Friction and noise aside, it's better to have the suspension built into the frame rather than the wheels. Added weight in the wheels adds to rotational inertia,

Friction and noise aside, it's better to have the suspension built into the frame rather than the wheels. Added weight in the wheels adds to rotational inertia, which is harder to overcome than linear inertia. A rough rule of thumb is one kilogram in the wheels is worth two in the frame for a car in terms of acceleration.