(section: 1 / paragraph: 1 / line: 2)
It must go around the can, vehicles are not permitted to pass over the can.
(section: 3 / paragraph: c / line: 1)
Yes, rule 3.c. applies only to the wheels.
All wheels in any ready to run configuration must fit within a 25.0 cm x 60.0 cm space. Measurements are made from the outer most edges of the wheels. Other parts of the vehicle may be longer or wider.