Are cut tires okay?
If it’s a cut, you’re going to need a new tire unless the cut is ¼ of an inch or less. This is because cuts can sever the steel cords within the tire, which give the tires their strength. Patching a cut of this caliber would prevent an air leak, but it wouldn’t restore the tire’s strength.
Can you drive with a cut on your tire?
If the tire has a hole in the sidewall, in some cases you can still drive for limited periods, but it should be done slowly as handling and even braking will be compromised. Most manufacturers don’t recommend driving more than 25 to 75 miles with a damaged run-flat tire.