Schumaker.
The snail would not be able to exert enough weight on the pedal, and even if it was on the pedal, it wouldn't reach high enough to turn the wheel.
If that snail is Spongebob Sq. Pant's pet & personally trained by Spongebob.. not only will the snail in F1 drive the car super fast, he can even win the race & break all records in Spongebob Sq. Pant's DREAMS laaaah..hahahaa