Pirelli has issued Formula 1 teams with recommended maximum stint lengths for each of its tires compounds for the first time at this weekend’s British Grand Prix.

The tire supplier stressed to teams that they should still base their race strategies around their own wear data, rather than taking the number of laps given by Pirelli as a guarantee of tire life. Pirelli has suggested nobody should exceed 26 laps on the hard tire, 28 laps on the medium, and 15 laps on the soft compound in Sunday’s race at Silverstone.

It explained that the medium is predicted to last longer than the hard because the harder compound has experienced some graining this weekend.

“Our advice is not to exceed these numbers during the race,” the company added.

Its pre-race prediction for the best strategy is a two-stopper, featuring two 12-lap stints on the soft tires and a 28-lap stint on the medium.

In last weekend’s Austrian Grand Prix, Sebastian Vettel suffered a spectacular tire failure while stretching the life of his first set of tires, which had completed 29 laps of the Red Bull Ring including mileage from qualifying.