Garmin Edge 200 vs Polar M460 ....what gives ??

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cyclotaur
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Garmin Edge 200 vs Polar M460 ....what gives ??

Postby cyclotaur » Thu Sep 13, 2018 3:29 pm

I've had the Garmin since late 2011 and used it exclusively until getting the Polar (with HRM) last Xmas. Since then I've mostly used the Polar but since I got a 'new' road bike last week I put the Garmin mount back on the gravel bike and the Polar mount on the road bike.

I'd done a few comparison rides early this year and noted a few discrepancies but nothing major - different elevations mostly - but time and distance data was close enough. I think the biggest difference was maybe 1 km in about 75 for distance with Polar reading slightly shorter. Today I did a ride on the gravel bike with the Garmin and for fun I carried the Polar in my jersey pocket.

Moving Time:
Garmin read 2:33:18......Polar read 2:33:20 - pretty close.
Elevation:
Garmin read 418m ……..Polar read 435m - also close.
Distance:
Garmin read 51.01 kms….Polar read only 48.48 kms...... Huh??

Anyone struck such a large distance discrepancy between devices? I mean that's 5% in 50kms.

I've noted big elevation differences between bike computers and the iPhone Strava app but the time and distances always matched up. This difference seems pretty significant to me.
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rodneycc
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Re: Garmin Edge 200 vs Polar M460 ....what gives ??

Postby rodneycc » Thu Sep 13, 2018 4:11 pm

One isn't using Glonass instead of GPS is it? But yeah sounds dodgy. What did the GPS on your Phone say. Would be a good comparison as well.
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cyclotaur
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Re: Garmin Edge 200 vs Polar M460 ....what gives ??

Postby cyclotaur » Thu Sep 13, 2018 4:23 pm

Glonass ? :?
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rodneycc
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Re: Garmin Edge 200 vs Polar M460 ....what gives ??

Postby rodneycc » Thu Sep 13, 2018 10:07 pm

Yeah its like the Russian satalites. Garmins can use both or either. Maybe just Google it. :-)
2013 BMC TM SLR01;2013/14 Bianchi Inf CV
2013 Lynskey Helix;2013 XACD Ti Di2
2013 Giant TCR Adv SL1;2014 Giant Defy Adv SL

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cyclotaur
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Re: Garmin Edge 200 vs Polar M460 ....what gives ??

Postby cyclotaur » Fri Sep 14, 2018 2:33 pm

rodneycc wrote:Yeah its like the Russian satalites. Garmins can use both or either. Maybe just Google it. :-)

Yep, thanks, did exactly that. It seems Garmin uses both by default, Polar only uses GPS.

Anyway, did the same again today and the results for distance were within 180m over 39kms, so much better. Todays ride was basically east up the Koonung Trail, whereas yesterday was north up Darebin and back down Plenty Trail.

Perhaps those Russian satellites have better coverage over the Peoples Republic of North Yarra !! :D :D
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"Riding not racing...."

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