Whilst in the mountains:
http://www.cyclist.co.uk/news/4778/...letter&utm_medium=email&utm_source=newsletter
Froome was absent from this chase and it's probably because of the efforts he produced the day before on Zoncolan.
Attacking on a 14.3% gradient, it was reported that Froome sustained 465W for 1.3km at the 4.3km to go marker to distance Yates and ride to stage victory. Assuming Froome is weighing 69kg, that means the attack would have been 6.7W/kg, a pretty formidable effort.
Froome scaled the Zoncolan in 39 minutes and 58 seconds, the sixth fastest time in history only 55 seconds down on record holder Gilberto Simoni, who set his time in 2007. This time was also the fastest ascent of Zoncolan since that Giro 11 years previous.
In reaction to Froome's attack, Dumoulin did not panic instead sticking to his numbers. For 6 minutes 41 seconds, he held 6W/kg on the 14.8% gradient dragging him along at 11.6kmh. This measured approach to the climb allowed him to only ship 37 seconds.
While the efforts of Froome on Monte Zoncolan were spectacular the weekend's show was certainly stolen by maglia rosa Yates.
On a spiky finish to Sappada on Stage 15, Yates attacked on the penultimate climb of Costalissoio before extending his lead on the descent and then holding the gap on the final rise to Sappada.
In the final 3.5km of the climb, which had shallowed to 2.1% gradient, Yates had to produce an average of 330W to maintain his gap over the chasing group and finish with his 41 second lead.
With this easing of the climb, a dropped Dumoulin managed to muster the strength to bridge to the chasing group and even sprint to third on the stage. The Dutchman managed to recoup 13 seconds on Yates in the closing 3.5km by averaging 395W.
In the final kilometre, Dumoulin caught back up to the chasing group of four. In doing so he pushed out 430W across 2 minutes 13 seconds as he entered time trial mode to limit his loses.
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