oversprung

Added to which, bus drivers are rude, the buses are oversprung with too many passengers standing, hordes of kids get on without paying a fare, buses inspectors maintain as best they can the drivers 'time card timetable and are rude to the travelling public who wonder about customer service.

Smoking Guns and the Morality of Parliamentary Privilege 2008

How many light years had their lumbering _other_-buses oversprung, and in which direction?

Analog Science Fiction and Fact 2004

Those wide tyres flap over drain covers and into potholes and it feels oversprung, but the ride is just tolerable.

Telegraph.co.uk - Telegraph online, Daily Telegraph and Sunday Telegraph 2011