New bargeboards offer first glimpse of Red Bull upgrade

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While the Milton Keynes-based outfit has played down the extent of the changes to its car, it is clear from what has appeared so far that the team has pushed hard on the aerodynamic front.

The new bargeboards feature a new fin along the middle section, and have a run of horizontal finger sections that follow a concept used by Mercedes.

Speaking at Barcelona on Thursday, Daniel Ricciardo said that it was unlikely Red Bull's changes would be enough to lift his team on a par with Ferrari and Mercedes, but he hoped it could close the gap.

"We still have to expect to be where we are, hopefully closer, but I don't think we can expect to come out and win this weekend," he explained.

"We want to. We would like to but we can't really expect it. Even if the update gave us a second, we know that Mercedes and Ferrari aren't going to come here with nothing.

"The target is to at least close the gap, but I don't think we should expect it before we've driven the car."

There had been wild speculation earlier this week that Red Bull could go as far as introduce a new chassis for the Spanish GP, but this was denied by the team.

Ricciardo admitted that the team's focus remained on aero improvement rather than any mechanical or structural changes.

"As always, this time of the year, it's big aero stuff - that's the main upgrades," he said.

"The real mechanical side of the car, you kind of got what you've got - it's mainly bits which are predominantly aero, so sidepods and all that kind of stuff, wings.

"It's pretty much everything we can play with. The guys have redesigned and tried to give us a bit more.

"There are a lot of bolt-on bits but it's still the same car itself, so that's why we have to be a bit careful not to expect too much as it's still the same chassis essentially. These bolt-ons should give it something."