Leaving it all up to the tires is just too simple.
We all know the FW24 wasn't a very good chassis, wasn't bad, but could really not be compared with the Ferrari.
The F2002 has first of all a low and very efficiently shaped nose, which keeps pressure on the front wheels.
Secondly, the center of gravity was lower than with any other car at that time. Renault may claim that isn't true, but it's there more in the weight of the car than just the engine...
Furthermore, the rear was made quite low, which kept more air flowing onto the rear wing, making it more efficient with the same amount of drag that other teams had.
What do we see in this year's tests? All cars shape the sidepods smaller and lower, and claim to have lowered the centre of gravity and the weight.. as usual in fact, but it's been more important than ever if they want to play in the game in 2003.