Mercedes arrived on the Canadian Grand Prix with its first main improve package deal of the season. The staff of championship chief and revised, amongst different issues, the entrance wing and ground, though rivals additionally took an curiosity in a number of options on the rear of the W17.
Since winter testing, groups have been looking for intelligent methods to increase the diffuser, for instance by introducing extensions hooked up on to the rear crash construction. Making the diffuser work as successfully as potential is an important facet, particularly now that the present era of automobiles depends much less on floor impact.
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Mercedes Montreal-spec diffuser
Mercedes Montreal-spec diffuser
The diffuser Mercedes launched in Montreal significantly caught the attention due to a number of additions on its higher part – within the type of spike-like profiles.Mercedes added serrated profiles alongside the higher part of the W17’s diffuser, overlaying greater than half of its width. Their objective was successfully to increase the diffuser and improve its impact.
After Ferrari and several other different rivals noticed the answer, the Scuderia requested the FIA for clarification and raised the query of whether or not it might be allowed to develop the same design, however was not given the inexperienced mild to take action.
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Motorsport.com has realized that the FIA primarily wished to make clear its stance, because the Mercedes improve may open the door to extra inventive options that the governing physique wouldn’t be comfy with.
Lewis Hamilton, Ferrari
Lewis Hamilton, Ferrari
That led to a technical directive following the Barcelona Grand Prix, a doc that comes into drive from the Austrian Grand Prix weekend onwards.
As of 2026, such a doc is known as an FIA doc relatively than a technical directive, though that’s only for consistency functions, as an FIA doc can cowl all areas from sporting issues to technical ones.
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Mercedes has acknowledged that, in keeping with the brand new pointers issued after Barcelona, some ‘minor tweaks’ to the diffuser had been required, and people adjustments had been already seen throughout media day in Austria in varied images.
The diffuser extensions are nonetheless on the W17 to a sure extent, however with out the spike-like profile. Other than Mercedes, Racing Bulls has additionally been requested to alter its diffuser extensions.
The present scenario nonetheless leaves some room to discover this space in a much less excessive manner, which has been confirmed by different groups within the paddock. They clarify that whereas the best way Mercedes carried out the trick on its Montreal-spec diffuser is now prohibited, just about all groups are nonetheless exploring methods to successfully lengthen the diffuser.
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Ferrari automobile tech element
Ferrari automobile tech element
That may also be seen in photos of Ferrari’s 2026 challenger. The picture above exhibits extensions on the diffuser of the SF-26. Buyer staff Haas makes use of the same idea, albeit with a number of parts.
These options – similar to Mercedes’ revised Austria spec – fall throughout the boundaries of what’s permitted, though the FIA wished to shut the door to extra excessive designs going ahead.
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