One after another, buses were pulling into position at Woodlake Hills Middle School.
"I turned around, I looked at the big tire right next to me and I thought, 'How is this possible?'" said a middle school parent who asked to remain anonymous.
The mom said she was surprised to see just how bald the bus tires were.
"I thought this whole thing, if this bus hits the brakes, it could just slide and hit other cars and there go the children flying everywhere," said the concerned parent.
The bus driver explained that he'd had a conversation with transportation about the tires nearly a month prior, yet a district mechanic said the tires were never brought to his attention.
Within 24 hours, of the KSAT Defenders' inquiry, the district inspected them.
"The mechanic did look, see a visual inspection, actually measured it and it did fall within acceptable standards," said Judson Independent School District Director of Communications Aubrey Chancellor.
Acceptable standards for bus tire tread is 4/32 of an inch for front tires and 2/32 of an inch for rear tires.
According to Chancellor, the tires on bus No. 55 -- the bus in question -- measured between 9/32 and 3/32 of an inch deep, arguably borderline, which is why the district has since replaced them.
"I saw some other buses whose tires are decent (and) they're fine, but some other tires, some of the buses, their tires are not fine," said a school parent.
The majority of tires the Defenders saw had adequate tire tread, but there were a few others that were questionable.
Chancellor explained it is up to the bus driver to do a visual inspection of the tires before and after every trip, every day.
"We also have a visual inspection of all the tires on every bus about two to three times a month," Chancellor said.
The district said there was no documentation for tire inspection dates for bus No. 55.
According to the district, bus No. 55 is four years old and has more than 61,000 miles on it. The tires had never been changed.