The Milton Keynes-based squad was in a class of its own throughout the 2023 season, winning 21 out of 22 races on its way to capturing both the constructors' championship crown and the drivers' title with Max Verstappen.
While its rivals focused their efforts on trying to work out why Red Bull's car was so good, the squad has suggested that central to it was weight.
Red Bull team boss Christian Horner has explained that, with much of the car actually being a carryover from the RB18, the biggest step change was cutting out excess bulk that had left it overweight throughout 2022.
Asked by Autosport if Red Bull understood why the RB19 was so dominant, Horner said: "What you have to remember is that with the RB19, there were a large number of components that came from the RB18: gearbox, a large percentage of the suspension, and half of the chassis. It was effectively a cut-and-shut for this year.
"The most significant thing that we were able to address was the weight. We were so late going on to the new regs in 2021, because of that championship battle [the previous year] that the car in 2022 was a bit on the chunky side.
"So, we managed to get 20 kilos out of the car coming into this year, and tidy up some of the imperfections.
Source: Autosport