F1 | Pirelli brings back C6 to Monaco as mandatory two-stop rule debuts. Pirelli brings back the C6 compound for the Monaco GP.

The Monaco Grand Prix is one of the most iconic and prestigious events on the Formula 1 calendar—not only for its history but also for the unique charm that surrounds it. First held in 1929, it is one of the oldest Grands Prix and forms part of the so-called “Triple Crown” of motorsport, alongside the 24 Hours of Le Mans and the Indianapolis 500.

Extremely narrow streets, tight corners, elevation changes, and the famous tunnel that ends on the seafront—all of this makes Monte Carlo a circuit like no other. Here, precision matters more than power, and the margin for error is virtually nonexistent.

From a technical standpoint, it is one of the most complex races: cars are set up with maximum aerodynamic downforce, but with so few overtaking opportunities, qualifying often becomes decisive for the final result.

For the second race in a row, Pirelli has selected the three softest compounds from its 2025 range. As in Imola last week, C4 will serve as the Hard, C5 as the Medium, and C6 as the Soft, with the first two being mandatory for use in the race. But there’s another new element too.

This weekend will also introduce a key regulatory change, specific to this event: at least two pit stops will be mandatory during the race. The goal of the FIA and F1 is to make the traditionally linear and monotonous Monaco GP more dynamic, as seen in 2024.

The new format also includes the addition of one extra set of Full Wet tyres per driver to the standard allocation, to ensure the double-stop rule can be implemented even in wet race conditions.

It will be interesting to see how teams develop their race strategies. For example, the absence of prescribed pit-stop windows could present opportunities for drivers starting at the back of the grid to gain ground by running in clean air.

The two-stop rule eliminates concerns over tyre degradation, which is traditionally very low on this circuit. This could also open the door to using the Soft compound if a second pit stop is delayed significantly or if a late Safety Car is deployed.

Drivers on the podium at the Monaco Grand Prix will also wear a special edition of the classic Pirelli Podium Cap, designed by Denis Dekovic in the colors of the Monegasque flag. It is the fifth version of the Podium Cap presented this year by Pirelli Design. You can buy the Pirelli cap for the Monaco GP here.