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Sudden Inaccuracy Forerunner 955 Solar

Hi,

I have had my 955 Solar for about 7 weeks.  I regularly exercise on a coastal track with distance posts added by the local university athletics club, using a measuring wheel.  Before this watch, I had a TonTom Spark, which was very accurate, and a Fitbit Versa 3, which was not only inaccurate, but inconsistently inaccurate - like up to 30% short in distance.

Up until yesterday, the 955 solar has been dead on except for one time when one 0.5 came in at 0.49.  I had been so impressed after the Fitbit debacle.

Yesterday however, it gave a consistent 6% error the whole way, i.e. each 0.5 increment under reading of 0.47.  The weather was cloudy, but it has been so without errors in the past.

I have not altered the default settings at all.  Anyone have a suggestion as to my issue.  I should note that Strava on my cell phone over reads by 3% consistently on my usual track.


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