With corners such as Eau Rouge and Blanchimont testing drivers and tyres alike, Pirelli says the longest track on the Formula One calendar will pose a range of challenges, especially considering the variable weather that characterises the region – in fact, the length of the circuit means that different microclimates can mean the track is both wet and dry depending on where drivers are. The tyre supplier will take its P Zero White medium and P Zero Yellow soft compounds – like at the Grand Prix of Europe and the German Grand Prix earlier this year – but it is likely the P Zero Blue intermediate tyre will play a key role once again. Pirelli has not tested at Spa-Francorchamps, and the high vertical and lateral loadings on the tyres, mean that the manufacturer will be in for an intriguing weekend. The length of the lap should help differentiate between the two compounds more too, which will enhance the importance of tyre strategy. Pirelli expects wear to be quite low, owing to the cool conditions and flowing nature of the track, with fewer sharp corners than at most other circuits.