love2fly Posted November 10, 2018 Share Hi hope someone can shed light... My Bryton gives an uphill (and downhill) AVERAGE gradient reading.On stage 1 of this year's W2W it reflects Uphill average as 44%.This seems extreme but I just want to make sure.I have read on the Hub somewhere that Bryton records any slope steeper than 2.5% as uphill, therefore I suppose it takes all the climbs steeper than 2,5% and averages them, thus excluding any flat or descent and gives a reading.Is the 44% correct? Day 2 was 29% *(he rain shortened day)and Day 3: 13%.Due to using a barometric altimeter I expect to have SOME margin for error.I would be interested to compare with Garmins etc?Cheers Link to comment Share on other sites More sharing options...
FDP Posted November 10, 2018 Share 44% would not be rideable. Not to mention an average of 44, meaning there must be steeper climbs. The way I calculate average gradient is as follows: 50km ride, 500m total elevation gained, gives 1% average. I guess Bryton expresses a different metric, but definately not one used in common cycling speaking terms. Link to comment Share on other sites More sharing options...
love2fly Posted November 11, 2018 Share 44% would not be rideable. Not to mention an average of 44, meaning there must be steeper climbs. The way I calculate average gradient is as follows: 50km ride, 500m total elevation gained, gives 1% average. I guess Bryton expresses a different metric, but definately not one used in common cycling speaking terms.Yip that is Elevation gain, They measure elevation gain as well as average gradient,....If you look at the Day 1 route profile parts of Gantouw pass are helluva steep.I really would like to get a comparison from other W2W participants and what their GPS read. Link to comment Share on other sites More sharing options...
Knersboy Posted November 11, 2018 Share Yip that is Elevation gain, They measure elevation gain as well as average gradient,....If you look at the Day 1 route profile parts of Gantouw pass are helluva steep.I really would like to get a comparison from other W2W participants and what their GPS read.Can’t help with a comparison but can help with common sense. Doesn’t matter how steep grabouw pass is, it is never 44%, that is more like mountain climbing than cycling. Link to comment Share on other sites More sharing options...
NC_lurker Posted November 11, 2018 Share Is it not possible that the metric is actually "percentage of ride that is classified as uphill". Then 44% would make sense. In other words for 44% of the total ride distance you were going up an inclined slope as opposed to flat or descending. Link to comment Share on other sites More sharing options...
love2fly Posted November 11, 2018 Share Is it not possible that the metric is actually "percentage of ride that is classified as uphill". Then 44% would make sense. In other words for 44% of the total ride distance you were going up an inclined slope as opposed to flat or descending.That's maybe plausible.....Oh and BTW, my altitude gain is similar to what route profile says so that says my Bryton wasn't misreading. Link to comment Share on other sites More sharing options...
Me rida my bicycle Posted November 11, 2018 Share That is just the amount of uphill for the ride 44% was up and the rest was down or flat. Mine works the same gives elevation gain, highest elevation, lowest elevation and amount of up (%) Link to comment Share on other sites More sharing options...
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