Velon belatedly release Chris Froome’s power numbers from Giro d’Italia attack

Power data from Chris Froome‘s stage-winning and race-upending ride on stage 19 of the Giro d’Italia has been made public, with the Team Sky rider averaging 397 watts for a three-kilometre stretch on the Colle delle Finestre, where his remarkable 80km solo victory began.

Froome went on to win the Giro, his third straight Grand Tour victory, but the data was only made public on Monday, the day after he’d been crowned in Rome and 72 hours after the stage itself.

In the interim, Froome’s performance had ignited debate, with some at a loss to understand how the Briton, who had been listless for much of the Giro, had turned the race on its head in such spectacular fashion.

Eyebrows were raised when Velon, the business group that represents 10 WorldTour teams, released their daily ‘rider data summary’ from the stage. While power output figures were given for six other riders, including Tom Dumoulin, there was no data for the stage winner. The only numbers that were listed were his times, average speed, and top speed for selected sections of the course – the last 6.7km of the Finestre, the whole descent, and the subsequent Sestrière.

On Monday evening, however, they issued a press release showing 397 as ‘the number behind Chris Froome’s stunning attack on the Colle delle Finestre’. It was accompanied by a photo of a pink jersey signed by Froome, with 397W written on the chest along with ’19’ – the number of the stage.

Froome, the data says, put out an average of 397 watts over 3.02km and 11 minutes 3 seconds as he rode away from Dumoulin et al, turning the pedals at an average cadence of 95rpm on the 9.3 per cent gradients. His heart rate – the other metric used by Velon – was not made public.

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