The rusty iron chain that double-locked the cart to the front wheels of the cycle began to squeal as he rode.

NEWYORKER: The Elephant

He looked through the kitchen window, but the yard was empty and all he could see, among the thistles and scrap iron, was a dilapidated cart with two rusty wheels.

NEWYORKER: Waiting

It was an open cart with two wooden-spoked, iron-rimmed wheels, not the old automobile tires that you used to see on a common utility wagon.

NPR: Excerpt: 'World Made By Hand'

Opportunity has a sore shoulder in its robotic arm, and one of its wheels is stuck at a slight angle so the rover handles more like a wobbly shopping cart.

NPR: Mars Rover Marks Second Anniversary of Landing