The phrase "as a flat tire" is correct and usable in written English.
It can be used to describe something that is deflated, ineffective, or lacking energy, often in a metaphorical sense.
Example: "After the long meeting, the team's enthusiasm felt as a flat tire, completely deflated and lacking momentum."
Alternatives: "like a deflated balloon" or "as lifeless as a doornail."
"The suffrage campaign reminds one of nothing so much as a flat tire encountered early on a long journey — a flat which takes so much time, labor and expense to repair that the journey is dejectedly abandoned," Millett wrote, with characteristically pointed humor.
These days no one expects so much as a flat tire.
These days no one expects even so much as a flat tire.
If You Get A Flat Many cell phone providers and car companies offer assistance programs that help with minor car issues such as a flat tire or running out of gas.
He was about as insightful as a mechanic explaining a flat tire to you.
An amber hunter named Sue Hendrickson, working with the Black Hills Institute of Geological Research, a company that collects and prepares fossils, had wandered off to explore a bluff as her crew changed a flat tire, and came back with a handful of dinosaur.
Checking your tire pressure saves you from having blown tires while in motion which can cause an accident or cause you to be stranded in a place you can't readily get help as a result of a flat tire.
Learn how to cook, do housework, and other basic tasks, such as auto repair, changing a flat tire, fixing a leaky tap, etc. Help out your parents and anyone you see who's in trouble.
As he bent to change a flat tire, a gunman shot him eight times in the body and once, at close range, in the head.
In a chilling scene in the pilot episode, for instance, Joe gets a flat tire as he is driving a truck carrying one of the contraband newsreels west across the American Reich.
Evidently, I'd had a flat tire as I pulled up to the site, left front, and it was a motherfucker getting the spare out of a three-quarter-ton Ford, the Ford jacked up on the soft ground, and the whole muddy wheel into the bed to take to town.
