Stage four of this year’s Tour of Britain was the longest of the 2016 race, as the peloton raced down through Wales from Denbigh to Builth Wells.

And as they did for stage two, Dig Deep Coaching have taken a closer look at the power data from selected riders to examine exactly what it took to ride the stage.

Won by Dutch champion Dylan Groenewegen (LottoNL-Jumbo), the stage saw plenty of attacking and counter-attacking before coming down to a sprint finish.

Bardiani-CSF’s Alessandro Tonelli was one of the men in the break – his power-to-weight ratio shooting up to 6.20W/kg as he escaped the clutches of the peloton.

By contrast, the 298 watts he put out over Bwlch-y-Safan gave a much more modest ratio of 4.38W/kg.

– The numbers behind the Tour of Britain: stage two power data –

And it is not just escaping the peloton which sees the watts ramp up, either – Cannondale’s Ryan Mullen seeing his own numbers rocket as the pace was ramped up in the peloton to bring the escapees back.

Once onto the Royal Welsh Showground, it came down to a sprint finish, as we said, so what sort of effort does it take in the bunch sprint?

With team leader Caleb Ewan dropped earlier in the day, Orica-BikeExchange’s Luka Mezgec led their sprinting charge and the Slovenian’s cadence ramped up to 114rpm for his 18-second effort – enough to earn seventh place.

Check out the full collated power data in the infographic below, alongside graphics from VeloViewer.

Click on the image to below to enlarge it.