The FIA has published the post-qualifying weights of the cars ahead of the Abu Dhabi Grand Prix, with Robert Kubica the lightest driver heading into the race.
The Pole goes into his final race with BMW Sauber weighing in at 654.4kg, putting him just lighter than Rubens Barrichello's Brawn GP.
Pole man Lewis Hamilton is the fourth lightest driver on the grid and will be pitting earlier than closest rivals Sebastian Vettel and Mark Webber on race day. However, the difference between the cars doesn't explain the large gap between Hamilton and the rest in qualifying.
Renault has elected to run both Fernando Alonso and Romain Grosjean on heavy fuel loads, with the pair being easily the heaviest cars on the grid.
The full list is as follows (their actual starting position is in brackets at the end):
Brawn GP-Mercedes 655.0kg
Brawn GP-Mercedes 657.0kg
Red Bull Racing-Renault 660.0kg
Scuderia Toro Rosso-Ferrari 661.5kg
Red Bull Racing-Renault 663.0kg
Force India-Ferrari 695.0kg
Force India-Ferrari 696.0kg
Scuderia Toro Rosso-Ferrari 696.5kg