Xert has something for everyone.
Will it be applicable for off-road riding / mountainbiking at some point? I love hunting for segments, itās the best intervall training you can get outside. 
I would think the method we use would be applicable to mountain biking but weād be looking for feedback on this from our users on how well it works for them.
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OK, XATA tells me to chill until next week Monday, then Iāll give it a go. 
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I suspect the wind will have a significant factor in any of these calculations. What are the chances you could add wind into the calculation? Where I live there is always a wind factor. Allowing us to add a certain wind speed/direction on a segment would result in a more realistic estimate. Also I think you can get the wind speed and direction online for the time/date of the past PR and the current ride. (I have not always found the online wind speed and direction to be accurate) Just letting the users add-in a wind speed/direction would let us use (what-If scenarios).
Bug with unit conversion.
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Hi Armando and thx for this improve and info. Just one question: from the update, i not see the line, in the diagram chart,ātargetā, is missing. I find very useful this option for comparise the workout w/ the work on the road. Thanks so much for help and sorry for my bad english, i not love the translator ;O) Thanks again. Corrado.
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Hi Corrado. Weāll get that sorted. Thank you!
UPDATE since my initial testing ā
Rode a 50-mile loop this morning with some off and on hard plus a few steady efforts. Rated Difficult Polar Breakaway Specialist Ride when done.
Viewed activity details, selected View on Strava, three PR segments were listed, selected āView all resultsā, scrolled the list and starred a variety of segments from less than a mile (sprints) to 20 miles (rolling), returned to Xert. selected Advanced Stats, Refresh and one by one worked through the list evaluating the BTE predictions.
All nine entries look to be reasonable estimates and perhaps attainable considering the goal is an all out BT effort. 
I also went back into Strava and compared the predicted BTE times to the leaderboard for my age group to confirm viable times. Curiously the age group dropdown on the Strava website stops at 55-64 although you can select By Age (65-69) on the phone app. 
In my case, if a BTE segment attempt was successful, Iād be shy of any QOM times shown (forget about KOM 
) but I expect that at my age.
I did notice a slight bug. At one point there were more than nine segments listed (some were dupes), then there were less than nine. But things sorted themselves out by clicking Refresh.
Gave one of my local segments a try. Failed to get the KOM by 1-2 seconds, but got a gold breakthrough (and collapsed out in the woods ). With this effort in (and a couple of non-max efforts, but with power data, on other segments) the projected results for those segments are now much more reasonable. I just got my power meter pedals 2-3 weeks ago, so the algorithm was was using Strava estimated power for past efforts, which returned quite some nonsenseā¦
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Strava segment calculations are now looking much better for me, looks like some bugs (kilometers?) have been fixed.
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