F1 testing 2025 gallery: All the latest technical details on display in Bahrain – Day 2

Join us as we delve into the technical details on display during the second day of pre-season testing in Bahrain.

Be sure to check back regularly throughout the day too, as we’ll be sure to keep it updated with the latest images from the circuit.

F1 Testing 2025: Digging into the details on day 2

Ferrari installed a small but interesting Kiel probe array on the SF-25’s for Lewis Hamilton’s first run, with four Kiel probes out ahead of the front wing to gather data on what the wing is receiving

McLaren had multiple Kiel probe rakes mounted on the MCL39 for their first run of the day, with a rake behind the front wheels, in the centre of the car and behind the rear wheels. A significant amount of data will have been captured here on the whole aerodynamic map of the car, which will help with correlation for their simulation tools.

The Haas VF-25 with a much more simplistic Kiel probe rake mounted behind the front wheels shows the different level of definition that they’re working with compared to their rivals

The Racing Bull VCARB02 with the same, very wide, Kiel probe rake mounted behind the front wheels that they had on the car for the first run on day one.

Red Bull have the supplementary driver cooling inlets in use on the vanity panel, which although not a new feature is interesting to see given the ambient temperatures in Bahrain. Also note the horizontal Kiel probe rakes hung from the side of the airbox.

Not new but worth noting is the smaller ‘mouse house’ that Haas use in the sidewall of their diffuser, which also has a wider footplate than some of their rivals.

Alpine with a pair of rakes mounted behind the rear wheels on the A525, notably with the Kiel probes oriented in the expected direction of flow.

A nice look at the rear end of the Red Bull RB21 as it exits the pitlane, with a row of Kiel probes notably squirrelled away under the left-hand side of the floor.

Ferrari have mounted cameras inside the sidepod inlet that are looking across at the rear of the tyre on the SF-25, with the footage likely being captured by an infra-red camera that will give the team insight on how the tyres are performing.

A Mercedes mechanic applies a liberal amount of flo-viz paint to the front wing endplate, where you’ll also note the team have some chequered stickers which are being monitored by a camera mounted on the side of the nose.

A nice overview of the Racing Bulls VCARB 02

Mercedes applied flo-vis paint to more than just the front wing endplate, as the team look to gather visual confirmation of the various flow structures over the car. Notably, Mercedes don’t usually use a green flo-viz paint either, normally it’s a more translucent offering.

Williams with red flo-viz paint on the rear wing and beam wing of the FW47

Flo-viz paint added to certain areas on the Racing Bull VCARB02’s front wing, as the team look to get specific about how the airflow is performing

A close up look at the wing mirror assembly on the Sauber C45, which has some interesting details that will surely garner interest elsewhere on the grid too. The detached inboard portion of the mirror stay was already a feature of their design in 2024 (circled) but undoubtedly helps tidy up some of the losses associated with the cockpit region.

Meanwhile, new for 2025 is the winglet mounted on the outboard end of the mirror body and has multiple elements on it to help drive the airflow around the mirror body.

A look at the two engine cover cooling options we’ve seen on the McLaren MCL39, with a tighter variant fitted today (left, arrowed) that features an indented lead panel to complement the indent found in the rear section of the bodywork.

Ferrari spraying flo-viz paint on the front brake duct and suspension of the SF-25

Some free flo-viz in this image as the water from the kerb is kicked up and thrown down the side of the car

A look beneath the outermost drum of the front brake duct on the McLaren MCL39, with an outlet feeding into a channel above where the caliper will be situated, whilst two baffles are mounted on the lower outer section of the outboard sunken portion of the interior drum.

A closer look at the detail on the edge of the Ferrari SF-25’s floor

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