Did a ride last night, same ride as I did on Monday, so last night I created a Course from Monday’s ride and Followed it. I was able to see my location and a comparison on the altitude profile and map to Monday’s ride. I’m also able to see an exact measurement of how far ahead or behind I was.
Route was 37 miles, basically uphill first half to the top of the Brickworks and then downhill all the way home. Felt really tired on the climbs, so was a lot slower up the big climb. At the bottom of the climb I was about half a mile behind, at the top I was 2 miles behind. So I’d lost 1.5 miles over a 3 mile climb. In my book that means I went up twice as fast on Monday, but I went up at 10mph last night. There’s no way I did 20mph on Monday as that’s about my flat pace!
Then all the way back I was slowly closing the gap, think I was faster down the big hill, but not once it levelled off. Got home 0.1 miles ahead. Then I compared the routes and was cycling for 2.5 minutes less overall last night. Which would be roughly 0.8 miles ahead.
I haven’t a clue what the calculation Garmin does is, nothing seems to make sense! I thought it would be time based, so where was I on Monday after 30mins etc, but then the gap would close up massively at the start of a big climb and wind out rapidly once the leader was over the crest of the hill due to the relative speed difference at each point in time.
Confused!
Cheers.