. My body heat really throws off the readings. The tempe on my shoe is much more accurate. Perhaps I will start using the tempe for cycling too.

fooferdoggie 

the Garmin is pretty accurate as long as your moving. but its a little slow. the Karoo is really fast but its 3 degrees off. in the summer you are more likely to get the pavement temps. when it was 117 degrees here I had the pavement temp of 135 degrees. but that was pretty accurate say you felt backed the blacktop.