That's interesting seeing your power graph (well not really but you know what I mean). You seem to be getting extended periods where your watts drop. I've also been getting this recently but there's no loss of speed (we both appear to have had it a bit during the middle of the ride). I also got it at the end (hence my 360W compared to your 918!)That was the irony of it.
I was setting a hard tempo on the final climb knowing we had a micro rest coming and was making sure I didn't loose you but when we hit 900 watts at the end I popped (check predictive text).
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But you were not doing 900 watts (you must have come off of my wheel!)
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